Carrier Bearing Problem
Thread Starter
|
New User
Joined: Aug 2011
Posts: 5
Likes: 0
Carrier Bearing Problem
What would cause a carrier bearing to push out and tear itself up? Just installed new bearing, drove 15 mi and bearing has moved 2-3 inches towards rear and eaten itself alive. Will have to re-replace but am concerned that it's another issue causing prob and do not want a repeat. Don't understand what would cause the whole drive shaft to shift like that. Please help.
1992 F250 7.3L IDI 5-Spd 4WD
1992 F250 7.3L IDI 5-Spd 4WD
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
The front shaft should be mounted solid(by means of Ujoint) to tranny output, so not sure how the carrier bearing walked off the back? The shaft would have had to move forward? But how? There is no real "load" either way so it shouldn't want to move.
Did it go back in with a bind? Did you install the Ujoint first, then hang the bearing? Did the holes line up with mount?
Welcome to the site.
Did it go back in with a bind? Did you install the Ujoint first, then hang the bearing? Did the holes line up with mount?
Welcome to the site.
Thread Starter
|
New User
Joined: Aug 2011
Posts: 5
Likes: 0
That's what I'm confused about. I don't understand how it could move. Splined slip yoke up front on transfer case, joint u-bolted on rear diff to "cradle" yoke, lined up and bolted to bearing mount. No problem. 7 miles down road the rubber "boot/shroud" was beginning to melt. Got it back home and had separation of bearing and boot. It's possible the bearing was defective and seized AFTER installation but I just have difficulty believing it. It doesn't make sense and with the rapidity of the gross failure, I want to be sure nothing else could cause it to repeat. Don't have the time or desire to have to do it a third time. I'll try to post pics if anyone thinks they could help.
Postmaster
Joined: Aug 2005
Posts: 4,728
Likes: 8
From: Cleveland, TN
No need to change anything... He got it right...
Carrier bearing ....
Thread Starter
|
New User
Joined: Aug 2011
Posts: 5
Likes: 0
No compression/distortion of rubber insulator. Bearing installed by shop as I am not setup to press it on myself. The mech was very careful to get it on the correct way.
Trending Topics
Postmaster
Joined: Aug 2005
Posts: 4,728
Likes: 8
From: Cleveland, TN
You need to host these photos somewhere like photobucket or flickr, then post the link to them here.. We can't see photos on you hard drive....
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Fords to Drive Before You Die
Joe Kucinski
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
Thread Starter
|
New User
Joined: Aug 2011
Posts: 5
Likes: 0
Posting Guru
Joined: Feb 2010
Posts: 2,006
Likes: 2
From: CASA GRANDE AZ
check all of your mounts , tranny and motor , and cross member bolts , and also check the transfer case to see if any thing slid back and pushed against the bearing ! check your rear end also and see if all the u-bolts are still tight and it did not move forward !
Postmaster
Joined: Aug 2005
Posts: 4,728
Likes: 8
From: Cleveland, TN
Dang!!! Only three things I can think of that would cause that,
(1) wrong bearing (as in center wrong size (allowed bearing to move))
(2) Bad trans and engine mounts (not likely but possible)
(3) defective bearing (locked up)
I don't have one out to inspect it but I did go out and look at mine, and checked my NAPA web site, and don't see any difference as in a front or rear to the bearing.
I know this is no help but maybe it will get it back to the top for sharper brains, and eyes to see it..
(1) wrong bearing (as in center wrong size (allowed bearing to move))
(2) Bad trans and engine mounts (not likely but possible)
(3) defective bearing (locked up)
I don't have one out to inspect it but I did go out and look at mine, and checked my NAPA web site, and don't see any difference as in a front or rear to the bearing.
I know this is no help but maybe it will get it back to the top for sharper brains, and eyes to see it..
Tuned
Joined: Apr 2011
Posts: 464
Likes: 5
From: Redmond, WA USA
Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
Where the slotted holes are that the bolts to the crossmember go to it looks like the bolts are all the way to one side of the slot. Did you have to force or pry on it to get the bolts in there? The only other thing I can think of is the bearing was not installed correctly. The couple carrier bearings I have replaced didnt look exactly like what I removed... cant remember exactly what was different. It is easy to damage one even for an expereienced mechanic.
Cross-Country
Joined: Jul 2004
Posts: 56
Likes: 0
From: Louisiana
Folks my f-350 SRW is on the third one since June of 2009. I chalk the first up to bad install. It failed in two months, the second lasted from aug '09 thru nov '11.
For some reason, I think my problem is made worse when I tow my fifth wheel. At first I thought that hitting dips and buckles were causing the trailer to squat the bed ( I do have air bags installed) and that squatting might cause more axial displacement. My line of thinking was that maybe lack of proper lubricant in the splines may have caused the shaft to move because of resistance in the splines.
I still do not know what is causing the problem, but after a 10 hour pull, I had a failure, and two years later another failure after a 12 hour pull.
For some reason, I think my problem is made worse when I tow my fifth wheel. At first I thought that hitting dips and buckles were causing the trailer to squat the bed ( I do have air bags installed) and that squatting might cause more axial displacement. My line of thinking was that maybe lack of proper lubricant in the splines may have caused the shaft to move because of resistance in the splines.
I still do not know what is causing the problem, but after a 10 hour pull, I had a failure, and two years later another failure after a 12 hour pull.