Availability
1973 PONTIAC FIREBIRD Differential & Rear-End Components
Spool, Mini, Steel, 28-Spline, 10-Bolt, GM 8.5 in., Each
Part Number: RMG-78-1028-1
Estimated Ship Date: Today
Estimated Ship Date: Today
Differential Crush Sleeves, Steel, Fits with Aftermarket Ring and Pinion Set Only, Buick, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Each
Part Number: MGR-9785792
Estimated Ship Date: Today
Estimated Ship Date: Today
Differential Carrier, Spartan Locker, Steel, 30-spline, Rear, GM 8.5 in., Each
Part Number: SPZ-17041
Not Yet Reviewed
Estimated Ship Date: Mar 30, 2026 if ordered today
Estimated Ship Date: Mar 30, 2026 if ordered today
Gear, Ring and Pinion, 5.57:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set
Part Number: RMG-6901751
Estimated Ship Date: Today
Estimated Ship Date: Today
Ring and Pinion Installation Kit, GM, 8.5 in., 10-Bolt, Kit
Part Number: RNB-697-100
Estimated Ship Date: Apr 6, 2026 if ordered today
Estimated Ship Date: Apr 6, 2026 if ordered today
Axle Assembly, Narrowed, Ford 9 in., Black, 1541H Steel, 31 Spline Axles, F-Body, Second Gen, for use with QA1 4-Link, Chevy, Pontiac, Kit
Part Number: QA1-R902N
Not Yet Reviewed
Estimated Ship Date: Apr 2, 2026 if ordered today
Estimated Ship Date: Apr 2, 2026 if ordered today
Differential Cross Shaft, Steel, 0.795 in. Diameter, Each
Part Number: YGA-33401
Estimated Ship Date: Today
Estimated Ship Date: Today
Axle Assemblies, Ford 9 in., Natural, 61.25 in. Flange to Flange, 31-Spline Axles, 1541H Alloy, Chevy, Pontiac, Kit
Part Number: ART-11179680
Not Yet Reviewed
Estimated Ship Date: Apr 3, 2026 if ordered today
Estimated Ship Date: Apr 3, 2026 if ordered today
8.5" GM PINION KIT, KOYO BRGS
Part Number: SPZ-60012
Not Yet Reviewed
Estimated Ship Date: Mar 30, 2026 if ordered today
Estimated Ship Date: Mar 30, 2026 if ordered today
Ring and Pinion Installation Kit, Basic, GM 8.5 in., Front/Rear, Kit
Part Number: MGR-R10RTPK
Not Yet Reviewed
Estimated Ship Date: Apr 3, 2026 if ordered today
Estimated Ship Date: Apr 3, 2026 if ordered today
Differential Carrier Rebuild Kits and Spider Gears, GM 8.5 in., Side Gears, Rear, Open, 28-spline, 10-bolt, GM 8.5 in., Kit
Part Number: SVL-10020477
Not Yet Reviewed
Estimated Ship Date: Mar 30, 2026 if ordered today
Estimated Ship Date: Mar 30, 2026 if ordered today
Ring and Pinion Gears and Installation Kit, 8.5" GM 4.11 REAR R&P GEAR/ INSTALL KIT PACKAGE with 28spl POSI & AK 1563 AXLE BRGS (2.25" OD)
Part Number: YGA-12630
Not Yet Reviewed
Estimated Ship Date: Apr 16, 2026 if ordered today
Estimated Ship Date: Apr 16, 2026 if ordered today
Mini Spool; Differential Pinion Shim; Fits Ford 7.5 in./Ford 8.8 in./GM 8.5 in.
Part Number: RMG-16-0090-1
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Mini Spool, Steel, 28-spline, 10-bolt, GM 8.5 in., Each
Part Number: YGA-32232
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
Axle Shaft, 28-Spline, 30.125 in. Length, Chevy, Each
Part Number: YGA-21242
Estimated Ship Date: Today
Estimated Ship Date: Today
Ring & Pinion Gear, 5.38 Ratio, GM, 8.5 in./8.6 in., Set
Part Number: YGA-24494
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
Yukon 1541H alloy rear axle for 8.2" and 8.5" GM passenger
Part Number: YGA-21243
Not Yet Reviewed
Estimated Ship Date: Apr 14, 2026 if ordered today
Estimated Ship Date: Apr 14, 2026 if ordered today
RING GEAR BOLT EACH
Part Number: MGR-PB179-2-L
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Full Size Spool, GM 8.5 in. 10 Bolt, 33 Spline, C-Clip Elim.Req'd., Steel
Part Number: RMG-81-1033-1
Not Yet Reviewed
Estimated Ship Date: Apr 3, 2026 if ordered today
Estimated Ship Date: Apr 3, 2026 if ordered today
Differential Clutch, Steel Pack, Rear, Posi, GM, 8.875 in., Set
Part Number: YGA-16064
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Spacer, Replacement, Active Spacer, Each
Part Number: PWT-624004SDG2
Not Yet Reviewed
Estimated Ship Date: May 4, 2026 if ordered today
Estimated Ship Date: May 4, 2026 if ordered today
Ring and Pinion Gear Installation Kit, Bearing Overhaul, 30 Spline, GM 8.5 in., Kit
Part Number: YGA-11067
Not Yet Reviewed
Estimated Ship Date: Apr 14, 2026 if ordered today
Estimated Ship Date: Apr 14, 2026 if ordered today
Differential, Grip Pro Traction System, 28-Spline, GM 8.5 in., Each
Part Number: PWT-GT201028
Not Yet Reviewed
Estimated Ship Date: May 4, 2026 if ordered today
Estimated Ship Date: May 4, 2026 if ordered today
Estimated Ship Date: Today
Spool, Full Size, Steel, 30-Spline, 10-Bolt, GM 8.5 in., Each
Part Number: RMG-81-1030-1
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
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