When did they switch to 4L60e Trannys?

[iwaxmyjimmy]

gm changed name from 700r4 to 4L60 in 91, when they also debuted the 4L80e. A couple years later (93 or 94) they started making them electronic, 4l60E.

700r4/4l60/4l60e/4l65e/4l70e are all the same basic POS.

The E is for a electronic valve body and i cant remember the year of the change but they have removable bellhousings also, makes rebuilding them alot easier. id love to get my hands on one of the new 6L transmissions for my K5. makes the HDs feel alot stronger on acceleration.

 

[BGKYK5]

It's good now.

No 4L60E in 1991 for trucks, just looked in the manual, and it specifies 4L80E or 4L60.

x2 I checked my R/V/P Unit Repair and Service Manuals - only 4L60 and 4L80E.