How Tight Carrier

[Ronno6]

So it was .006" in one spot and .009" in the other? That doesn't sound too good.

However if the contact pattern is right then I guess proceed as normal. Do you have a way of properly measuring pinion preload?

The torque stick,.. you can probably get away with it. It's not ideal, but I guess you could do worse things.

I will recheck, but I did get readings in both extremes.
I only have a bar style 1/4" in/lbs torque wrench. I have seen people use them. I really don't want to purchase a dial type....... I may try to torque the ring gear bolts when I have the carrier out for crush sleeve installation. Dunno if it will fir my bench vise..padded of course. Other than that or the torque stick, I guess I could put the axles in and install wheels and tires for some ground friction........

 

[bucket]

So the mesh pattern was good then?

That's something people like to see. Much like a good weld that resembles a stack of dimes

 

[Ronno6]

So the mesh pattern was good then?

That's something people like to see. Much like a good weld that resembles a stack of dimes

Surprisingly so..........

 

[Blue Ox]

A beam-type torque wrench for the pinion is perfect as long as you're careful and get repeatable readings.

It seems odd that you can't get consistent readings on gear lash and that there is such a large variation. It is tricky to get everything lined up right and immobilize the pinion. But you should be able to get repeatable results without that much variation.

 

[crazy4offroad]

Axle shafts will have play, wont work. Put a big pipe wrench on the pinion yoke and let it rotate over against the ground. Put something heavy on the handle if you have to but you shouldnt.

 

[Ronno6]

A beam-type torque wrench for the pinion is perfect as long as you're careful and get repeatable readings.

It seems odd that you can't get consistent readings on gear lash and that there is such a large variation. It is tricky to get everything lined up right and immobilize the pinion. But you should be able to get repeatable results without that much variation.

I will be repeating the test to make sure...

 

[Ronno6]

Axle shafts will have play, wont work. Put a big pipe wrench on the pinion yoke and let it rotate over against the ground. Put something heavy on the handle if you have to but you shouldnt.

The rear axle is out of the vehicle and sitting on a couple of jack stands...

 

[Ronno6]

So it was .006" in one spot and .009" in the other? That doesn't sound too good.

I have rechecked and do indeed find extremes as I posted.
Most readings are .007" to .008"

I checked the lateral runout of the back side of the carrier flange and found a TIR of .003"
This matched the runout I measured on the backside of the mounted ring gear.
Is that normal/acceptable??
I would suspect that could contribute to the backlash variation..

 

[Blue Ox]

In theory,... there's not much you can do about it. I looked at my manual for the 8.5" (mine is for the front, but it should be similar) and GM says no more then .002" total. I don't know if I would panic about an extra .001". If everything else is in spec you're probably okay.

You could try rotating the ring gear 180° on the carrier and check the runout of the ring gear again. You may be dealing with a stackup of tolerances, or may get it to work in your favor. Can't say I've ever run into that before, but I've only done about 5 rears, so I may have just been lucky.

 

[Ronno6]

In theory,... there's not much you can do about it. I looked at my manual for the 8.5" (mine is for the front, but it should be similar) and GM says no more then .002" total. I don't know if I would panic about an extra .001". If everything else is in spec you're probably okay.

You could try rotating the ring gear 180° on the carrier and check the runout of the ring gear again. You may be dealing with a stackup of tolerances, or may get it to work in your favor. Can't say I've ever run into that before, but I've only done about 5 rears, so I may have just been lucky.

I had thought about the stacking of tolerances, but, as the TIR is same for both parts, I can't think it can be improved by changing the orientation. I am not certain that the measurements are the same at the same point on each part (I may verify that,) but still do not believe I can do much better.

 

[Blue Ox]

Probably not if it's in the carrier itself. Look at it this way, It's been working like that since it left the factory and it's never been a problem. If you weren't changing the gears it would have gone on like that forever.

 

[Ronno6]

Probably not if it's in the carrier itself. Look at it this way, It's been working like that since it left the factory and it's never been a problem. If you weren't changing the gears it would have gone on like that forever.

Nah...brand new Yukon posi carrier and Richmond Gearz..........

 

[Blue Ox]

Then I guess you're going with the .003" unless you want to send the carrier back.

 

[Ronno6]

FINALLY....got the C10 back on the ground.
All seems to be well with the differential....no whining or growling.

I think I may have done it right................