Mechanic uses a scanner to test the trans. module to find problems within the system. Most repair shops can run the test, but a transmission mech. is more than likely your best bet! Parts stores dont have this capability.
Bring your car to my shop and we will diag it, and we will tell you what need to be done, Its is Possable that the transmission need to be rebuilt So stop in Bills On Broadway Auto Repair, 4326 Broadway Grove City Ohio 43123 Ph 614-539-4870