Rear end rebuild
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Senior User
Joined: Oct 2004
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Rear end rebuild
I have a 96 5.8 auto Bronco with over 200k miles on it. I will be in need of a new rear end at some soon in the near future. Before i go that route, I wanted to ask a few questions from you guys first.
The local mechanic here said he could do it for around 1200. Is this a reasonable price? Is this something the average shade tree person could do? Would the junk yard have something that I could swap out?
What do you think? Thanks.
The local mechanic here said he could do it for around 1200. Is this a reasonable price? Is this something the average shade tree person could do? Would the junk yard have something that I could swap out?
What do you think? Thanks.
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
for your bronco any 93-96 bronco or F150 8.8 rear end would swap right over. the price you were quoted is crazy high. i payed that much to have both front and rear axles rebuilt with 4.88 gears, new front carrier, new ujoints in front axles and master rebuild kits.
if you keep up with maintenance on the front/rear diffs with proper gear oil change intervals you should not having anything to worry about other then bearings needing replaced. the axles and ring/pinion should last a long time.
if you keep up with maintenance on the front/rear diffs with proper gear oil change intervals you should not having anything to worry about other then bearings needing replaced. the axles and ring/pinion should last a long time.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
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From: St Louis
You should pull the cover to make sure that things look okay. Metal shavings present in the pumpkin would suggest a need of major overhaul. Question though, have you checked to make sure the pinion nut is not loose on the rear axle input? If it is loose I believe that the pinion can be pulled into the pumpkin when you apply torque in the reverse direction, enough so that you may be hitting the diff when you back up. Just something you can check before opening the cover up on the differential.
Hotshot
Joined: Jul 2002
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From: Bend,OR
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Posting Guru
Joined: Oct 2005
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From: Longwood, Fl
I am thinking the noise (slight roar) is coming from the axle bearings (93 Bronco/5.8). Do the replacement bearings, the ones that move the rollers to the unworn part of the axle work very well? Alternatives are to replace axles with std bearings (not cheep!) or to replace the housing ends with a 9" style cup and use 9" axles. Can the 9" cups be used with the OEM axles (similar to the way the "C" clip eliminators work) and press on a 9" style bearing.
Bunch of questions, I know. I am tending to like the 9" ends, but that can get expensive---Now if 3.90's could be put in that "44"
Bunch of questions, I know. I am tending to like the 9" ends, but that can get expensive---Now if 3.90's could be put in that "44"
Posting Guru
Joined: Apr 2006
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First, vote is the pinion nut is loose. It can be tightened, but may need a new crush sleeve. The experts will all tell you to replace the sleev everytime you take the nut off. (or it backs off)
Benshere, That wheel bearing design is the worst part or the 8.8. Why they incorporated a ware item (wheel bearing) as part of a non ware item (axle) I'll never know. This was one of the reasons I went to the full float setup. In any case the repare kit (moves the bearing) does work for a while. If you have stock tires, it may work for a long time.
I heard the 9" end conversion is not recomended for trucks. Just straight line drag cars.
Benshere, That wheel bearing design is the worst part or the 8.8. Why they incorporated a ware item (wheel bearing) as part of a non ware item (axle) I'll never know. This was one of the reasons I went to the full float setup. In any case the repare kit (moves the bearing) does work for a while. If you have stock tires, it may work for a long time.
I heard the 9" end conversion is not recomended for trucks. Just straight line drag cars.
Posting Guru
Joined: Oct 2005
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From: Longwood, Fl
Hey Rich!
TX---I know they dont recommend the C-clip eliminators for trucks because of side loading (I think thats the reason). I have done a couple of those on "stangs" and lighter Tbirds and they work pretty well, at least my tail hasnt dragged on the pavement-----yet
A local 4WD place down here suggested another option, which saws the end off the 8.8 tubes and welds on an end that is for a 9". Supposedly you can then use 9" axles in the 8.8 housing and have a full 9" bearing, pressed on so that no "wear" item is run on a "non-wear" part. There is a kit designed specifically for that purpose.
That is essentially what the "C" clip eliminator does except that the bearing housing part is not an integral part of the axle tube.
I am curious as to why the OEM 8.8 axles cannot have a 9" style bearing pressed on and then be used in the weld on part, instead of having to buy a new 9" axle set. I suppose if I had good sense, I would just do the "repair" bearings and be done with it----but then, you have never heard me say that I had good sense!!
I havnt been on 10 through your part of Fl for quite a while-----!
TX---I know they dont recommend the C-clip eliminators for trucks because of side loading (I think thats the reason). I have done a couple of those on "stangs" and lighter Tbirds and they work pretty well, at least my tail hasnt dragged on the pavement-----yet
A local 4WD place down here suggested another option, which saws the end off the 8.8 tubes and welds on an end that is for a 9". Supposedly you can then use 9" axles in the 8.8 housing and have a full 9" bearing, pressed on so that no "wear" item is run on a "non-wear" part. There is a kit designed specifically for that purpose.
That is essentially what the "C" clip eliminator does except that the bearing housing part is not an integral part of the axle tube.
I am curious as to why the OEM 8.8 axles cannot have a 9" style bearing pressed on and then be used in the weld on part, instead of having to buy a new 9" axle set. I suppose if I had good sense, I would just do the "repair" bearings and be done with it----but then, you have never heard me say that I had good sense!!
I havnt been on 10 through your part of Fl for quite a while-----!
Freshman User
Joined: Jul 2007
Posts: 38
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From: Phoenix, AZ
What years swap to what years?
for your bronco any 93-96 bronco or F150 8.8 rear end would swap right over. the price you were quoted is crazy high. i payed that much to have both front and rear axles rebuilt with 4.88 gears, new front carrier, new ujoints in front axles and master rebuild kits.
if you keep up with maintenance on the front/rear diffs with proper gear oil change intervals you should not having anything to worry about other then bearings needing replaced. the axles and ring/pinion should last a long time.
if you keep up with maintenance on the front/rear diffs with proper gear oil change intervals you should not having anything to worry about other then bearings needing replaced. the axles and ring/pinion should last a long time.
Will a '90 8.8 not fit in my '94? I assumed that all "truck" 8.8's were interchangeable! Now I'm glad I waited.
Thanks,
-Derek