Originally Posted by Goaterguy
You can see in the picture a sample of oil after 31k extremely well cared for miles vs. new.
To me it doesn't really look that bad but I have never towed anything and remember, this oil is supposed to last for the life of the vehicle. This coming from the same guys that told us that we should change our engine oil according to the on board monitor, and we all know how that worked out!
My manual states to change the tranny fluid at 50K for severe conditions or 100K under normal conditions. No where does it indicate lifetime.
That said, I've had the trans fluid on my Dodge Caravan changed every 40K per dealer recommendation (that's more frequent than the book says). What I don't get is both the dealer and Firestone charged me over $100 each for a transmission flush. Just yesterday I received a val-pak coupon in the mail for a local shop that says $9.99 for a transmission fluid change (no flush), including fluid! Maybe there are hidden fees with that, but both other service shops charged over $50 for the fluid alone. I'm sure the quality of this local shop's trans fluid isn't top quality, but when my XL7 needs a transmission fluid change next time, it will be worth it to me to buy my own Royal Purple or the like and let a shop like this change it for me if they will do it for $10.
Car repairs is such a crap-shoot! I've always been able to change my own oil, but think I'll start to learn to do a few other things as well. Might even brave the tranny change when it comes to it. Think I'll do it about 50-60K on the XL7.