TAAT SL-1 tranny
 

Does anyone know if it's possible to change shift points on a 2002 TAAT transmission ?? I am experiencing a tranny that shifts too soon and when it downshifts it bangs on down shift.I discussed earlier and I thought the issue was solved but I guess not. I've tested all 4 of the shift solenoids and all are within the range which I believe was 4.5 and not higher than 5 ohms.The car was neglected with fluid changes and I've since changed fluid twice.the last time I added trany treatment from LUCIS which did nothing but waste $13.00. Again Shift points is it possible to alter them. ?? Thanks

There is no tune for S-Cars so there is no way to get into reprogram the engine or tranny.

Also check input shaft nut, it may need to be replaced.

Taat tranny
 

Can you ellobrate a little more on input shaft nut ?? Thanks

Input shaft nut replacement seems to be related to harsh reverse not early shifting and harsh downshift,from what I have been able to find.