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Old 04-22-2019, 04:44 PM   #1
llafro
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Slop in rear end?

In trying to diagnose a vibration, I started shaking and moving everything I could in the rear end to find a possible problem. Two things I found:

1. We held the pinion stationary and could rotate the wheels back and forth a good 2" with a nice clunk. How much slop should there be in there?

2. I grabbed both axles where they fit into the pumpkin. The passenger side one is solid and doesn't move. The driver side one has a decent "clunk" up and down and feels like it is moving. How much is normal?
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Old 04-22-2019, 05:57 PM   #2
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Quote:
Originally Posted by llafro...View Post
In trying to diagnose a vibration, I started shaking and moving everything I could in the rear end to find a possible problem. Two things I found:



1. We held the pinion stationary and could rotate the wheels back and forth a good 2" with a nice clunk. How much slop should there be in there?



2. I grabbed both axles where they fit into the pumpkin. The passenger side one is solid and doesn't move. The driver side one has a decent "clunk" up and down and feels like it is moving. How much is normal?

Might be time for a new rear end.

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Old 04-23-2019, 09:14 AM   #3
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CV joints are very worn.
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Old 04-23-2019, 09:46 AM   #4
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Quote:
Originally Posted by Nothubertjfarnsworth...View Post
CV joints are very worn.

We tried holding the inner stub where it goes into the pumpkin on each side and rotating the wheels against that. There wasn't a lot of movement in the axles. I also tried grabbing the axle and twisting just that. The wheel moves in unison with the axle. The slack appears to be in the differential.
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Old 04-23-2019, 10:47 AM   #5
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Quote:
Originally Posted by llafro...View Post
We tried holding the inner stub where it goes into the pumpkin on each side and rotating the wheels against that. There wasn't a lot of movement in the axles. I also tried grabbing the axle and twisting just that. The wheel moves in unison with the axle. The slack appears to be in the differential.

Take the stubs out and inspect them, and if there's no spline wear and they're not twisted, take the rear cover off and check the pinion depth and backlash. It still sounds like CV joint play to me.

Tolerances compound, and the axles are hard to test for radial play with them in the car.
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Old 04-23-2019, 12:26 PM   #6
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These cars also have a lot of driveline slop from the trans to the wheel even when things are fresh and set up ok. Not that they can't be set up BETTER, but the factory seems to have set them up all pretty loose for some reason. There is more slop in the transmission output shaft and CV joints than in the differential gears in my experience though. The OP should be scrutinizing the CV joints first though, as has been suggested above.
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Old 04-23-2019, 12:53 PM   #7
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Quote:
Originally Posted by Rich-Tripower...View Post
These cars also have a lot of driveline slop from the trans to the wheel even when things are fresh and set up ok. Not that they can't be set up BETTER, but the factory seems to have set them up all pretty loose for some reason. There is more slop in the transmission output shaft and CV joints than in the differential gears in my experience though. The OP should be scrutinizing the CV joints first though, as has been suggested above.

Time for a up grade

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Old 04-23-2019, 05:51 PM   #8
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Quote:
Originally Posted by Rich-Tripower...View Post
These cars also have a lot of driveline slop from the trans to the wheel even when things are fresh and set up ok. Not that they can't be set up BETTER, but the factory seems to have set them up all pretty loose for some reason. There is more slop in the transmission output shaft and CV joints than in the differential gears in my experience though. The OP should be scrutinizing the CV joints first though, as has been suggested above.

Yep.
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Old 04-24-2019, 01:46 PM   #9
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You guys have to take into consideration if the op is moving the wheels and measuring slot at the outside edge of a 26" tall tire, thats is going to amplify the amount of slop portrayed. Now, if he removed the wheel and the hub could be moved back and forth 2".....that would be a problem. The 13" from centerline of the hub (outside of the tire)adds to the perception....kinda of like using a longer wrench, the longer the wrench, the further you have to move it to move the nut the same distance as a shorter wrench. With all that being said, mine has alot of slack too if i measure at the tire.
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Old 04-24-2019, 01:50 PM   #10
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I work at a honda dealership, I just wlked out in the shop and checked the slack on a brand new accord, it had at least an inch of slack at the tire.
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Old 04-24-2019, 03:23 PM   #11
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I think I am going to work on building a rear end with a view towards swapping it out and installing new axles and stubs. I just dropped major coin on rebuilding the transmission, new clutch, short shifter and drive shaft, so the money tree has fewer leaves on it right now...
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Old 04-24-2019, 06:28 PM   #12
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If your rear end isn't howling or making other noises, and you don't have a one wheel peel, leave it alone. Just do stubs and axles for now.
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Old 04-24-2019, 06:32 PM   #13
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Quote:
Originally Posted by llafro...View Post
2. I grabbed both axles where they fit into the pumpkin. The passenger side one is solid and doesn't move. The driver side one has a decent "clunk" up and down and feels like it is moving. How much is normal?

Now, i re-read this, what part is moving exactly? Are you grabbing the stub and it's moving up and down, or the axle bar is moving up and down?
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Old 04-25-2019, 07:17 AM   #14
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Quote:
Originally Posted by Nothubertjfarnsworth...View Post
Now, i re-read this, what part is moving exactly? Are you grabbing the stub and it's moving up and down, or the axle bar is moving up and down?

Actually, either one sounds like bad news.
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Old 04-25-2019, 09:36 AM   #15
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Quote:
Originally Posted by Nothubertjfarnsworth...View Post
Now, i re-read this, what part is moving exactly? Are you grabbing the stub and it's moving up and down, or the axle bar is moving up and down?

I was grabbing the stub and pushing it up and pulling it back down. It had some movement and made a clunk. The passenger side, by comparison, didn't move and made no noise.

I'm thinking of buying a spare rear end off e-bay and having that built. I guess it would be easier than having mine out of service for a while.
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Old 04-25-2019, 10:55 AM   #16
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Quote:
Originally Posted by llafro...View Post
I was grabbing the stub and pushing it up and pulling it back down. It had some movement and made a clunk. The passenger side, by comparison, didn't move and made no noise.

I'm thinking of buying a spare rear end off e-bay and having that built. I guess it would be easier than having mine out of service for a while.

Oh, crap.

Mebbe the LSD guts are smurfed.

You sure it isn't making noise?
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Old 04-25-2019, 12:39 PM   #17
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The little needle bearing in the side adjuster that supports the stub could be the issue. If it is the issue, those needles have probably gone through every gear and bearing in the diff.

Pop the axle stub out and see if the support bearing is good.
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Old 04-25-2019, 08:19 PM   #18
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Quote:
Originally Posted by llafro...View Post
I was grabbing the stub and pushing it up and pulling it back down. It had some movement and made a clunk. The passenger side, by comparison, didn't move and made no noise.

I'm thinking of buying a spare rear end off e-bay and having that built. I guess it would be easier than having mine out of service for a while.

I have a spare in thousand oaks I paid 350 for, didnt need it, fixed mine. You could have it for what I paid- I a;so have a perfect low mileage ring and pinion bought off of a member here.
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Old 04-26-2019, 01:33 PM   #19
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Quote:
Originally Posted by gastiresnoil...View Post
I have a spare in thousand oaks I paid 350 for, didnt need it, fixed mine. You could have it for what I paid- I a;so have a perfect low mileage ring and pinion bought off of a member here.

I wouldgo to geforce.com look at the ruins that they have for sale and see if you can find something you might be more interested in I'm already there looking cuz I got to replace my rear end of my GTO have a good day

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Old Today, 11:21 AM   #20
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Quote:
Originally Posted by gastiresnoil...View Post
I have a spare in thousand oaks I paid 350 for, didnt need it, fixed mine. You could have it for what I paid- I a;so have a perfect low mileage ring and pinion bought off of a member here.

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