The differences between the 700R4 and 4L60E transmissions come from their design and used dates. The 700R4 was used earlier and is mechanically controlled.

The GM overdrive transmission swap has been covered ad nauseam, and to be fair, it's an incredibly straightforward swap for anyone who's even done the most basic of hot rodding—that's why we love it.

I am building a '49 Chevy panel truck with mostly junkyard parts. What do I have to do to use a 700-R4 trans with a carbureted 350 engine? The trans is new enough that it has a lot of wires going to ...

A few months back we detailed the buildup and testing of our street 4L60E trans with help from our trans man Jimmy Galante and parts from Sonnax and TCI Automotive. But that was only half the battle.

The 4L60E is the latest in a long line of durable, high-function GM overdrive automatics that have come our way since the 1960s. The TH350 three-speed automatic had long been a mainstay with Chevy ...