Quote:
Originally Posted by Bob B.
Transmission control modules on the 6L80 and 6L90 and mounted on the valve body, and have to be programed to the truck. Dealers and some of the better independants shops can do this. I suspect the wild quotes you got are from shops that know they can't handle these transmissions so they sub them out to the nearest dealer and pad the bill. Or they just don't want the job. The fleet I work for has had very good luck with the 6L90.
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The independent shops will not warranty the work unless you take it to the dealer to have the computer flashed. Several places recommended taking the old computer out and clearing the codes and put it in the new transmission. If you do a swap.
The engine knows what trans its talking to and if you swap computers it glitches without a reprogram.
I have talked to many shops about the 6l90 and most dont even want to touch it.
Its probably going to have to be a 4l80. They are a solid unit.
And 4 gears is plenty for a street truck. Now some have 10 gears in the future they may have 19. 15k to rebuild.