Diff Breather and trans fluid change




Last summer, I had some warranty work done for a leaking rear differential , where they replaced an axle seal, as well as a pinion seal. Since I was unsure of the causation, I asked them to change the breather in the diff as well. About two weeks ago while inspecting under the car, I noticed the rear diff was leaking again, so I checked the rear breather and saw it had not been replaced and was original to the car, covered in paint from the diff. for about nine dollars I bought what is called a diff breather, wiggle valve cap, I popped the old one out and popped the new one in and after about a week of driving, I haven’t noticed any new fluid. I did just top up the fluid today because it was a little bit low so I will monitor and report back if this fixed it. Stuck breathers can create issues on axles and diffs so make sure to check them.
I also did a transmission remove and replace of the fluid two times this weekend. It had been about five years and 20 to 25,000 miles since it had been done, last at the dealer. I’ve been having a little bit of hesitation at low speeds so figured it would be a good time to check up on the transmission. The hardest part of the whole process is getting the car level on jackstands and removing the under body panel. There’s plenty of videos out there on how to do this so I won’t go through that but here are some pics. I’ll report back after driving through the week, but the initial drive felt immediately smoother.
I did also change my transmission mount because I figured if it was bad I wanted to do it while I was under there. That was last changed in 2021 at the same time the transmission fluid was changed, but there was no cracking or any visual indication that the mount needed to be changed this time..
Overall the fluid was dirty but still had a blue hue
Not much debris on the pan, no sparkles
Magnet captured the fines. Very silt like and no size to any of the captured material.
Last edited by Baltistyle; Yesterday at 11:07 AM.


