markssho Posted April 12, 2012 Report Share Posted April 12, 2012 Four weeks ago I took the SHO back to the dealer to have the Trans TSB's performed/checked. The Trans wasn't bad, but, occasionally would be annoying. They performed 11-8-21. The shifting is much better, smoother, and it holds the revs much better. If anything, I'd say the shift points are more aggressive and MPG might suffer. If you've not had it done, just tell the dealer what's going on and show him this TSB. I'd definitely recommend it...ha. Link to comment Share on other sites More sharing options...
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