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Quoted From guitarranger11:
As everyone knows I just replaced a bad rear wheel seal and bearing and the gears and everything look good in the rear end but it still howls and sounds like it grinding what could I be missing
Did you change the fluid or replace the fluid that was lost from the leaking into the brakes?
I f you are getting noise from the rear end and are sure both axle bearings are good ( the ones at the ends of the axle tubes near the brake assymbly) then most likely you have excessive wear in the the ring and pinion set or carrier bearings. you will need a dial indicator set up to check the run out of the ring and pinion and will probably need to disassemble the entire gear assembly to check the carrier bearings
Quoted From 619DioFan:
I f you are getting noise from the rear end and are sure both axle bearings are good ( the ones at the ends of the axle tubes near the brake assymbly) then most likely you have excessive wear in the the ring and pinion set or carrier bearings. you will need a dial indicator set up to check the run out of the ring and pinion and will probably need to disassemble the entire gear assembly to check the carrier bearings
+1 Great post.
You will need the correct equipment and factory specifications if you do decide to service your rear differential particularly when you are setting your backlash and pinion pre-load.
Kind of an update. When the car slows down into a lower gear it seems to get louder on the howling and grinding sound. I’m not sure about doing the repair by myself but just out of curiousity what equipment is needed for the repairs dreamer 2355
It may be the carrier bearings that are bad, a chassis ear would be great for something like this but you may be able to reproduce the noise if you jack up the rear wheels and put them on jack stands while you run through the gears, you may not hear the noise as much because it’s not under load but it might help you nail down where the noise is coming from. If you do find that it’s coming from the rear differential I would recommend taking it somewhere to have it repaired as it often requires specialized equipment and the proper measuring tools in order to do the repair effectively.
Quoted From guitarranger11:
Kind of an update. When the car slows down into a lower gear it seems to get louder on the howling and grinding sound. I’m not sure about doing the repair by myself but just out of curiousity what equipment is needed for the repairs dreamer 2355
When it comes to tearing down the rear end gear assembly you can do that with hand tools ( although removing the large nut that holds the yoke to the pinion can be challenging so a good impact gun is very helpful in that case ) to remove the carrier bearings from the gear assembly may require a press or large gear puller ( depends on how they are fitted in your application ) checking the backlash with a dial indicator setup prior to disassembly is recommended. reassembly will require the dial indicator as well as a good torque wrench to set the preload on the crush sleeve and retorqing the ring gear bolts if the gear is replaced ( fyi- these bolts are usually left hand thread ). you will also need some feeler gauges as you may need to shim the carrier bearings. hope this info helps.
This info is very helpful and in fall semester at school we’re doing differentials so would it be easier to pull out a differential out of the junk yard(they have 30 day warranty on it) and swap the 2 and if so is there any tricks I could use to do this. Does Eric have any videos on how to replace the carrier bearing.
I don’t have a video on it sorry, I don’t often see that style of differential and honestly those bearings don’t go bad all that often, they pretty much go bad when the fluid gets low or hasn’t been changed in some time. You really can’t swap out just the differential as it is a matched set to the pinion gear, you’re much better off just replacing the carrier bearings themselves, it’s really not that bad a job but you do need some special tools and you also need to correctly shim and align the differential once you reinstall it.
Thought I would throw out this suggestion to you… you may want to look for a good used rear end for the vehicle ( the whole rear end -brake drum to brake drum ) not just the gear assembly and put that in.. then use the old one as a learning project . whether at home or in a school setting. a while back I had a lady friend come to me with her “84 firebird , rear end howling like a mack truck. insteed of messing with rebuilding it I found a good lower milage one in the wrecking yard for 150.00. much faster and easier ( IMO )
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