It seems like the trans will not down shift. Like its stuck in d4. I have to put it in 1 or 2 to start off in and then shift it to d3-d4. Also 1 and 2 are the same gear and d3 and d4 are the same gear. What could be causing this. Drives fine other than that. S light stays on.

 

Place your car year and model in your signature line.

See DIY page and get your auto trans codes. It's same procedure as engine codes, however the S light will flash the codes, rather than the Check Engine Light. Codes will provide an indication of possible solutions.

good luck