I just had the fluids in my t-case, front and rear diffs, and tranny changed (pan dropped and new seal) for $160. I would have done it myself but I donÆt have a heated garage and figured it was not worth getting covered in oil. I know that not all the tranny fluid was changed as much is in the torque converter. I just plan to drain and refill the tranny fluid every 30K miles or so to keep it fresh.

I know some have posted here saying that you can do the coolant line flush without a machine by somehow pumping new fluid in while the truck is idling. I personally wouldnÆt do this for fear of running it low.

If you do the drain/drop and refill yourself, go out and buy a pump so you can fill that upside-down fill plug on the tranny.

Or just have the shop do it along with the t-case and diffs. It's money well spent in my opinion.