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How much wheel wobble is acceptable in late model rear?
Posted by: RonnieG ()
Date: July 10, 2018 09:54AM

I have noticeable play in both left and right axles. When I grab the wheel I can wobble it enough for some concern. I can feel the wobble play between the brake drum and the backing plate.

How much wobble is acceptable? I am assuming they should be pretty rock solid without any play.

Thoughts?

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: steve c goodman ()
Date: July 10, 2018 10:01AM

Of course the bearings need some play. When you look for play next time grab tire at top and bottom and while rocking it watch your axle/u-joint at diff. You will see motion as entire axle moves in and out of the diff.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: RonnieG ()
Date: July 10, 2018 10:29AM

Steve, thanks for the note. The play I feel is not end-play, it is more like I can create toe-in and toe-out on the wheel, with nothing else moving in the u-joint or axle.

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: thewolfe ()
Date: July 10, 2018 10:31AM

Sounds like wheel bearings maybe? I think a better check would be to pull the wheel and drum off and see how much the hub moves in and out with a dial gauge. You may need to remove the axle as well to get an accurate reading. .008 is the max according to the manual. I aim for .003 when doing rear wheel bearings.

Nate Wolfe
Portland OR
65 Corsa 180

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: RonnieG ()
Date: July 10, 2018 10:44AM

Nate, I was not able to sense any in/out movement. again, think toe in and out play.I can only feel the rocking play

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: steve c goodman ()
Date: July 10, 2018 10:46AM

RonnieG Wrote:
-------------------------------------------------------
> Steve, thanks for the note. The play I feel is
> not end-play, it is more like I can create toe-in
> and toe-out on the wheel, with nothing else moving
> in the u-joint or axle.

Ronnie you are grabbing wheel at 3 and 9 and moving it? If so either wheel brng or trailing arm moving?

Wheel brng loose would be same play no matter where you grip wheel.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: thewolfe ()
Date: July 10, 2018 10:55AM

You will have a hard time sensing in/out play on wheel bearings by pulling on the wheel. If it only has toe in/out movement then I would be looking at lower strut rod bushings.

Nate Wolfe
Portland OR
65 Corsa 180

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: RonnieG ()
Date: July 10, 2018 11:22AM

OK, I'll try to be clearer. If I grip the wheel at 12 and 6, I can rock it. If at 3 and 9, I can rock it. I every case, the strut rod bushings do not move. The u-joint or axle do not move. the connection to the diff does not move, I can feel the play between the edge of the brake drum and the backing plate, entirely within the bearing housing. I do not have to push/pull very hard to get the wheel to wobble. I am almost certain that the wheel bearings are worn out, and it looks like the axle has never been removed, by the looks of the crusty scale and surface rust. Again, I would assume that the hub assembly is a relatively tight assembly, not one with any wobble...

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: joelsplace ()
Date: July 10, 2018 11:34AM

Time to rebuild them!

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: thewolfe ()
Date: July 10, 2018 12:05PM

The hubs are what wobble. Even when they are set up properly with new bearings they wobble at the wheel like you describe. You need to check the hub play in and out with a dial gauge to know where you're at and if it's too much. You can't do it with the wheel on an it's so small you won't feel anything by pulling in and out on the wheel unless its really bad. .008 is max

Nate Wolfe
Portland OR
65 Corsa 180

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: RonnieG ()
Date: July 10, 2018 12:41PM

OK will do. thanks

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: TerribleTed ()
Date: July 10, 2018 12:48PM

Axle will likely need to be out to measure that play. The spring and suspension puts a pretty good pull on the axle which would make moving it in and out to measure difficult indeed. To reinstall the axle use a tie down strap to pull the trailing arm and bearing assy in toward the center to seat the axle in the yokes before installing the u-joint bolts. Makes this much less frustrating.

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: Spectre ()
Date: July 10, 2018 12:53PM

Ted's advice about u-joint bolts is especially helpful on a '65 with the smaller bolts.

David Clamp


1965 Corsa convertible - 140 4spd/3.55/AM-FM

2013 Mustang GT convertible - 5.0, 6spd auto, Procharger i-1

2003 Miata SE - 6spd manual (wife's toy)

"Victory is mine!" - SG

Oklahoma City, OK

Click for Oklahoma City, Oklahoma Forecast

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: TerribleTed ()
Date: July 10, 2018 01:32PM

Spectre Wrote:
-------------------------------------------------------
> Ted's advice about u-joint bolts is especially
> helpful on a '65 with the smaller bolts.


I just hate it when you are trying to get the axle bolts started and the axle goes sideways and drops a u-joint cup on the floor scattering the needle bearingssmiling smiley

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: joelsplace ()
Date: July 10, 2018 01:45PM

I hate the caps falling off also. I think that is the most annoying part of R&R on an LM drivetrain. Didn't something come with a thin metal strap that held the caps on? I would buy a case.

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: 66vairman ()
Date: July 10, 2018 02:06PM

joelsplace Wrote:
-------------------------------------------------------
> I hate the caps falling off also. I think that is
> the most annoying part of R&R on an LM drivetrain.
> Didn't something come with a thin metal strap
> that held the caps on? I would buy a case.

As a fellow at work would always say to most any question - "Duct Tape" - LOL.

I wrap duct tape around the "U" joint to hold the caps and then get the axle in place and use a ratching nylon strap to pull everthing up tight. Once you get the "U" joint end caps in the axle housing they stay in place (at least on a 66). Off comes the duct tape and on go the retainers. DON'T paint the axle sadle the "U" joint caps fit in - they won't go in if you do. Must be bare metal. Assemble THEN paint if you want.

I used the ratcheting nylon straps before motohead did the video, they are a great one man assistant.

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: steve c goodman ()
Date: July 10, 2018 02:27PM

The only 'aid' I use is a crowbar. I install the U-joint to the diff end flange and bolt straps in place. I line up cups with flange on outer (wheel) end and then place crowbar between top coils of spring and pull down until flange pivots inward and cups are in place. I hook my leg over the crowbar to hold the pressure and attach straps/bolts to axle flange. I am laying directly under the brake drum, easy to reach etc.


Never wanted to bother anyone else working around me so I figured out a way to do it by myself. Been doing it all these years and in fact just last week after replace a side seal on a 65. Takes no time at all to do it this way and no fiddling with come-alongs etc. No difference if short 65 bolts OR long 66-9 bolts either.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: TerribleTed ()
Date: July 10, 2018 06:44PM

steve c goodman Wrote:
-------------------------------------------------------
> The only 'aid' I use is a crowbar. I install the
> U-joint to the diff end flange and bolt straps in
> place. I line up cups with flange on outer
> (wheel) end and then place crowbar between top
> coils of spring and pull down until flange pivots
> inward and cups are in place. I hook my leg over
> the crowbar to hold the pressure and attach
> straps/bolts to axle flange. I am laying directly
> under the brake drum, easy to reach etc.
>
>
> Never wanted to bother anyone else working around
> me so I figured out a way to do it by myself.
> Been doing it all these years and in fact just
> last week after replace a side seal on a 65.
> Takes no time at all to do it this way and no
> fiddling with come-alongs etc. No difference if
> short 65 bolts OR long 66-9 bolts either.

I have used a method similar to this as well, but, ratchet strap is easier to me. I can lock the yoke in against the axle against the diff yoke with the strap and walk away if I want to (phone rang or whatever)and then come back and stick on the boltssmiling smiley Never a drop cap or have any funny angles nor keeping constant pressure to deal with. Oops this bolt seems to have some funny threads part way in...no problem slide out and go to scrounge. I just hook my strap into the opposite side strut rod bracket or around the diff and also around the torque arm just forward of the bearing unit.

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]

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Re: How much wheel wobble is acceptable in late model rear?
Posted by: steve c goodman ()
Date: July 10, 2018 07:23PM

I lay out the correct bolts and ignore the phone. It's only a 10 min or less per side. With some grease inside the cups they won't fall off any way.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: How much wheel wobble is acceptable in late model rear?
Date: July 10, 2018 07:53PM

steve c goodman Wrote:
-------------------------------------------------------
> I lay out the correct bolts and ignore the phone.
> It's only a 10 min or less per side. With some
> grease inside the cups they won't fall off any
> way.

<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>
Yeah, thumbs up if your needles are scattering across the floor, you don't have enough grease in there!
U-Joints love grease grinning smiley


Dan Davis ~ Pierce County, WA ~ CORSA Western Director + Corvairs NW + North Cascades Corvairs + Corvanatics
1966 Corsa Turbo coupe ~ ~ 1966 140 Corsa ~ ~ 1965 Monza 140/4 'Vert Sierra Tan/Fawn ~ 1964 Monza 'Vert (SOLD) ~ 1960 Monza Ermine White/Red PG ++ ~ 1965 Monza 140/4 Evening Orchid w/ ivory/black interior ~ 1962 Monza Wagon 102/4 ~ 1963 Rampside/Scamper ~ 1963 Red/Greenbrier ~ 1969 Ultra Van #468

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