1971 Charger 8 3/4 w/ Sure Grip and 3.23 Gears

Rusty34

FBBO Gold Member
FBBO Gold Member
Local time
9:43 AM
Joined
Apr 30, 2022
Messages
85
Reaction score
64
Location
Concord, NC
I just bought a rotisserie restored 71 Charger and it came with a really loud howling ring and pinion. The entire rear axle assembly is all new parts and the ring gear has a Chrysler part number. The loudest howl is on coast down and it disappears somewhat when applying throttle to accelerate. We have the rear axle completely apart to see what happened and have some white lead coming to do a gear pattern check. When we were in the disassembly stage we noticed both axle bearing retaining plates were bent from something not being right inside when they tightened the axle flange nuts. The axle was assembled with ball bearing type axle bearings with non-adjustable axle bearing retainers. My question is: Should I retain these ball bearings or convert back to stock tapered roller bearing type with a RS adjuster? I feel like this probably isn't my problem with the rear axle gear noise, just noticed the departure from stock and would like to order the best parts for reassembly.
 

R413

Well-Known Member
Local time
6:43 AM
Joined
Feb 4, 2019
Messages
3,580
Reaction score
7,245
Location
NW USA
I like the stock rear wheel bearings, it’s a great system. What sure grip does it have and is the center pin or buttons still inside..

If that was noisy from the ring and pinion it’s probably not going to ever be quiet.
 

Gus chiggins

Well-Known Member
Local time
9:43 AM
Joined
Jan 14, 2021
Messages
674
Reaction score
677
Location
Florida
If I'm not mistaken using the green bearings you have to discard the thrust blocks in the rear end. I believe they are called thrust blocks, or plates.
 

Cranky

Banned Henchman #27
Staff member
FBBO Gold Member
Local time
8:43 AM
Joined
Dec 4, 2009
Messages
28,985
Reaction score
30,575
Location
Down southeast Taxas
Generally, if the howl lightens up when you get on the gas, it's an indication that the pinion is too deep into the ring gear. IIRC, you asked this same question on another thread.....? Depending on how many miles are on the ring and pinion, you can reset the pinion and if they aren't broke in yet, they should quiet down some but it's a crap shoot. For your question, I've run both the Timkens and the Green bearings and don't have a complaint with either but iirc, you have an aftermarket LSD and it might not have or cannot use a center thrust pin with it.
 

justcruisin

Well-Known Member
Local time
8:43 AM
Joined
Jan 10, 2016
Messages
125
Reaction score
54
Location
New Zealand
If you have stock axles the thrust will be fine to be left in there with the green bearings but after market axles can be longer and cause an issue.
 

69Bee

FBBO Gold Member
FBBO Gold Member
Local time
7:43 AM
Joined
Nov 17, 2009
Messages
3,971
Reaction score
3,732
Location
Whetstone, AZ
If you have stock axles the thrust will be fine to be left in there with the green bearings but after market axles can be longer and cause an issue.
Without giving the red "X", I must disagree with that statement. My axles were stock, and I needed to remove the thrust buttons from the thrust block. The axles would not fit otherwise. It is widely known that "Green" axle bearings require the thrust buttons, not the thrust block, to be removed as the bearings set the axle placement.
 

Rusty34

FBBO Gold Member
FBBO Gold Member
Local time
9:43 AM
Joined
Apr 30, 2022
Messages
85
Reaction score
64
Location
Concord, NC
I apologize for repeating info in my earlier thread. I am trying to determine which parts to order and I had a question for some of the wise old owls here. Do you prefer the stock tapered roller bearings w/RS axle end play adjuster over the aftermarket non-adjustable ball bearing type axle bearings? I think the differential may be Auburn and the axles Moser.
 

69Bee

FBBO Gold Member
FBBO Gold Member
Local time
7:43 AM
Joined
Nov 17, 2009
Messages
3,971
Reaction score
3,732
Location
Whetstone, AZ
I used Green, and preferred them. Either/or, just like Cranky said. If you choose to go with Green, you need to know about the thrust button removal.
 

RemCharger

Well-Known Member
Local time
8:43 AM
Joined
Apr 5, 2014
Messages
3,887
Reaction score
3,629
Location
Sask
If the axles are Moser.. I would just use the green bearings.
 

justcruisin

Well-Known Member
Local time
8:43 AM
Joined
Jan 10, 2016
Messages
125
Reaction score
54
Location
New Zealand
Without giving the red "X", I must disagree with that statement. My axles were stock, and I needed to remove the thrust buttons from the thrust block. The axles would not fit otherwise. It is widely known that "Green" axle bearings require the thrust buttons, not the thrust block, to be removed as the bearings set the axle placement.

The 71 sure grips were a 489 case, they have the thrust block and are fine to run greens and the thrust. The 742 with buttons may be different I am not sure. I run greens and stock axles with the thrust in place in my 71. The axles seated down and I have had no issues. I also confirmed this with Cass from Dr Diff and he said that was not a problem. Regardless you will soon know when you come to slide the axles home and I only presume the OP has a 489 case, but all good info and something to check when you bolt up the retainers.
 

69Bee

FBBO Gold Member
FBBO Gold Member
Local time
7:43 AM
Joined
Nov 17, 2009
Messages
3,971
Reaction score
3,732
Location
Whetstone, AZ
The 71 sure grips were a 489 case, they have the thrust block and are fine to run greens and the thrust. The 742 with buttons may be different I am not sure. I run greens and stock axles with the thrust in place in my 71. The axles seated down and I have had no issues. I also confirmed this with Cass from Dr Diff and he said that was not a problem. Regardless you will soon know when you come to slide the axles home and I only presume the OP has a 489 case, but all good info and something to check when you bolt up the retainers.
I agree with you, and I just had a big explanation typed, but realized that I have slept a few times since doing it (green bearings) and honestly can't remember which axle got the green bearings when switched between a Dana 60 and an 8 3/4", and back to the Dana because the 8 3/4" was too light and had a hell of an axle hop.
 

451Mopar

Well-Known Member
Local time
7:43 AM
Joined
Oct 25, 2011
Messages
3,295
Reaction score
2,639
Location
Aurora, CO
When using the green bearings, you either have to remove the thrust block in the diff, or grind the axle end down a bit so the bearings are not trying to push each other out of the axle.
 
Top