The 2022 Mustang GT Premium California Special specs show it comes with a Torsen Rear-End:
2022 Ford Mustang GT California Special (topspeed.com)
This is pretty much normal behavior for the Torsen, as mine also does this exact same thing occasionally.
Up for sale is a fresh built 3.55 Ratio Rear End
This Rear End was assembled with the following New Parts:
New FoMoCo Aluminum Carrier/Housing
New Ford Performance 3.55 Ring and Pinion
New FoMoCo Traction Loc Differential Assy
ALL New Bearings and Seals
Has the 110mm ID Pinion Flange, (Fits...
Very Nice Aluminum Carrier 3.15 ratio Mustang Rear End
Traction Loc Differential
From -Low Mileage, Automatic Trans, Mustang-
Completely Gone-Through, Cleaned, and Renewed
New Pinion Seal and Bearings
Price: $600.00 , (Prefer Local Pickup)
I just finished building this beauty.
Torsen T-2R differential
New US Gear (Lightning) 4.11 Ring and Pinion (Isotropic treatment)
All new bearings and seals
Price: $2,000.00 (Prefer Local Pickup)
Please PM me for more detail info, photos of build, setup specs, etc.
I believe some of the bolt replacement is because of Legal.
I worked in the Ford garage back in the 70’s & 80’s. Very few suspension bolt replacements were called for in the Ford repair manual. After a few law suits and now bolt replacements everywhere.
The Flanges are interchangeable to the pinion shaft. Its only the driveshaft mounting that is different.
Either way you prefer would work. Both ways, you need to be careful not to crush the collapsible spacer any more & end-up with too much preload on the pinion bearings.
That gear pattern does not look good at all.
Drive-Side way to low (towards the toe of the gear)
Coast side is way too high (towards the top/crown of the gear.
No way that would not make noise.
When you are rolling pattern, hold pinion with your hand or a rag wrapped around pinion to give some...
You should have had to pry the diff/ring gear out of the housing with 2 pry bars.
Should not have been that easy.
Could you tell if the Pinion flange had been off before,? The factory “stakes” the pinion nut to the shaft after preload. Was that nut staked on both sides before you took the nut off ?
A new crush sleeve will only be about 1/16” longer than a collapse one. Set them side by side on a perfectly flat surface. Then take a straight-edge and place across the new one, the old one should slide under the straight-edge. Then you will see it doesn’t take much to be collapsed. If you...
My 2016 GT350 Non-MagnaRide Rear Springs
Spring Diameter: .750
Spring Rate: 914
Left Rear PN: FR3Z-5560-S
Right Rear PN: FR3Z-5560-N
Of course the RR spring on the GT350 is wound in the opposite direction.
To Fit GT350 rear springs on S550 mustangs, it takes (2) LR springs from a GT350