All 700R4's had a 1-piece case like the 4L60E in 93-95 S&T trucks, 93-97 C&K trucks & 93-97 cars. The 700R4 had a 4-pin electrical connector on the driver’s side of the transmission and a cable that attaches to the passenger side behind the 2-4 servo assembly.

To identify the main differences between them: I started from 1982-1992 and some 1993 model cars. The 700R4 is the predecessor to the 4L60E, it is just a hydraulic version and is still valued for hot rod swaps and uses the same gear ratios. Personally it is not fair to the 4L60E series transmission without touching on the 700R4. The maximum torque capacity for each includes:ĤL80-E – 440 lb.-ft. The external dimensions and mounting provisions are identical for each. Each planetary gearset in the 4L80 has four pinion gears, while the 4L85 has five pinion gears. The production-based Hydra-Matic 4L80 and SuperMatic 4L85 transmissions are differentiated by gearset design. Maximum torque capacity for each includes:ĤL60-E – 380 lb.-frt. The external dimensions and mounting provisions are identical for each transmission in the 4L60 family. There are five pinion gears in the 4L65 and 4L70, but the 4L70 has a higher torque rating. Each planetary gearset in the 4L60 has four pinion gears. The Hydra-Matic 4L60/4L65/4L70/4L75 family of transmissions is differentiated primarily by gearset design.

Here is a copy and paste quote directly from the 2019 GM Performance catalog that includes the newest 4L75E transmission. Let us start this with something from the manufacturer itself. Please keep in mind that all model years were a transition from one to another and model years usually start in September of the previous year. This information from is from GM, ATRA (Automatic Transmission Rebuilders Association) and ATSG (Automatic Transmission Service Group) and having been building them since the beginning of the 700R4 in 1982.įorgive me if some of my year data is incorrect, I am shooting from memory.

6 pin planetary 4l60e