where is mark kovalsky when you need him, the trans tech...I would want to know what is wrong before I started throwing money at it.
I'm not a trans tech and never have been one.
I've seen conflicting information on this problem. What gear is not working?
It is supposed to shift 1-2-3-5-6. Sixth gear is overdrive. There is a fourth gear that is rarely used. Fifth gear is 1:1. You may need a scan tool to be able to tell which gear is being used and which is not.
If it shifts 1-2-3 normally then the overdrive solenoid and clutch are working fine. Second gear is first gear with the overdrive clutch applied. The solenoid CANNOT work in second and not work in sixth.
If it shift 1-2-3 normally and won't shift to overdrive then I think the problem is in the tunes, not the trans.