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Sep 6, 2016 · Gear Vendors is an aftermarket, bolt on overdrive for the TH400 (and many others). Not the least expensive route but seems to be very dependable and strong. You should have plenty of room for this without any cutting also. Gear Vendors under/overdrive auxiliary transmissions Hot Rods, GM 3-Speed Automatic Performance Car/Street Rod. That's why I'm interested in the GV TH400 overdrive. Solves the high RPM on the highway problem and improves racing performance over just running the TH400 alone. All that and the TH400's renowned durability is retained. A 700R4 feels like a step in the wrong direction, especially when I already have a good TH400 in place.Regarding trying 3.08's before an overdrive, consider how much time will be spent at highway speeds. I have 3.07's behind a low-rpm, torquey 454 and TH400. Traffic has gotten so bad in the last few years that I drive on the highway only about 50% of the time, which is the only time lowering rpm's is relevant.Tighten the eight nuts and take the driveshaft with the new yoke (included) to the local driveshaft shop to be shortened (as per the instructions). Plug in the electronics and fill the overdrive with the recommended lube, and you are ready to drive. All trucks, rv’s, and vans have clearance for the overdrive but some cars and street rods can ...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.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 …Upgrading TH400 to 4speed with overdrive - Gear Vendors? 1967 gto gear vendors upgrading to 4 speed automatic. Jump to Latest Follow. 19K views 23 replies 6 …Description. Automatic 3-Speed TH 400 4″ Tailhousing. Replaces 4″ tailhousing. Small block and Big block cars. Additional information. Product ID. 11184. Weight. 0.06 kg.Description: TH-2004R 4 speed AT/Overdrive Transmission Kit- Rated for 700 HP (bolts directly to Pontiac blocks with no adapter plate) ... Description: TCI TH400 B.O.P. Super Street Fighter Auto Shift Transmission 4" Tail Shaft-Without Trans Brake Item #: TCI-211305. Condition: New. $299 handling fee will be charged in the cart and covers all ...GM 3-Speed Automatic Truck/Motorhome. With the GEAR VENDORS dashswitch in “auto” you will have automatic overdrive just like the vehicle came with a factory system. The GEAR VENDORS will shift on and off without attention of the driver and can be used while towing up to combined weights of 30,000 lbs. An interactive floorswitch is …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 ...Rockville, Maryland is one of the best places to live in the U.S. in 2022 for a family-friendly atmosphere and easy access to Washington, D.C. Becoming a homeowner is closer than y...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. 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 ... GVW or Gross Vehicle Weight. This name change was necessary as it made readily identifying the transmissions easier. This was also the year an early introduction of the 4L80-E transmission, the successor of the Turbo 400 Transmission that has overdrive, was made. The TH400 transmission is an electronically-controlled, heavy-duty version of a ...The TH400 ( Figure 1) has four endplay tolerances (NOT to be confused with clutch clearances) that should be examined and corrected during repair. However, GM’s published rebuild procedure only references two of them! With two endplay tolerances being ignored, you can imagine why these meltdowns are occurring. Figure 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 ...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 T5 offers overdrive for light-duty early Jeep applications that have the Dana 18 or Dana 20 transfer cases. AX5. As found in Jeeps behind the 2.5L, the AX5 can be adapted to the Jeep Dana 300. ... I-III vehicles, the 4L80E is the takes everything awesome about the TH400, and adds overdrive and a lock-up converter to it.Gear Vendors Overdrive - looking for a wiring diagram. This is not Tri-Five specific but I figured I would start here since there are some really smart folks here. I'm doing a rewire on my friends car with a TH400 and a GV overdrive. There is nothing wrong with it but this car has a lot of accessories that were added on over time.Turbo 400 4x4 on sale with Free Shipping, Now offering TH400 4WD, TH-400, Monster 400 Transmission, heavy duty Th400 and heavy duty Turbo 400 with new lower prices 0 800-708-0087Learn 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 …Mechanical Overdrive on TH400. I have a mechanical overdrive that repl1023 posts · Joined 2006. #1 · 1968 Chevrolet C10 Transmission - Hauling Ass On The Highway. California Performance Transmission Gives You An Overdrive Gear Without Using A Computer. Calin Head Writer Jun 01, 2007. See All 36 ...Feb 15, 2011 · I've been asked several times about seperating the overdrive. At this moment I don't want to seperate it. I don't have the tail piece for the TH400 and dont want to deal with making that functional again without the overdrive. Also, we would be interested in trading for a BBC supercharger, preferably a procharger. Thanks Paul What you have is basically First gear, First-over, Second, Second-ov Also, adding a GV unit is just one more thing to deal with. I do think they make a very high quality product but is still adds complexity. But, if you want to keep the TH400 for any reason, I totally get that. 1968 Camaro SS “Clone” with Blueprint Engines 355. Muncie M20 4 speed, 8.5” 10 bolt / Eaton Truetrac with 3.42s.Feb 11, 2022 ... 13:55 · Go to channel · Gear Vendors Activation in 1970 El Camino with turbo 400 transmission. Scott Cerreta•21K views · 2:38 · Go to c... Gvman without purchase of Overdrive: $69: ShiftBall:

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 ...Not only will an Overdrive Transmission improve your performance, but it will reduce your fuel consumption by up to 33%. We have everything you need to make the conversion from the older TH350, TH400, and Powerglide to the newer Overdrives. If you are looking to go with more than 500 horsepower, maybe the 4L80E is the right transmission for you.Indices Commodities Currencies StocksThe TH400 transmission speaking is a three-speed, automatic-shift longitudinally set transmission constructed durably for long-term use. The longitudinal placement of the …

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.This is a very rare 12,000lb GVW overdrive unit for a short tailshaft TH400 manufactured by Doug Nash Engineering. This one is in good condition.Find ATI TH400 Transmissions and get Free Shipping on Orders Over $109 at Summit Racing! ATI Performance Products TH400 transmissions offer great performance for 400 c.i.d. or larger big blocks. Modifications and options include: * Fully blueprinted and equipped with high-flow lube circuits, increased torque capacity, and ……

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The biggest names in automatic transmissions are here—shop Summi. Possible cause: A currently popular option for additional torque capacity is the 4L80E four-speed.