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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Apr 2000 Posts: 247 Member | | Member Joined: Apr 2000 Posts: 247 | 700R4 is the same thing as a 4L60E, they just use a new name, plus it is electronically controlled (the meaning of the E in the name). 4L80E is the TH400 with an overdrive gear on it. You can think of the 700R4 (or 4L60E) as a TH350 with an overdrive gear. It's an oversimplification, but it makes it a lot easier to understand for most people.
Use the 700R4 for most applications. IF you REALLY do a lot of towing or have a heavy vehicle use the 4L80E. | | |
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