boney31

hi guys i have search hard for a solution to my prob but i cant find what im looking for so here goes.... i have a sc400 auto trans when im driving with o/d off my car rides super smooth but doesnt down shift with the o/d on it thumps or clunks very hard into 3rd gear it seems to downshift as soon as the gear changes. has any had this prob an what was your solution. this only started after i changed out the mufflers an clean throttle body. all 3 new mounts an new tps no change. i drove around the other day with o/d off at about 40mph an hit the o/d button an the thump hit instantly an car downshifted felt like it tried to shread my tires. any ideas would be great please help me other than that this car is awesome

good2go

iTrader: (6)

I believe if you search here you will find references to tranny shifting issues related to the adjustment off the tps.