1 Wild R/T
Well-Known Member
Clutch style or Cone?
Guys that have put on more than one differential gasket
- Thread starter pearljam724
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Clutch style or Cone?
pearljam724
Well-Known Member
I guess this makes it a clutch ? Is one better than the other ? It’s surprising to me because it’s an original small block car. I had assumed it probably had a single drive axle. But, the complete drive line is original to the car. That’s why I’m surprised.
Cone
Clutch
As far as one being superior, they were both excellent but the majority of guys prefer the clutch style because it's (more easily) rebuildable. The cone diffs, used to be once they were worn out, they were done, but some folks have rehabbed them but it's not "get a new parts kit and start wrenching" easy like on the clutch units..the cone style also came in the 489 carrier which had the thicker pinion stem (1-7/8 vs 1-3/4 on the '742' carrier) the drawback there was the crush sleeve used for preload. They've since come out with a solid spacer that eliminates the crush sleeve...tough stuff either way!
Clutch
As far as one being superior, they were both excellent but the majority of guys prefer the clutch style because it's (more easily) rebuildable. The cone diffs, used to be once they were worn out, they were done, but some folks have rehabbed them but it's not "get a new parts kit and start wrenching" easy like on the clutch units..the cone style also came in the 489 carrier which had the thicker pinion stem (1-7/8 vs 1-3/4 on the '742' carrier) the drawback there was the crush sleeve used for preload. They've since come out with a solid spacer that eliminates the crush sleeve...tough stuff either way!
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pearljam724
Well-Known Member
Thank you, cone it is.
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Dako
Well-Known Member
I have had fine success with just a dry gasket multiple times. The key is clean dry surfaces.
pearljam724
Well-Known Member
Was it a paper thin gasket ?
Dako
Well-Known Member
It was thin...I don't know that it was literally paper thin. The other was one I cut out of a sheet of Gray gasket material I picked up at AutoZone. That was thicker. I even reused that one dry.
pearljam724
Well-Known Member
Anyone know torque spec for 10 bolt differential and the clasp that holds the rear U-Joint ?
15 lb/ft and a dab of blue loctite, good to go.
And don't ever call it a '10 bolt' again!!
And don't ever call it a '10 bolt' again!!
pearljam724
Well-Known Member
15 can’t be right for the universal joints. I’m also needing torque for third member. You know, the 10 nuts. I don’t get it, everyone else calls them 10 bolts ?15 lb/ft and a dab of blue loctite, good to go.
And don't ever call it a '10 bolt' again!!
For the 8-3/4, 15 is what it calls for, which is a fairly standard number for a 1/4" bolt. The bigger rears call for 170-200 inch pounds which is right in the same neighborhood, 15 converts to 180 inch pounds.
GM's have '10 bolt rears' Chrysler's have 8-3/4.
And as far as GM's go, technically when they refer to them by 10-bolt and 12-bolt, they're talking about the number of bolts in the ring gear.
Torque for the carrier to housing nuts is 45lb/ft.
pearljam724
Well-Known Member
Ok 15 for U joints and 45 for third member. Thank you
ch1ll
Member
my experience with stamped steel covers and paper gaskets on 50 year old cars is that the cover is always twinged a bit during removal. they come off hard. using a paper gasket with silicone sealant is the way to go, but the best way is a new cover and the best covers are not stamped steel.
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pearljam724
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Looking good, that gasket is a lot thicker than mine. I used Permatex Aviation gasket maker on all surfaces and a paper thin gasket. It’s been 3 days now and no leaks. We’ll see how it holds up when it gets hot. This is my first time using Aviation gasket maker. I like that it’s a lot easier to use compared to Silicone. But I don’t like, that it’s the color of oil. Makes a seem look like it’s seeping oil, lol !
pearljam724
Well-Known Member
No covers on 8-3/4 Mopars. I wish there was, fixing a leak would be a breeze.
AJ/FormS
Well-Known Member
To me "paper thin" implies .005 or thereabouts. I haven't seen gaskets that thin up here. Years ago I bought a box of 10, but they were thicker than "paper-thin", perhaps .020 or maybe a tad more, just guessing. They were too thin to stand up by themselves on edge, but would if you leaned them up on something. And they keep their shape when hanging on a nail.
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