ATXKJ wrote:
Try changing both transmission filters - there's a drainback valve that's sticky and doesn't hold pressure like it should - new filters should fix that.
Oh and check the oil level when warm, idling and in park.
X2 on filters and fluid.
If that does not fix it, the check valve in the pump is bad. If you go with the SunCoast/Transgo the new valve kit comes with the Transgo shift kit. What sold me on the SunCoast is the billet front cover that gives the little 4 cylinder more flywheel and smooths it out.The Transgo is cheaper than a new pump and helps the shifting too.
PM me if you want the skinny on TCM tunes not ready to release.