What does this wear spot on my Diff mean ?
Melting Slicks
Joined: Apr 1999
Posts: 2,521
Likes: 4
From: Windham, NH
Re: What does this wear spot on my Diff mean ? (Pete76Shark)
It means that your axle shaft is worn. If you jacked the car up and tried pushing & pulling on the top of the tire in & out, you will see a great deal of movement in the stub shaft. The marks are from the u-joint bolts hitting the housing. Time to pull the rear and buy some new axles :sad: .
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
Re: What does this wear spot on my Diff mean ? (Pete76Shark)
Agreed, it appears to be the yokes. I recommend good quality replacements (not the cheap ones). Expect to spend up to $1K if you have someone else pull it and do all the work. My price reference is several years old, but I pulled it myself and had it completely rebuilt for $600.
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
Re: What does this wear spot on my Diff mean ? (SharkAttack)
The only good news is that you won't need snap ring pliers to take the yokes out.
They are no doubt worn past the grooves that keep the clips. The clip is now in
small pieces at the bottom of the diff. Mine survived OK after eating one of the
clips. In fact, I never realized it until removal. This is a long but do-able DIY
job, assuming other things don't need attention. As you proceed to pull the
differential out, you'll feel like there is a surprise around every corner.
Getting the pumpkin out is the biggest hurdle, as it entails removing most all
of the rear suspension.
Good luck ... :seeya :smash:
[Modified by NHvette, 10:54 PM 1/31/2003]
They are no doubt worn past the grooves that keep the clips. The clip is now in
small pieces at the bottom of the diff. Mine survived OK after eating one of the
clips. In fact, I never realized it until removal. This is a long but do-able DIY
job, assuming other things don't need attention. As you proceed to pull the
differential out, you'll feel like there is a surprise around every corner.
Getting the pumpkin out is the biggest hurdle, as it entails removing most all
of the rear suspension.
Good luck ... :seeya :smash:
[Modified by NHvette, 10:54 PM 1/31/2003]
Melting Slicks
Joined: Aug 2000
Posts: 2,310
Likes: 1
Re: What does this wear spot on my Diff mean ? (Pete76Shark)
I'm in the middle of this one myself.
Here's the pic I posted a while back... http://users.erols.com/jerryp58/corv...earproblem.jpg
If your not familiar with how the system is set up, each yokes rests against the pinion shaft in the center of the carrier. They push against it, constantly spinning, constantly wearing down. It's a heck of a design). So, material wears off of them (and gets to float around the diff and through all the gears & clutches :rolleyes: ) and it can go ignored until it gets out of hand like ours.
There are several good posts (archived and recent) about differential removal.
It's not a super complex task (just tedious and you may need a BIG breaker bar -- or a little gear puller) to get the differential out, but the diff rebuild was beyond my toolbox.
I am going to farm this one out.
It's going in this week so I don't have the final bill, but FWIW, here's what it looks like:
$375 for carrier removal and reinstall.
$250 for differential rebuild.
$20 for new pinion shaft.
$20 for poly carrier front snubber bushing.
$60 for halfshafts from eBay.
I expect there'll be about another $20 to $50 for incidentals & fluid, but if I walk away under $1000, I'll be happy. If it stays uner $800 I'll be thrilled!
I hope this helps. Good Luck.
Here's the pic I posted a while back... http://users.erols.com/jerryp58/corv...earproblem.jpg
If your not familiar with how the system is set up, each yokes rests against the pinion shaft in the center of the carrier. They push against it, constantly spinning, constantly wearing down. It's a heck of a design). So, material wears off of them (and gets to float around the diff and through all the gears & clutches :rolleyes: ) and it can go ignored until it gets out of hand like ours.
There are several good posts (archived and recent) about differential removal.
It's not a super complex task (just tedious and you may need a BIG breaker bar -- or a little gear puller) to get the differential out, but the diff rebuild was beyond my toolbox.
I am going to farm this one out.
It's going in this week so I don't have the final bill, but FWIW, here's what it looks like:
$375 for carrier removal and reinstall.
$250 for differential rebuild.
$20 for new pinion shaft.
$20 for poly carrier front snubber bushing.
$60 for halfshafts from eBay.
I expect there'll be about another $20 to $50 for incidentals & fluid, but if I walk away under $1000, I'll be happy. If it stays uner $800 I'll be thrilled!
I hope this helps. Good Luck.
