Originally Posted By: IndyIan
Originally Posted By: JMJNet
Why do you think it needs changing? T-Case is a close system.
Well, the fluid is accumulating particles from wear with no filter system, so changing it never hurts. Have you never drained a diff or transmission? Lots of ugly stuff comes out on the initial draining, or is stuck to the magnet.
I was always surprised how dark my Trackers front diff fluid got over 30-40k miles even though its just coasting along 90% of the time.
Lifetime fills means the manufacturer is pretty sure the dirty fluid won't cause a failure within the warranty period, but if you want to go triple that far without having a problem, changing the fluid is the way to do it.
I am asking specifically to the OP for his specific case, I know about no lifetime fluid, etc.
Look at my signature, I have a 4WD Suburban Diesel.
I changed the t-case fluid but it was more than 10 years old when I changed it after I purchased it with no history (fire chief truck).
The t-case fluid was not that bad and it is spec'ed for trans fluid not too difficult to find.
The diff was worst but it is a RWD truck.
OP's car is barely 3-4 years old and he/she did not post the mileage of the car.
Just curious to see if he perceived any issue or is it because of mileage accumulation.
I will change the trans fluid more often than the t-case fluid unless it is abused or bought used cars with no history.