Quote:
Originally Posted by izzy_Britton
Cline: What changed in 07 ?
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2007 is a crazy year because the GMT800 & GMT900 were sold congruently.
2007 GMT800 trucks used the same 4L60E that was used for the 2006 model year.
2007 GMT900 trucks used a Input Speed Sensor(ISS) equipped 4L60E which is required for "Controlled TCC Slip" for the then new "AFM"/Cylinder Deactivation feature on full size trucks.
The first ISS 4L60E were built exclusively for the GMT360 platform that had the LH6 5.3L AFM engine for the 2005 & 2006 model years, The 2006 Trailblazer SS used a ISS equipped 4L70E.....Even though the LS2 didn't have AFM, But the TCM still required the ISS signal.
YOU CAN swap ISS 4L60E's in place of Non-ISS 4L60E's with no issues.
YOU CANNOT swap a Non-ISS 4L60E into a Platform that requires it.
In late 2008 (2009 model year) GM eliminated the 3-2 Shift Solenoid making these units unusable in earlier model years without Valve Body, Plate, & Harness changes.