Th400 overdrive

I already have crossover steer. I have the original 4l60 trans but I also have a 700r4 k case but both need rebuilt. I’m wondering if I would be better off rebuilding my 700r4 and upgrading it or getting a th400 and a gear vendor’s overdrive unit. I plan to use it as a dual purpose rig.

Th400 overdrive. Nov 30, 2021 · The car uses a Rossler TH400 three-speed automatic connected to a Gear Vendors overdrive. The tire is 36 inches tall (static—it grows 2-inches in the traps), and the rear gear ratio is 4.56:1.

The 700R4 Conversion Kit includes most everything you will need when attempting a conversion, minus the driveshaft work. This Conversion Kit is often used when converting from a TH350, TH400, or Powerglide transmission to the 700R4 transmission. Monster Sale Price: $549.99. Buy in monthly payments with Affirm on orders over $50.

Aug 8, 2020 ... Gear Vendors Under/Overdrive transmission parts Review. Gearvendors is bar none the coolest towing & Torque splitting parts to make your rig ...The Gear Vendors under/overdrive is an extremely heavy-duty auxiliary transmission that's easy to install, gives you a 0.78:1 underdrive or overdrive, can improve your fuel mileage up to 20 ...A few of the most bombproof: Ford's C6, Chevy's TH400, and Chrysler's 727 are all considered the all-time end-all auto trannies for swapability and strength. We recently had Orange County ...TH400 - Turbo 400 Planetary Overdrive. An overdrive unit is designed to maintain cruising speeds of the vehicle while simultaneously reducing the RPM produced in order to better fuel economy and prevent excess noise and wear made by the various parts of the transmission.Mechanical Overdrive on TH400. I have a mechanical overdrive that replaces the tail shaft on a TH400 transmission. I have tried everything to find out what it is and who made it. My BB Chevy is pushing 700HP and the overdrive holds up. The only markings on it are R11-1P, W.G. Div. and J-26-62 which would suggest it was built …(RTTNews) - Rocky Mountain Chocolate Factory Inc. (RMCF) said that its Board has approved the termination of the company's stockholder rights plan... (RTTNews) - Rocky Mountain Cho...Cons: it’s really heavy (110 pounds MORE than a TH400) and has the highest HP loss of all transmissions, can easily be built for 1,000 HP. 5-6 grand built “right”. -Gear Vendors overdrive. Cons: Gotta beat the floor up a bit, I think it’s 60 to 80 pounds, bad drive line angles. Around $2,700.00. TH400 Planetary. This is designed to maintain cruising speeds of the vehicle while simultaneously reducing the RPM produced in order to better fuel economy and prevent excess noise and wear made by the various parts of the transmission. Monster uses this in conjunction with the TH400 planetary gearset to allow the gears to turn at their peak ...

The stock console shifter that controlled the PG will work with the TH350 as well, but you may want to replace the stock indicator bezel with one from a TH350- or TH400-equipped car to keep track ...A 200-4R would be a better candidate to replace short shaft Th400. Possibly the same driveshaft, different yoke, same crossmember. Even installing a 700, you should be able to use the stock crossmember in a Chevelle, except a convertible. ... If i were to go with the 200 overdrive tranny, would i need the same stall converter i have now on the ...Reticulocytes are slightly immature red blood cells. A reticulocyte count is a blood test that measures the amount of these cells in the blood. Reticulocytes are slightly immature ...The car uses a Rossler TH400 three-speed automatic connected to a Gear Vendors overdrive. The tire is 36 inches tall (static—it grows 2-inches in the traps), and the rear gear ratio is 4.56:1.Twice as strong as any otheroverdriveyou can buy. PRICE SCHEDULE – F Pricing is subject to change without notice. SYSTEM PRICING PRICE CODE Rvs Trucks Cars Racing Install & Driveshaft RVs&Trucks A $2,895 $2,695 $850 B $2,995 $2,795 $850 C $3,095 $2,895 $950 D $3,295 $2,995 $950 E $3,395 $3,095 $950 F $3,495 $3,295 $950 … Continue reading Price Schedule →

The Ranger shifter and twin-stick shifters for the Atlas 3.0:1 T-case are also seen where we chose to place them. Ranger Torque Splitter Pros & Cons. Pros. Super tough and durable. Shifts just ...Muscle Cars / Hot Rods GEAR VENDORS can give your GM / Dodge / Ford vehicle up to twice the forward gear ratios, unparalleled performance and the ultimate in horsepower handling of any auxiliary transmission. There is no competing underdrive or overdrive transmission available on the market that will give you the performance of a … Continue …Gear Vendors review. As of 9/21/2012 I completed the install of the under/overdrive gear vendors unit. Once I received the box and looking at the unit it's pretty sweet looking piece and I was excited to get it installed. Now just so everybody knows I'm not a mechanic just a weekend warrior that's learning as I go.Yes, the same stand-alone electronic trans controller will be necessary, but this transmission is essentially a TH400 with a built-in overdrive. Unlike the 700-R4, the 4L80E is a true three-speed with a 2.48:1 first gear ratio. The 4L80E’s overdrive is only 25 percent (0.75:1) so it won’t lower the cruise rpm quite as much as the 700-R4 will.GM retroactively called the TH400 the "3L80" when the 4L80E debuted. The 4L80E (and its 4L85E derivative) are candidates for heavy, powerful vehicles in need of an overdrive transmission.A currently popular option for additional torque capacity is the 4L80E four-speed automatic. This transmission essentially adds a 0.70:1 overdrive ratio while retaining the original TH400 ratios. This transmission has proven itself as capable of handling well over 500 lb-ft of torque of continuous duty.

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The car uses a Rossler TH400 three-speed automatic connected to a Gear Vendors overdrive. The tire is 36 inches tall (static—it grows 2-inches in the traps), and the rear gear ratio is 4.56:1.The Gear Vendors under/overdrive is an extremely heavy-duty auxiliary transmission that's easy to install, gives you a 0.78:1 underdrive or overdrive, can improve your fuel mileage up to 20 ...This is the factory output shaft for all TH400/NP208 and TH400/NP241 systems as well as TH400/NP205 systems from ’85-90. How to use with Offroad Design 203/205 doubler: Use TH400/NP208 or TH400/NP241 adapter HERE . Drill/tap six bolt transfer case pattern into face of NP203, plug up stock holes and make a tab to hold down the idler shaft.***FOR TH400, soon C4 & 4L80E overdrive trans @ $6500.00 complete with one ratio of choice or $11,500.00 with 5 different ratios. Attachments. underdrive CLIP_FNL.jpg. 58.4 KB · Views: 3,981 underdrive on trans.jpg. 272.1 KB · Views: 1,958 Reply. Robert Mason Well-Known Member. Joined Oct 1, 2003 Posts 754 RDC Crypto 654

The Insider Trading Activity of Forkey Joseph Norman on Markets Insider. Indices Commodities Currencies StocksApr 24, 2015 · The 4L80E is just a longer, heavier, overdrive version of the TH-400. It uses the same first three gear ratios but adds a 0.75:1 overdrive. This means that with a 3.55:1 rear gear, the overdrive drops the effective rear gear ratio to 2.66:1. This makes the first question more about torque converter selection. This is the factory output shaft for all TH400/NP208 and TH400/NP241 systems as well as TH400/NP205 systems from ’85-90. How to use with Offroad Design 203/205 doubler: Use TH400/NP208 or TH400/NP241 adapter HERE . Drill/tap six bolt transfer case pattern into face of NP203, plug up stock holes and make a tab to hold down the idler shaft.towing with 700r4 or th400. Currently I have a th350 in my truck and it does ok when towing, just need more first gear and/or lower rear end gears (which are getting swapped to 3.73 or 4.10 depending on the tranny i choose). I already have a 700r4 that just needs rebuilding and I am going to go with the full B&M transkit for it.anyone have any experience with a gear vendors setup? i like the thought of keeping my th400 but have overdrive. at $3100 it wont be happening till later this year if at all. nothing needs modifying except rear drive line length. is there a way to justify this over 4l80 swap? it'd be nice to hear from the knowledge base here on the matter, maybe i …They are pricey new, but they're tough and can be installed behind many different transmissions. 71 SS 454 TH400 2.74 1st gear GV Overdrive 3.55 Gear SC&C Stage 11 QA1's 4 Wheel Baer Brakes AGR Box Straub SR .630 .612 lift 240 256 [email protected]. 83 K20 454 TH475 NP 205 Dana 60 Track Lok Detroit Locker Rear.GEAR VENDORS provides an overdrive product to race cars and trucks up to 2,000 hp. This product is particularly well suited to the special demands of Drag We...Apr 13, 2021 ... 1970 Chevy El Camino, Blue Print 350/420HP, TH400, Gear Vendors OD, Posi 3.73 Video #2 Inside Tour. Scott Cerreta•7.9K views · 25:53 · Go to ...Oct 15, 2023 ... In this video I demonstrate how I installed my gear vendor overdrive in a 1986 Ford F350 with a c6 automatic transmission ... TH400, Gear Vendors ...But when replacing a TH350 trans, you must either relocate the frame’s crossmember mounting holes to the rear approximately 1 inch or, if your car ever came originally equipped with a TH400 ...This makes the TH700R-4 a prime candidate for a swap into any GM rear-wheel driver as a replacement for a TH350, Powerglide, TH400, or TH200-4R. The TH700R-4 was the first overdrive automatic transmission used in GM cars and trucks in 1982, designated as a Hydra-Matic MD-8 transmission according to GM's RPO codes.

GEAR VENDOR OVERDRIVE INTERNAL PLANETARY SET WITH ELECTRIC VSS LATE TH400 & 4L80. Opens in a new window or tab. Pre-Owned. $1,500.00. transmart4x4usainc (1,302) 100%. Buy It Now. Free shipping. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL . Opens in a new window …

With a TH350 or a TH400, your car would be turning about 3,000 rpm at 70 mph. On the other hand, that 3,000 rpm multiplied by an overdrive ratio of 0.70:1 yields a cruise rpm of 2,100. That’s a...The Gear Vendors under/overdrive is an extremely heavy-duty auxiliary transmission that's easy to install, gives you a 0.78:1 underdrive or overdrive, can improve your fuel mileage up to 20 ...The TH400 has a gear ratio of 3.55:1. This ratio gives the transmission better efficiency. It’s also better for faster speed. A higher overdrive gear ratio, such as that of Powerglide, helps with acceleration. A faster acceleration comes along with consistent speed as well.Hence, th400 has an irregular fluid pan shape, but with a nine-angle, 13 bolt pan design. 2. Overdrive. Th400 is not an overdrive transmission. This is a big difference which Th400 lacks, compared to 700r4. The overdrive feature is fitted to the fourth gear of the 700r4; this offers a 30% increase.You might have heard that high notes can shatter glass. But can you really shatter glass with sonic force in real life? Find out at HowStuffWorks. Advertisement It's opera's equiva...Thinking About A Gear Vendors Overdrive... This would be for my '69 SS with a 496/TH400 with a 3.73 rear. This would be for next year, but I would need to start saving now. Right now at 60mph, I'm turning around 3100 rpm. With the 496 being quite the gas pig, and gas prices being what they are, this modification has been on my mind more …But the TH350 and TH400 three-speed versions (and their two-speed Powerglide cousin) fall short when it comes to highway cruising. The reason for this is the conspicuous lack of an overdrive gear ...

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[email protected]. GEAR VENDORS, INC. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186Reticulocytes are slightly immature red blood cells. A reticulocyte count is a blood test that measures the amount of these cells in the blood. Reticulocytes are slightly immature ...1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL. Parts Only. $575.00. transmart4x4transmissions (1,140) 98.3%. Buy It Now. Free shipping. 15 watchers.The Ultimate in Horsepower Handling and Performance. Get Expert advice about your vehicle. Call us at 800-999-9555. GEAR VENDORS provides overdrive product to racing cars and trucks up to 2000hp and trucks towing heavy RV’s up to 25,000lbs gcvw. Whether you are trying to move a couple tons up a steep incline or moving just a couple thousand ...1023 posts · Joined 2006. #1 · Sep 12, 2008. A good friend of mine just picked up a 66 nova with turbo 400 that is equipped with an aftermarket Doug Nash overdrive unit. It is the weirdest set up I have seen. It bolts to the back of the th400 and has a switch in the car to shift to overdrive. He is thinking about taking it out.This is also why all GM Callaway Twin Turbo Corvettes with …It is a US Gear Dual Range Auxiliary Overdrive unit that bolts in between a Chevy TH400 transmission and your transfercase (6 bolt round). This works, in terms of adding OD to a transmission, like a Gear Vendors unit except this is intended to allow you to be in four wheel drive as it bolts between the transmission and the t-case.700R4. The 700R4 is an improved and upgraded model compared to its predecessors-TH350 and TH400. The GM THM700R4 is a 4-speed automatic-shift overdrive transmission installed longitudinally (front to back) over vehicle chasses. The 700R4’s performance is comparable to the GM 200-4R but sports a lengthier transmission. ….

Hence, th400 has an irregular fluid pan shape, but with a nine-angle, 13 bolt pan design. 2. Overdrive. Th400 is not an overdrive transmission. This is a big difference which Th400 lacks, compared to 700r4. The overdrive feature is fitted to the fourth gear of the 700r4; this offers a 30% increase.Although the Gear Vendor's overdrive unit is bombproof, the 4L80E's .75:1 O.D. is better than the GV's .78:1 ratio. And you would be giving up on the locked torque converter. Locking the converter feels like 5th gear and reduces the fluid temp greatly. In O.D. the final drive is 3.08:1.Essentially a TH400 with overdrive and more rugged internals, the GM 4L85E is the ultimate automatic. When built right, they can handle over 1,000 hp reliably, and best of all, transplanting one ... This is a superior alternative for most cars thinking of going to a Th400. The GEAR VENDORS.78 to 1 ratio allows you to go to a numerically higher rear gear to improve your 60ft. times and get it all back with the overdrive. The reciprocal of our ratio is 1.28 so a car that currently runs a 4.56 rear could go to a 5.84 without loss of top end ... Banner Kit: TH400 Transmission. $99.95 $79.95. Sale. Add To Cart. Got Questions? Give Us A Call 800-708-0087. Master Rebuild Kit: TH400 Transmission.GEAR VENDOR OVERDRIVE INTERNAL PLANETARY SET WITH ELECTRIC VSS LATE TH400 & 4L80. Pre-Owned. $1,500.00. transmart4x4usainc (1,295) 100%. Buy It Now. Free shipping. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL. Parts Only. $350.00.The TH400 has a gear ratio of 3.55:1. This ratio gives the transmission better efficiency. It’s also better for faster speed. A higher overdrive gear ratio, such as that of Powerglide, helps with acceleration. A faster acceleration comes along with consistent speed as well.This ratio is ideal for getting the best speed. If you want to get your car moving fast, get the TH400. And according to Gear Star, 4L80E transmissions have nearly 25% overdrive and are 4 inches longer than the TH400. On the other hand, a higher overdrive gear ratio facilitates faster acceleration. The 4L80E has such a ratio, which is 0.75:1.GV4000 - Gear Vendors TH400 Under/Overdrive With 4" Tailhousing. (0) Write a review. Special Order Item, Contact Us To Order. MSRP: $3074.99 ea. $2794.99 ea. Product #: GV4000. CATEGORY: Complete Transmission. SHIP TYPE: Truck |. Add to Cart. Add to Build List. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Information.TH400. A Gearstar-prepped TH400 (left) and an ATI unit (right). Despite the current technology of today's transmissions, the Turbo-400 remains to be a favorite amongst enthusiasts. ... The 700R4 was released in 1982 as the first 4-speed automatic transmission with overdrive available for GM vehicles. Initially only available in the … Th400 overdrive, Overdrive Conversion Packages; Black Beast Diesel Transmissions; In Stock Ready To Ship Transmissions; SHOP Engines. Ford Engines; Chrysler/Dodge Engines; GM Engines; ... Turbo 400 TH400 Transmission Mild Rebuild 2WD : 9" Tail with Free Transmission Fluid. $2,273.75 Monster Sale Price: $1,849.00. Sale Add To Cart Got Questions? Give Us A …, We'll use our 4.10 rear-axle ratio and the 2.48 first-gear ratio of the popular GM TH400 automatic ... The overdrive can also be used to split gears on wide-ratio split transmissions. The torque ..., This makes the TH700R-4 a prime candidate for a swap into any GM rear-wheel driver as a replacement for a TH350, Powerglide, TH400, or TH200-4R. The TH700R-4 was the first overdrive automatic transmission used in GM cars and trucks in 1982, designated as a Hydra-Matic MD-8 transmission according to GM's RPO codes., Dec 26, 2016 · The 4L85 (left) is 50 pounds heavier than the Turbo 400 (right), but the overdrive is a benefit we feel overshadows the extra weight issue. Speaking of weight and dimensional differences, a Turbo 400 with no fluid or torque converter weighs between 135 and 140 pounds. Conversely, a 4L85 weighs 185 to 190 pounds when weighed with the same ... , These overdrive packages add up to a much improved driving experience. The engine is less stressed on the highway, which means you’re less stressed, and the ride is quieter with lower engine speed and less fuel consumption. Swap that Powerglide, C4, TH400, 700R4 or TH350 with one of our Packages., During a week like this, with record cold temperatures across a large section of the US, telecommuting sounds almost as enticing as a trip to Fiji. Now that’s a possibility for mor..., Gear Vendors review. As of 9/21/2012 I completed the install of the under/overdrive gear vendors unit. Once I received the box and looking at the unit it's pretty sweet looking piece and I was excited to get it installed. Now just so everybody knows I'm not a mechanic just a weekend warrior that's learning as I go., The big difference between the 700 and 200 is the first gear ratio. The 700 is 3.06 and the 200 is something like 2.7. This means a lot less of a torque drop unless your engine is built for it. I'm still evaluating the difference from the TH400 to the 200. I'm not convinced it was a good decision., GEAR VENDOR OVERDRIVE INTERNAL PLANETARY SET WITH ELECTRIC VSS LATE TH400 & 4L80. Pre-Owned. $1,500.00. transmart4x4usainc (1,295) 100%. Buy It Now. Free shipping. 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL. Parts Only. $350.00. , Automatic 3-Speed TH 375 and TH 400 9″ Tailhousing.Replaces 9 1/2″ tailhousing.60’s-70’s cars with 27 or 32 spline output shaft and mechanical speedometer. Provide output shaft spline count when ordering. , This Monster Powertrain Package is complete with all the features you need for a reliable Chevy 383 & Automatic Overdrive TH400 Transmission from a researched and developed combination of components. INCLUDED FREE - No Fault Warranty A 1-time no questions asked repair or replacement. Covers Shipping, Freight claims, Installation errors ... , TH400 Transmission, Rebuilt TH400 Transmission, TH400, Monster Transmission offers free shipping on TH400 transmissions, also offering completely rebuilt TH400 transmission and turbo 400 transmissions, TH400 rebuild ; 0; 800-708-0087 ... Overdrive Conversion Packages; Black Beast Diesel Transmissions; In Stock Ready To Ship Transmissions; …, February 26, 2014, 09:44 AM. Since there is a distinct lack of information out there on the Doug Nash Enterprises Dual Range, or DNE2, I'm going to try to put everything I have gleaned on them in one place. And document reviving this one that I got from SuperBuickGuy "recently" . These 2 terminals connect to the reversible 12v motor by …, Re: Gearventor overdrive Munro - try going to their website and clicking on 'Contact Us.' You can submit info directly via the site. The email address is the one you have in your post. I have had GV with my TH400 for 10 years and love it. Don't expect a lot of overdrive (.78) but more of a keeping the engine in the power band as they advertise., 1965-UP GM CHEVY TH400 TH375 GEAR VENDOR OVERDRIVE BRAKE TYPE HOUSING WITH SEAL. Parts Only. $575.00. transmart4x4transmissions (1,140) 98.3%. Buy It Now. Free shipping. 15 watchers. , I have and am very happy with the 400 turbo in my '39 350 powered p/u but as I get it more and more dependable and now have up-graded the suspension, brakes and steering I would like to consider overdrive for highway trips. What are the options out there and would like to hear opinions., These overdrive packages add up to a much improved driving experience. The engine is less stressed on the highway, which means you’re less stressed, and the ride is quieter with lower engine speed and less fuel consumption. Swap that Powerglide, C4, TH400, 700R4 or TH350 with one of our Packages. , The kit, which retails for $2,495.00, includes a TH400, Streetmaster torque converter, trans mount, dipstick, transmission cooler, and a case of fluid. Follow along as we swap out the old trans ..., anyone have any experience with a gear vendors setup? i like the thought of keeping my th400 but have overdrive. at $3100 it wont be happening till later this year if at all. nothing needs modifying except rear drive line length. is there a way to justify this over 4l80 swap? it'd be nice to hear from the knowledge base here on the matter, maybe i …, The 700R4 Conversion Kit includes most everything you will need when attempting a conversion, minus the driveshaft work. This Conversion Kit is often used when converting from a TH350, TH400, or Powerglide transmission to the 700R4 transmission. Monster Sale Price: $549.99. Buy in monthly payments with Affirm on orders over $50., Oct 21, 2016 · Typical 4L80E converter charge pressure during high load is usually around 100 PSI, with a maximum line pressure of 180 PSI. 100 PSI of converter charge pressure generates 89 pounds of rearward thrust on the overdrive planetary gearset, forward clutch housing, and mainshaft. Unlike the TH400, lube pressure doesn’t raise rearward thrust. , Cons: it’s really heavy (110 pounds MORE than a TH400) and has the highest HP loss of all transmissions, can easily be built for 1,000 HP. 5-6 grand built “right”. -Gear Vendors overdrive. Cons: Gotta beat the floor up a bit, I think it’s 60 to 80 pounds, bad drive line angles. Around $2,700.00., since your Overdrive of 3.20 would only be when you are on the Hwy ! If you look at my Sig you can see I like a 3.70/3.73 Gearing with my TH400 for Street/Hwy/ Strip use = C. I have a 3,500 to 6,500 Stall Converter that is Customized to my Engine details / Trany / how I use my Car, We'll use our 4.10 rear-axle ratio and the 2.48 first-gear ratio of the popular GM TH400 automatic ... The overdrive can also be used to split gears on wide-ratio split transmissions. The torque ..., The car uses a Rossler TH400 three-speed automatic connected to a Gear Vendors overdrive. The tire is 36 inches tall (static—it grows 2-inches in the traps), and the rear gear ratio is 4.56:1., Mar 27, 2011 · 8509 posts · Joined 2009. #1 · Mar 27, 2011 (Edited) I've been doing some research and I'm thinking seriously about installing one of Gear Vendors Overdrive units on the back end of my Turbo 400 that's in my 55 Sedan. Currently, the rpm is over 4,000 when cruizing at 65 - 70 mph, I'd like to get it down in the 2,200 - 2,500 rpm range at 70 ... , These overdrive packages add up to a much improved driving experience. The engine is less stressed on the highway, which means you’re less stressed, and the ride is quieter with lower engine speed and less fuel consumption. Swap that Powerglide, C4, TH400, 700R4 or TH350 with one of our Packages. , We slow the engine down about 30% with an overdrive, but we don't see 30% economy increase, more like 10%. If your big block gets 10 MPG normally, it'll get 11 with overdrive. If you drive 5000 miles per year @ 10mpg = 500gal., Learn about upgrading to the TH400 transmission and how it can improve performance and reliability on your 1963 Oldsmobile with our Classic Car Member Q&A. ... although I would suggest going one step further and adding overdrive with the use of a 700r4 or 4L60 transmission. The original Slim Jim transmission is a relatively narrow …, Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors.These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse.. The Turbo-Hydramatic or Turbo Hydra-Matic …, The 4L80E is just a longer, heavier, overdrive version of the TH-400. It uses the same first three gear ratios but adds a 0.75:1 overdrive. This means that with a 3.55:1 rear gear, the overdrive drops the effective rear gear ratio to 2.66:1. This makes the first question more about torque converter selection., They are pricey new, but they're tough and can be installed behind many different transmissions. 71 SS 454 TH400 2.74 1st gear GV Overdrive 3.55 Gear SC&C Stage 11 QA1's 4 Wheel Baer Brakes AGR Box Straub SR .630 .612 lift 240 256 [email protected]. 83 K20 454 TH475 NP 205 Dana 60 Track Lok Detroit Locker Rear., Find Parts and Accessories th400 overdrive KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1,000 - Use Promo Code: CARCARE Vehicle/Engine Search Vehicle/Engine Search Make/Model Search