Trans Tune for hard downshift [SOLVED]
1 Answers
I have 2005 Lexus ls430. When stopping, it downshifts hard at about 4 mph. The fluid is dark. Will Sea Foam help?
Asked by Ty B. In South Carolina
Official Answer
Thanks for the question, Ty. Can’t say for sure, but Trans Tune might help.
Fluid condition plays a strong role in shift condition and timing. Best bet is to try Sea Foam Trans Tune as a pre flush for 50-100 miles and see if shift condition improves.
If the shifting improves with Trans Tune, flush transmission, and then use Trans Tune as a fluid conditioner.
However, there are a few repairs that I see that are pointing to PCM replacement due to a shorted shift solenoid driver. If condition isn’t improved with Trans Tune, the vehicle should be diagnosed by a professional technician.
Answered by Jim D. TECH
Jim D.TECH
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