8 3/4 axle fitment weird
#3062320
07/25/22 09:47 AM
07/25/22 09:47 AM
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Joined: Nov 2005
Posts: 253 Pasadena, Texas
fal3
OP
enthusiast
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OP
enthusiast
Joined: Nov 2005
Posts: 253
Pasadena, Texas
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I'm having axle fitment problems on passenger side axle. 8 3/4 details: sure grip (clutch); green bearings; 2.76 gears, no buttons. Background: swapped from 3.55 gears to 2.76. (I pulled differential out and sent to axle technician; axles were not worked on) Prior to the gear swap, had zero issues with differential- no leaks, no grinding, no whirring noises, no clunking, turns were not a problem. Situation: driver and passenger axles installed easy. When I torqued brake plate (35 ft lbs) to driver side, I checked for rotation of axle and differential (turned it at yoke) and rotated with minimal effort. Passenger side install was easy, but there were several problems that were encountered. First, passenger side axle flange butts right up against brake cylinder whereas driver side flange is 1" from brake cylinder. Second, and this is the weird part, when I tightened the brake plate, the axle would not rotate 360 degrees; it rotated only 355 degrees and would lock-up like a rod (just for example purposes) jammed the gears. Another way to put it is start at noon, rotate clockwise and differential noon point stops at 11. When you go back to noon, turn it ccw, it stops at 1, and again like a rod was used to jam it. I remove the pass axle and check for rotation. Driver side and differential rotated easily however many turns you want to spin it. So, I re-install pass side axle but do not tighten brake plate. Pass axle goes through complete rotations, brake cylinder though still butts up against axle flange. Again, when I torqued the brake plate, both sides only allowed 355 degrees of motion. This is what gets me. Honesty time. I'm out of my element here. I recognize there is something amiss, but my lack of detail knowledge on 8 3/4s has kept me from seeing a solution. I recognize there is a spacing issue going on, but I do not know how it could have happened with what I thought was a straightforward remove and replace job. So, I'm calling on the Moparts experts to help out. I live in Texas, and it has been hotter than f$(@ down here which limits my time working outdoors, especially for my age. I'm going to remove both axles and reinstall them to see if maybe (?) the problem solved itself because I did a better job of re-installing axles. Or the Mopar god smiled on me. I will make attempts to check in regularly for updates on info, so my apologies now for not responding in a quick fashion. I appreciate the time you take to respond.
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Re: 8 3/4 axle fitment weird
[Re: fal3]
#3062339
07/25/22 10:20 AM
07/25/22 10:20 AM
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Joined: Apr 2003
Posts: 12,225 Looking for a way out of Middl...
IMGTX
I Live Here
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I Live Here
Joined: Apr 2003
Posts: 12,225
Looking for a way out of Middl...
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Well detailed post. I would have started with the adjuster but you said you have green bearings so my only thought is have you tried bolting in only the passenger side axle to see if it is an axle/side issue? Could one stud be hitting the brake cylinder? Did the technician swap only the gears? Same limited slip unit correct?
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Re: 8 3/4 axle fitment weird
[Re: fal3]
#3062366
07/25/22 11:30 AM
07/25/22 11:30 AM
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Joined: Jan 2003
Posts: 74,937 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,937
U.S.S.A.
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Clutch type sure grip has 2 piece side gears , it's possible they have slipped out of alignment. pull the drivers side axle out and shine a light in and take a look at it . It's possble to get the axle in without having to take it all part . Put a wheel on the passside , set it on the ground and with a long bar thru a couple studs on the drivers side try to slip the sure grip by turning the axle and applying pressure inward on the axle .
Otherwise you're going to have to pull the chuck.
running up my post count some more .
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Re: 8 3/4 axle fitment weird
[Re: Sniper]
#3062733
07/26/22 01:08 PM
07/26/22 01:08 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I think the important part is that you stopped, stepped back and went for help rather than a bigger hammer. X2
live every 24 hour block of time like it's your last day on earth
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Re: 8 3/4 axle fitment weird
[Re: RapidRobert]
#3062755
07/26/22 01:59 PM
07/26/22 01:59 PM
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Joined: Sep 2003
Posts: 19,305 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,305
north of coder
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I think the important part is that you stopped, stepped back and went for help rather than a bigger hammer. X2 x3 ! the BFH has been used throughout time, and has caused damage a guy doesn't want at times. [it is also hard on fingers and thumbs. ]
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