Off Roading
Mud Bogging
Rock Crawling
Towing
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Drag Racing
Street to Strip
Eaton Posi® performance differentials have been setting the standard for durability and performance for nearly 40 years. Utilization of net-forged spider and side gear assemblies enhances greater load carrying capacity. This fully rebuildable unit also incorporates carbon fiber faced steel clutch packs for smooth, chatter free operation.
Reider Differential Rating
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Differentials - Eaton Posi
Eaton Posi
Part Number
Application 
Ratio
Spline
60D/P330
Dana 60
4.10-
30
60D/P430
Dana 60
4.56+
30
F10/P4
FORD 10.25/10.50
ALL
30
F88/P428
FORD 8.8"
ALL
28
F88/P431
FORD 8.8"
ALL
31
F97/P4
FORD 9.75"
ALL
34
GM7/P426
GM 7.5" & 7.625"
3.23+
26
GM7/P428
GM 7.5" & 7.625"
3.23+
28
GM9/P4
GM 9.5"
ALL
33
GM10/P4
GM 10 BOLT 8.5"*
2.73+
28
GM10/P4BP
BUICK/PONTIAC 8.2"
3.36+
28
GM10/P4E
CHEVROLET 10 BOLT
3.08+
28
GM10/P430
GM 10 BOLT 8.5"*
2.73+
30
GM12/P3CS
CHEVROLET CAR 12 BOLT 8.875"
3.08-3.73
30
GM12/P3PG
CHEVY 55-64 8.2" CAR
3.90+
17
GM12/P3S
CHEVROLET/GMC TRUCK 12 BOLT 8.875"
2.76-3.42
30
GM12/P4CS
CHEVROLET CAR 12 BOLT 8.875"
3.90+
30
GM12/P4S
CHEVROLET/GMC TRUCK 12 BOLT 8.875"
3.73+
30
GM14/P3
CHEVROLET TRUCK 14 BOLT 10.5
4.10-
30
GM14/P4
CHEVROLET TRUCK 14 BOLT 10.5
4.56+
30
MIT/P4
MITSUBISHI MONTERO SPORT
4.62
24
TAC/P4
TACOMA 4WD REAR
ALL
30
VETT/P3
EATON POSI
3.90-
17
VETT/P4
EATON POSI
4.10+
17
Eaton Posi Applications:
Reider Differential Legend