Originally Posted by
tonygg
Never...unless you have an issue with the differential hardware and dismantling is required.
Similarly, replacing transmission fluid with preventative maintenance in mind, can lead to more harm then good. Differentials and Transmissions are in the catagory of "if it ain't broke, don't fix it" category IMO.
Originally Posted by
tonygg
I'm guessing automatic transmission? If I recall, standard transmission is "filled for life".
Any reasoning behind this? I am simply wondering. I did both my tranny (manual) and diff around 50K and the stuff came out pretty nasty, glad I did it. The car seemed to drive a little easier and it greatly improved shifts to go to Mobile1 full synthetic in the tranny.
I would say do it as often as you like, if it is a coupon for free and it is an SRT, get it done for sure...