700R4 & 4L60E Automatic transmissions specialists - ProBuilt
Transmission Parts
Transmission tech talk
Links & Resources
How To videos
Torque Converters
Welcome to 700R4 - 4L60E
Hello, I see that you were most likely recommended by someone to come here, and I thank you for stopping by 700r4L60e.com/pro-built.net. Here you will find the latest in Heavy Duty & Performance parts available for your GM 700R4's & 4L60E's transmissions.

With 31+ years of experience (in HD & performance automatic transmission rebuilding), I think that I can provide the technical information needed to assist you in building a Heavy Duty or Performance transmission yourself, or with the help of a competent builder.

For the last few years, I have been concentrating on the problems of 700R4's & 4L60E's, and have come up with some "solid" solutions. With the help of Trans-Go (Reprogramming kits, No Yo-Yo steel front pump rings, accumulation products, and technical knowledge), Borg Warner (Hi-Energy 3-4 clutches, & Hi-Energy 2-4 band), and General Motors (Viton seal for the input to output shaft, eliminating rear planet failure due to lack of lubrication, and their Turbulator low-drag steel & quick clutch release technology). I thank you.

If you are "tired" of the 1-2 part throttle (slam, bang, harsh, or violent) shifts of your present 700R4 & 4L60E transmission, then you will like my Performance oriented 700R4/4L60E's. They offer nice part throttle 1-2 & 2-3 accumulated shifts with the shifts getting firmer with more throttle.

All of these factors have contributed to these units holding up to 550-575 HP for the Street/Strip 700R4 & 4L60E and 625-650 HP for the "Limited" Street 700R4 & 4L60E, (that is with using a 10" or smaller diameter torque converter of high quality). These transmissions come with a one year warranty.

If you are looking at building this transmission 700R4/4L60E yourself or having a competent builder do it for you, then I offer a very complete rebuild kits. These kits use the same parts that I use in all of my Performance 700R4 & 4L60E buildups, including the Trans-Go Performance Shift kit with the "proven" accumulation setup.

I have introduced the 700R4/4L60E Updates in the Catalog section, there are a few new (but necessary) products that will make the 700R4/4L60E a "user friendly" unit.

The torque converter that I use & recommend for all 700R4 & 4L60E transmissions, is the Precision Industries 9.5" torque converter with lockup. They come with a "two year" warranty and a free stall change if desired or needed, and are worth the extra money, in "trouble free" reliability.

I use Continental torque converters for all other Chevrolet, Ford, & Mopar applications. 

As of the last couple of years, I have been limiting my transmission building to 700R4's & 4L60E's, but by request, I re-introduced the TH350 & the TH400 in HD, Street/Strip, & Limited Street/Strip Only, at the first of the 2004. 

As stated above, I carry a complete line of HD & Performance parts, along with Trans-Go Shift kits & Performance Shift kits for your Chevrolet, Ford, & Mopar automatic transmissions. If you have any questions feel free to contact me at (800) 776-3288 Mon-Sat 11-6 PST or E-mail us

Copyright © Probuilt Automatics - Website Design by Primeaus.com