Differential front yoke... Is it bad
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 1,125
Likes: 4
From: Flower Mound TX.
Differential front yoke... Is it bad
Differential front yoke... Is it bad ? I just pulled this yoke out and it has a dent in it by the weight on the outer rim.. I'm replacing the pinion seal that was leaking. Is it posible to bend that back a bit and reuse it ? Or should I just get a new one? Any help would be great !
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 1,125
Likes: 4
From: Flower Mound TX.
Thanks !!! That was what I was hoping to hear. I'm doing the job my self so I can save on some money... SO , I can have Mike ( a C3 guru mech. ) do some upgrades on the car. Thanks again for the fast response.
Melting Slicks
Joined: Oct 2005
Posts: 2,114
Likes: 0
From: upstate N.Y.
Are you doing the seal on the car?I have been thinking about doing mine and was wondering how hard of a job.My torq wrench is in ft.lbs. but i have read the nut is supposed to be 11-12 inch lbs.I am thinking thats converted to 1ft. lb.Good luck!
Tech Contributor
Joined: Aug 1999
Posts: 15,177
Likes: 3,994
From: Connecticut, USA
I have the on car procedure in a full thread on the other forum. It will help you. Witness mark it, trying to swing a TW in under the car is a PITA. You need a 0-30 in/lbs dial wrench as well. Used bearings will be in the 5 in/lbs range. You don't want to overload it and crush the sleeve anymore.
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Le Mans Master
Joined: Jan 2000
Posts: 8,918
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From: New Hill NC
The nut is not tightened to inch pounds, the torque to turn the pinion is in inch pounds after the nut is torqued. The nut will need much more tightening than that. I can tell you, it is difficult to get any kind of accurate reading if the rear is in the car. The best way is to mark the nut and replace it where it was. If you didnt mark it, just tightening it up to somewhere in the 75-100 range and let it be. You should check it to make sure it is not binding the pinion, but usually this will work OK.
Safety Car
Joined: Oct 2006
Posts: 3,930
Likes: 15
From: Calgary Alberta
The nut is not tightened to inch pounds, the torque to turn the pinion is in inch pounds after the nut is torqued. The nut will need much more tightening than that. I can tell you, it is difficult to get any kind of accurate reading if the rear is in the car. The best way is to mark the nut and replace it where it was. If you didnt mark it, just tightening it up to somewhere in the 75-100 range and let it be. You should check it to make sure it is not binding the pinion, but usually this will work OK.
Last edited by stinger12; Jan 31, 2008 at 11:08 AM.
Melting Slicks
Joined: Oct 2005
Posts: 2,114
Likes: 0
From: upstate N.Y.
Sorry ,but didn't plan to high-jack this thread.Lots of good info.I always thought the nut was in.lbs. Didn't seem near enough torque.I had originally sent it to that place in Texas to get fixed twice and both times came back worse.I may try the witness mark method.Thanx
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
Sorry ,but didn't plan to high-jack this thread.Lots of good info.I always thought the nut was in.lbs. Didn't seem near enough torque.I had originally sent it to that place in Texas to get fixed twice and both times came back worse.I may try the witness mark method.Thanx
what place in TX??
Tech Contributor
Joined: Aug 1999
Posts: 15,177
Likes: 3,994
From: Connecticut, USA
The nut is not tightened to inch pounds, the torque to turn the pinion is in inch pounds after the nut is torqued. The nut will need much more tightening than that. I can tell you, it is difficult to get any kind of accurate reading if the rear is in the car. The best way is to mark the nut and replace it where it was. If you didnt mark it, just tightening it up to somewhere in the 75-100 range and let it be. You should check it to make sure it is not binding the pinion, but usually this will work OK.
Interesting note on torque loading. If you were fitting a solid shim then it is torqued to 125 ft/lbs like you would a rear spindle(100 ft/lbs) then the drag is checked in in/lbs. With a crush sleeve you crush it until you get into the range of drag required to preload the bearings.
If you have the diff out of the car, then again the drag is checked but the yoke nut is not torqued to a ft/lb spec, the interest is in the rotational drag.
If you removed the nut and didn't mark it, when reinstalling you can feel the nut/yoke bottom out and stop against the brg and crush sleeve. If you use an impact gun at this point then you can overcrush the sleeve and change the brg preload. Basically you want the yoke back where it was before, you're just replacing the seal.
Hope this clears it up.
Last edited by GTR1999; Jan 31, 2008 at 03:59 PM.
Melting Slicks
Joined: Oct 2005
Posts: 2,114
Likes: 0
From: upstate N.Y.
This is correct. Like I said trying to use a TW in the confined area under the car is tricky at best. The witness mark method is best or some guys measure from the pinion to the nut. You must reuse that old nut with #271 loctite.
Interesting note on torque loading. If you were fitting a solid shim then it is torqued to 125 ft/lbs like you would a rear spindle(100 ft/lbs) then the drag is checked in in/lbs. With a crush sleeve you crush it until you get into the range of drag required to preload the bearings.
If you have the diff out of the car, then again the drag is checked but the yoke nut is not torqued to a ft/lb spec, the interest is in the rotational drag.
If you removed the nut and didn't mark it, when reinstalling you can feel the nut/yoke bottom out and stop against the brg and crush sleeve. If you use an impact gun at this point then you can overcrush the sleeve and change the brg preload. Basically you want the yoke back where it was before, you're just replacing the seal.
Hope this clears it up.
Interesting note on torque loading. If you were fitting a solid shim then it is torqued to 125 ft/lbs like you would a rear spindle(100 ft/lbs) then the drag is checked in in/lbs. With a crush sleeve you crush it until you get into the range of drag required to preload the bearings.
If you have the diff out of the car, then again the drag is checked but the yoke nut is not torqued to a ft/lb spec, the interest is in the rotational drag.
If you removed the nut and didn't mark it, when reinstalling you can feel the nut/yoke bottom out and stop against the brg and crush sleeve. If you use an impact gun at this point then you can overcrush the sleeve and change the brg preload. Basically you want the yoke back where it was before, you're just replacing the seal.
Hope this clears it up.
Melting Slicks
Joined: Oct 2005
Posts: 2,114
Likes: 0
From: upstate N.Y.
They were told several times about the problem and several other issues ,like core refunds. Just got promises from the co.and checks in the mail and no return calls.There are several post from other members about them. After awhile it just gets too agravating.
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
why would you think you would get in trouble? the rules state you are allowed to post both good and BAD transactions.....If someone hasn`t treated you right you should alert us all so no one else has to deal with the aggravation....
redvetracr
Melting Slicks
Joined: Oct 2005
Posts: 2,114
Likes: 0
From: upstate N.Y.
I thought I read somewhere that too many complaints about about a co. would get you banned. There have been several negative posts about them which I added comments to . Since then they have changed their name.But I feel they are the same co.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 1,125
Likes: 4
From: Flower Mound TX.
I have the on car procedure in a full thread on the other forum. It will help you. Witness mark it, trying to swing a TW in under the car is a PITA. You need a 0-30 in/lbs dial wrench as well. Used bearings will be in the 5 in/lbs range. You don't want to overload it and crush the sleeve anymore.
As you can see no room to back out 6" bolts.
I bought this pully at Autozone for 4.95... It worked great and was a good size for a tight fit.
Here's what it looked like off.
Last edited by in2fun; Jan 31, 2008 at 07:29 PM.