Thinking
The carbon fibers are suppose to be the way to go. The material is spaced vs solid. This is suppose to be the advantage. Theory is the discs won't load up or fill will crap over time. But uknow, my discs only clogged once and slipped on right and left turns. They did this around 100,000 miles because I didn't service the rear end in the truck yet for the first time (yea, I took the lumps on that). The clutches were slipping and worse, the truck couldn't be driven over 55mph on the e-way. The rear would shake the truck off the road...it was bad. I had know idea that was the rear end at the time. The fluid had broken down. After the first service, the truck smoothed out they never noticeable slipped. But I kept up on it also after that neglect...changed it out every 60K. But Mann, I still can't believe how bad that shook the truck at 55mph...I mean it shook the truck from side to side, no vibration...it was a shake lol.
Anyway, the rear end is bad on the 98 now. I can hear the axle grinding away now. Bad bearing/race I expect, digging into the axle. So, not sure if I'll rebuild it or find a newer set up from the yard. A rebuild seems cheaper and a better way to go really. Anyway, 350,000 out of that rear end. Even after the abuse lol.
Anyway, the rear end is bad on the 98 now. I can hear the axle grinding away now. Bad bearing/race I expect, digging into the axle. So, not sure if I'll rebuild it or find a newer set up from the yard. A rebuild seems cheaper and a better way to go really. Anyway, 350,000 out of that rear end. Even after the abuse lol.
Senior Member
Joined: Dec 2015
Posts: 23,191
Likes: 8,620
From: Utah
Mine still works in the Stang, but I am pulling axles, replacing bearings, etc. So I think I will do it while I'm there. Back before I knew much, I had the diff gone through when I went from 2.73's to 3.55's. They, unbeknownst to me (and without my consent), replaced all kinds of crap in there and I had to foot the bill for it. Kind of pissed me off, and today I would have thrown a fit - but when you're 19 and don't know much.... you just say "OK". Anyway, it may have already been re-clutched, but I'm not sure.... and that was about 23 years ago now.
The reason for that story is because I am not having issues.... just a preventative measure.
The reason for that story is because I am not having issues.... just a preventative measure.
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,519
Likes: 7,630
From: MI
Also, the plate that breaks isn't part of the cross member. It's a separate plate sandwiched between the trans and the mount. This is the plate that connects to the exhaust Y...and reason why the exhaust manifold studs break when the mount goes bad.
Last edited by Jbrew; Jun 28, 2018 at 12:41 PM.
Not a problem. I'll look around and see what I can find. I'm sure there is a good write up out there specifically for the 9.75
Senior Member
Joined: Dec 2015
Posts: 23,191
Likes: 8,620
From: Utah
White, I got under mine the other day and realized my crossmember had cracked and the shop that did the trans welded plate to it so I have to replace the cross member too if I want good alignment.
Ohio, what tools did you need to rebuild it? At 250k I'm pretty sure the "limited" part of mine is no longer with us.
Ohio, what tools did you need to rebuild it? At 250k I'm pretty sure the "limited" part of mine is no longer with us.
Last edited by white89gt; Jun 28, 2018 at 12:46 PM.
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,519
Likes: 7,630
From: MI
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,519
Likes: 7,630
From: MI
Not sure what the E-lock is, have an idea, but I may figure that out here in the next few months going over options. Keep planning to work on the body, but the header broke in the back (passenger side). Have to fix that, they have been trouble for the last 10 years. New it was coming. Evaluting the fix tomorrow. The rear end and u-joints are next. Then hopefully back to the body, IF nothing else breaks on the old fart lol. Maybe get some body work accomplished before winter. Purchased a 12 X 20 enclosure for blast and paint. A portable deal.
Senior Member
Joined: Dec 2015
Posts: 23,191
Likes: 8,620
From: Utah
Yeah, that video made me decide to do it. I thought I'd have to pull the diff out, etc. I didn't want to mess with all of that noise, but that video makes it look pretty simple.