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Applications for RMG-12BT308
Richmond Gear EXCel Ring and Pinion Sets 12BT308 GM 8.875 in. (12-bolt) truck 3.08 Gears
RMG-12BT308
Part Number: RMG-12BT308
Estimated Ship Date from OH, NV, GA: Monday 10/19/2026
Filters
Results Found: 48
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1975
Ending Year:
1975
Engine Type:
L6
Engine Size:
4.1L/250
Engine Family:
CHEVROLET L6 GAS
Axle Location:
Rear
Liter:
4.1
CID:
250
Application Notes:
3.08 Ratio Ring and Pinion for a Rear GM 8.875" Truck Differential; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Q
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.7
CID:
350
Application Notes:
3.08 Ratio Ring and Pinion for a Rear GM 8.875" Truck Differential; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Engine Size:
7.4L/454
Engine Family:
Chevy big block Mark IV
Axle Location:
Rear
Liter:
7.4
CID:
454
Application Notes:
3.08 Ratio Ring and Pinion for a Rear GM 8.875" Truck Differential; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Z
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1975
Ending Year:
1976
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.7
CID:
350
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
V
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1975
Ending Year:
1978
Engine Type:
L6
Engine Size:
4.8L/292
Engine Family:
CHEVROLET L6 GAS
Axle Location:
Rear
Liter:
4.8
CID:
292
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
T
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1976
Ending Year:
1976
Engine Type:
V8
Engine Size:
6.6L/400
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
6.6
CID:
400
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
U
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1976
Ending Year:
1976
Engine Type:
V8
Engine Size:
7.4L/454
Engine Family:
Chevy big block Mark IV
Axle Location:
Rear
Liter:
7.4
CID:
454
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.7
CID:
350
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Engine Size:
7.4L/454
Engine Family:
Chevy big block Mark IV
Axle Location:
Rear
Liter:
7.4
CID:
454
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
S
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1977
Ending Year:
1978
Engine Type:
L6
Engine Size:
4.1L/250
Engine Family:
CHEVROLET L6 GAS
Axle Location:
Rear
Liter:
4.1
CID:
250
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
D
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1977
Ending Year:
1978
Engine Type:
V8
Engine Size:
5.0L/305
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.0
CID:
305
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
U
Region:
USA
Make:
GMC
Model:
C25
Submodel:
BASE
Beginning Year:
1977
Ending Year:
1978
Engine Type:
V8
Engine Size:
6.6L/400
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
6.6
CID:
400
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1975
Ending Year:
1975
Engine Type:
L6
Engine Size:
4.1L/250
Engine Family:
CHEVROLET L6 GAS
Axle Location:
Rear
Liter:
4.1
CID:
250
Application Notes:
3.08 Ratio Ring and Pinion for a Rear GM 8.875" Truck Differential; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Q
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.7
CID:
350
Application Notes:
3.08 Ratio Ring and Pinion for a Rear GM 8.875" Truck Differential; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1975
Ending Year:
1975
Engine Type:
V8
Engine Size:
7.4L/454
Engine Family:
Chevy big block Mark IV
Axle Location:
Rear
Liter:
7.4
CID:
454
Application Notes:
3.08 Ratio Ring and Pinion for a Rear GM 8.875" Truck Differential; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Z
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1975
Ending Year:
1976
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.7
CID:
350
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
V
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1975
Ending Year:
1978
Engine Type:
L6
Engine Size:
4.8L/292
Engine Family:
CHEVROLET L6 GAS
Axle Location:
Rear
Liter:
4.8
CID:
292
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
T
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1976
Ending Year:
1976
Engine Type:
V8
Engine Size:
6.6L/400
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
6.6
CID:
400
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
U
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1976
Ending Year:
1976
Engine Type:
V8
Engine Size:
7.4L/454
Engine Family:
Chevy big block Mark IV
Axle Location:
Rear
Liter:
7.4
CID:
454
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Y
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Engine Size:
5.7L/350
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.7
CID:
350
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
L
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1976
Ending Year:
1978
Engine Type:
V8
Engine Size:
7.4L/454
Engine Family:
Chevy big block Mark IV
Axle Location:
Rear
Liter:
7.4
CID:
454
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
S
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1977
Ending Year:
1978
Engine Type:
L6
Engine Size:
4.1L/250
Engine Family:
CHEVROLET L6 GAS
Axle Location:
Rear
Liter:
4.1
CID:
250
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
D
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1977
Ending Year:
1978
Engine Type:
V8
Engine Size:
5.0L/305
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
5.0
CID:
305
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
U
Region:
USA
Make:
GMC
Model:
C25
Submodel:
HIGH SIERRA
Beginning Year:
1977
Ending Year:
1978
Engine Type:
V8
Engine Size:
6.6L/400
Engine Family:
Chevy small block Gen I
Axle Location:
Rear
Liter:
6.6
CID:
400
Application Notes:
Differential Ring and Pinion; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
R
Region:
USA
Make:
GMC
Model:
C25
Submodel:
SIERRA CLASSIC
Beginning Year:
1975
Ending Year:
1975
Engine Type:
L6
Engine Size:
4.1L/250
Engine Family:
CHEVROLET L6 GAS
Axle Location:
Rear
Liter:
4.1
CID:
250
Application Notes:
3.08 Ratio Ring and Pinion for a Rear GM 8.875" Truck Differential; For GM 8.875" (12 Bolt); 3.08 Ratio; Requires a 2.76 to 3.42 Ratio Carrier
Engine VIN Code:
Q
Region:
USA
