Im wondering if anyone has an idea whats wrong with my truck. I have a 07 TRD OR prerunner with the 4.0 and 5 speed automatic trany with 69k miles. I notice about 3 days ago my truck seams to have started having transmission problems.
When im accelerating easy shifting from 2nd to 3rd my truck starts to shake and clunk almost like hitting a rough piece of road. Also when im cruising on the freeway ~65 to 70 mph and i barely get on the gas my truck down shifts and makes a pretty hard clunk.
My truck doesnt act up at all when its still cold or if i accelerate medium to hard. Also i never had my transmission fluid changed. could that be the problem.