Rear End Failure
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Junior User
Joined: May 2005
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From: Orlando, FL/ Lakeville MA
Rear End Failure
Hi, I have a 99 F-250 SD with 196,000 . I bought it with 140k 3 years ago and there was a slight whine from the rear when I would accelerate or let off the throttle. I was changing the gear oil today and noticed teeth marks in the carrier about .002" deep.
Would it be a safe assumptions that the forward pinion bearing is giving way. The nut is tight, so I know it did not back out? Two years ago I stupidly tried to correct it but hitting it with an impact gun, is there a crush collar in the pinion assembly?
I will try to upload a pic. I am supposed to two a jeep about 800 miles Thursday and am hoping not to have any problems. Any idea how much a stealership would charge to fix it?
Thanks
Would it be a safe assumptions that the forward pinion bearing is giving way. The nut is tight, so I know it did not back out? Two years ago I stupidly tried to correct it but hitting it with an impact gun, is there a crush collar in the pinion assembly?
I will try to upload a pic. I am supposed to two a jeep about 800 miles Thursday and am hoping not to have any problems. Any idea how much a stealership would charge to fix it?
Thanks
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
I've always been told that if the ring gear has any visible gouging on it, then it is time to replace the ring and pinion gears.
Hitting the pinion nut with an impact gun probably overtightened it, which is why you now have the.002 mark, as you now probably know.
Will it be OK? Tough call. The 10.5 is a pretty stout differential. It may hold up fine with a new pinion bearing and crush sleeve.
If you're not doing any heavy towing, I would put a new pinion bearing and sleeve in, then change the gear oil after 20,000 miles or so. Do a close inspection to see if there is any more damage, or a lot of metal in the oil.
If you're doing a lot of heavy towing, I'd recommend get new gears and just rebuild the differential.
Complete junkyard axles are always a gamble. Unless you do a lot of checking at the junkyard for internal damage and housing straightness, you're gambling that what you're getting is better than what you have.
Hitting the pinion nut with an impact gun probably overtightened it, which is why you now have the.002 mark, as you now probably know.
Will it be OK? Tough call. The 10.5 is a pretty stout differential. It may hold up fine with a new pinion bearing and crush sleeve.
If you're not doing any heavy towing, I would put a new pinion bearing and sleeve in, then change the gear oil after 20,000 miles or so. Do a close inspection to see if there is any more damage, or a lot of metal in the oil.
If you're doing a lot of heavy towing, I'd recommend get new gears and just rebuild the differential.
Complete junkyard axles are always a gamble. Unless you do a lot of checking at the junkyard for internal damage and housing straightness, you're gambling that what you're getting is better than what you have.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Hi, I have a 99 F-250 SD with 196,000 . I bought it with 140k 3 years ago and there was a slight whine from the rear when I would accelerate or let off the throttle. I was changing the gear oil today and noticed teeth marks in the carrier about .002" deep.
Would it be a safe assumptions that the forward pinion bearing is giving way. The nut is tight, so I know it did not back out? Two years ago I stupidly tried to correct it but hitting it with an impact gun, is there a crush collar in the pinion assembly?
I will try to upload a pic. I am supposed to two a jeep about 800 miles Thursday and am hoping not to have any problems. Any idea how much a stealership would charge to fix it?
Thanks
Would it be a safe assumptions that the forward pinion bearing is giving way. The nut is tight, so I know it did not back out? Two years ago I stupidly tried to correct it but hitting it with an impact gun, is there a crush collar in the pinion assembly?
I will try to upload a pic. I am supposed to two a jeep about 800 miles Thursday and am hoping not to have any problems. Any idea how much a stealership would charge to fix it?
Thanks
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Junior User
Joined: May 2005
Posts: 55
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From: Orlando, FL/ Lakeville MA
The noise is the same but I am getting a slight vibration. I know the u joints should be replaced, but I have a bad feeling its not the u joints making the vibration.
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Posting Guru
Joined: Aug 2008
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From: Sunny, Snowy, CO
Get the u-joints ASAP...Trust me...I had a worn one that stuck and bent the driveshaft on an 02 F150. Then it got pricey. Wallowed out the seal on the diff, bent the driveshaft, cracked the transmission cone, and all kinds of c-r-a-p. Over 3g to fix it, so it went away. Damn truck was nickel and diming me to death anyway. "For want of a nail, the horse was lost".
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Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
You asked about cost at a dealer. I would not take a gear job to a dealer. Most towns of any size have a shop that specializes in gear work. That is where I would take it. Gear swaps usually run $750-$1000 per differential.
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