You have to pull the bearing caps and nuts/lockwasher outside and the 4 inner bolts. Pop it apart inside and then slide it out to the inside after removing the stabilizer links. Mine were only a little bit noisy but they were flinging grease out of the outer boots. Take your time removing the...
I replaced mine around 200k Jeff. I just ordered from RA. It's a pretty east job by rotating the steering while working on it. IIRC you have to pull the stabilizer links so you might buy new ones of those while you're at it because you'll wind up destroying the old links.
Sounds to me like TCM as well but the brake system code is making me think different. You might get a better answer from @THEFERMANATOR as he's very knowledgeable about these Allisons
Sorry to say, but nobody here wants to get into a conversation that involves deleting any factory pollution control items. For obvious reasons. Lots of us were enthusiastic about all that around 15-20 years ago but in light of today's eee pee eh surveillance it's not a good thing to discuss or do.
Duckduckgo is quite popular and a very good alternative that doesn't track your searches, but lately the owner went a bit 'woke' over the Ukrainian situation and many have alternatively been going over to Brave instead.
What ever happened to the "miracle" oil filter from amzoil that let you go on the same oil for a gazillion miles if you just changed the "miracle" filter every quarter of a gazillion or some such?
The odds of having to replace said injector in less than 300,000 miles is pretty much zero if he does any kind of decent maintenance. MANY are way past that... My old LBZ is almost at 400k on original fuel system.