01-05 allison valve body

Does anyone know the differences between an 01-05 allison 5speed valve body? And also is there a way to identify what year you have

04.5-05 has a G-Solenoid and different harness.

01-03 allisons dont have the G-solenoid in the valve body
04+ allisons have the G-solenoid. There is an exception...All LLY's have the G-solenoid, SOME 2004 LB7's had the G-solenoid (but it didnt do anything). Probably just an overlap in production; Allison started making the LLY valvebodies with the G-solenoid a bit early and decided to throw some extras into the last of the LB7's.

You can use an LLY valvebody (with the G-solenoid) in any 01-04 LB7 allison without problems. You can use an 01-04 LB7 valvebody in an LLY, but you might get a check engine light/set a code unless you reflash the TCM with an 01-03 Operating system (that does not ahve the G-solenoid enabled)

Okay thanks I've had a problem with the allison in my truck for a while now and I was just wondering if mabe I was running the wrong Tcm . I have an 06 6 speed with a 5 speed valve body, nsbu and destroked stand alone.

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