chato5551

so my trans went out and need another one but I was wondering if a can install an older one from 99-07 since they are the same 4l60's and if so do I have to move the pins?

clinebarger

A 2008 Silverado 4l60E will have a ISS sensor that '99-'05 4L60E's do not have, Certain 2006 & 2007 models do (Mostly GMT-360 Platform & the 2007 GMT-900 like you have)

2006 & 2007 GMT-800 DO NOT & never had ISS Sensors installed, But some did get built that could accept the ISS, This requires pulling the pump, Installing the sensor & harness.

chato5551

Wow so basically internals is different
Cause have both tranny's laying around (4l60e(99-06) and (08+) and looks the fiscally the same

07NBSChevy

iTrader: (1)

Due to the wiring harness 2007 and 2008 NNBS 4L60E models interchange, all 4L65/70E will work as well. 2009-2013 use a different internal wiring harness, and older models like said above, do not have the ISS in the pump housing.