![700r4 corvette servo in used trans 700r4 corvette servo in used trans](https://www.monstertransmission.com/assets/images/700-V-Side-2.jpg)
The amount of torque that this can handle will vary based on year of production, but one website states that the max engine torque is 350 lb-ft with a max gearbox torque of 650 lb-ft. The 60 indicates that the transmission is rated for applications up to 6000 lbs gross vehicle weight (GVW). The L denotes that the transmission is longitudinally positioned. The 4 indicates that it is a 4-speed transmission. When the transmission was renamed to 4L60 in 1990, this naming convention provided a number of key characteristics about this transmission. 700R4 Performance SpecsĪs mentioned, the 700R4 was a 4 speed automatic transmission. This is a much lower ratio than what was common, and provides good acceleration from a stop and is also good for off-road driving. Two of the key reasons for its popularity were the improved fuel consumption and the 3.06:1 gear ratio in 1st gear. This transmission was very popular and considered one of the best of ever produced. At this time, all of the regular 700R4, or 4L60 transmissions began to be phased out, and none are available in that format any longer. In 1993 the transmission became electronically controlled, instead of hydraulically, and the name became 4L60E.įor the purposes of this article, the focus will be pre-electronic control.
![700r4 corvette servo in used trans 700r4 corvette servo in used trans](https://photos.smugmug.com/The-700R4-Transmission/i-HjPcdqB/1/f7e87ccc/XL/DSC00602_zpsc0bae5c8-XL.jpg)
There was a name change to 4L60 that occurred in 1990, although this was essentially the same transmission. There was constant improvement, and by 1987 this transmission was much more robust and reliable. As is expected with all new system, especially with such a major re-design, some design issues were present with the original release.
![700r4 corvette servo in used trans 700r4 corvette servo in used trans](https://mechanicbase.com/wp-content/uploads/2021/08/700r4-Transmission.jpg)
The 700R4 was first introduced in 1982, and served as a replacement to the TH350, which was a 3 speed automatic transmission. This transmission was also used in the Chevrolet Camaro, Corvette, Impala, and many others. Some of the popular trucks it was used in were the Chevrolet Blazer and Suburban and the Oldsmobile 350 diesel. The 700R4 was used widely on both truck platforms and rear-wheel drive car platforms. The development of this transmission was primarily targeted to improve fuel economy, and this was accomplished by a number of modifications, not the least of which was the 30% overdrive capability. This transmission was produced by General Motors, but is also sometimes known by the name Hydramatic. Should I be using thread lock, are the lock washers too thick and pushing away? Is this telling me the temperature of the tranny is too hot that the aluminum case is expanding and loosening the screws? This is getting exhausting.The 700R4 is a 4 speed automatic transmission, with a 30% overdrive in 4th gear. Each time I keep being able to tighten the bolts more. Latest try was 1/4 pure hi temp silicone cut to the gasket. Gave up on the aluminum pan since there is a piss hole at the front side that was blocked with that pan.
700R4 CORVETTE SERVO IN USED TRANS PROFESSIONAL
The professional rebuild screwed us over big time, missing a solenoid that allowed fluid to just churn in the pan which is why we never had good pressures or third and fourth gear, rubber o ring washer not on original filter that probably cavitated the pump, stripped case holes switched to helicoils, which never worked, opened up to the 7/16-20 since it was the smallest thread I could cut from the helicoil thread, opened the pan, punched new holes in a new ATD gasket, still leaked. Is there some secret to getting these stock pans to seal? Seriously, we had one ATD gasket that sealed fine, got another and no dice, got a rubber gasket with an aluminum pan, no good, went to all transmission silicone by permatex, nada. Something else I do is since we get a ton of cores in, we get many with the expensive shift kits already installed so I'll pick through different colored springs for heavier ones to get from a firm shit to a bark the tires shift. used ones from us are 10.00 and I think new ones are around 25.00? We dont sell the new I use a transgo one because there thicker and the stock ones will wear out where the check balls run. Something else I didnt postis a valve body seperator plate. Alot of our cores that come in are recent rebuilds that might have been in a wreck so there usually in good shape. I have no problem using used frictions in my trannies but if it it a customers I am doing at home I use new. The overhaul kit I use usually is a paper/rubber kit and I use good used frictions and tumbled steels. The zpak we dont keep, I buy mine from another company for 60.00 That band in the picture is a good used one for 6.00 The used beast shell is 15.00 or new 35.00