Not much new to say about the venerable 700R4 transmission Chevy by General Motors. Used almost exclusively by Chevy and GM in nearly every circumstance an automatic overdrive transmission was deemed necessary. Other automatic overdrives were available for General Motors cars, their success never equaled that of the T700 and those were eventually dropped.
It was discontinued in about 1992 or ’93 for the computerized version called a 4L60E. Although the design was barely changed except for using full electronic controls. I’m a GM person and without being too biased, would say that the 700 may be the best and most impact-full transmission ever made. I think a lot of people agree with me.
It would be hard to find a good used unit with low miles, as I mentioned they were discontinued in roughly 1992. With that in mind, a rebuilt T700R4 is the obvious choice. I think the cost will surprise you, on the low and affordable side, so bear with me.
I own a mint condition 1988 GMC 1 ton 4 wheel drive pickup (not a duallie) which I bought brand new on Feb. 16th 1988. It only has 94,000 miles on it. I adore my truck, it is not very fancy and has few luxuries except for air conditioning, I challenge any new truck owners truck to out drive my gem, track better, stop better and have the same sold ride control. Ha, Ha!
But that is not my point. When I bought it it had a 3 speed automatic transmission in it, which worked great, but without overdrive it got 10 miles per gallon, period. In about 2000 before I sold my transmission shop of 26 years (sold in 2006), I decided to swap the 3 speed for a T-700R4, I wanted better gas mileage. Turned out to get 15 to 16 on the highway, not great, but what an improvement.
I’ll get more involved in the changeover at another time, suffice it to say it is almost a complete factory bolt in, basically unnoticeable if done right. What I want to mention is how we rebuilt the transmission and why updating it at that time is so important.
After a complete disassemble job and clean up with ultrasonic equipment we got down to brass tacks. We used one grade better than factory original clutch plates (called hi-energy), a factory seal and gasket set, all brand new bushings and bearings, hi-energy band, and an update kit. We installed all upgraded parts, a rebuilt torque converter, an auxiliary transmission cooler and used fully synthetic automatic transmission fluid.
So, my point is not my truck, but the way the transmission was prepared and installed. If you are serious about choosing the right T700R4 transmission for sale and need one fast, we can be very helpful to you and meet or exceed your expectations. Every rebuilt transmission we sell gets the same treatment. Call us anytime for more information because everyday is 700R4 sale day.