2002 Sierra 1500 How to Tell Ring Gear Size UPDATED

2002 Sierra 1500 How to Tell Ring Gear Size

General Motors Differential Axle Codes

What is my rear differential ratio?

What rear end gear ratio exercise I have in my Chevrolet or GMC?

How do I find my rear end ratio?

The table below will assistance y'all determine what rear end ratio you have past using your RPO code, answering the question: What rear end ratio was in my Chevrolet or GMC vehicle when it left the factory. You can typically find your RPO lawmaking on driver side door panel or glove box.

General Motors rear end differentials are referred to by the diameter of the ring gear, i.due east. 7.v inch, 8.5 inch, 10.5 inch.  Our experts will help y'all discover the right band and pinion set for your particular application.  Give us a telephone call at 800-216-1632 to get started. We have a large selection of gear sets in stock and tin recommend the correct gear ratio to match your engine horsepower, transmission specs and tire size to give you the desired performance.

Switching your rear end gear ratio helps your gas mileage or improves your power!

Now you know your ring and pinion ratio to see parts that are available follow this link

If you lot're looking for amend gas mileage, y'all want to switch to a higher gear ratio.  If your looking for more power or performance, you would switch to a lower ratio.  It's merely backwards from the fashion we recollect, if you accept a iv.x ratio and need better fuel mileage you would switch to a 3.42 or iii.73 gear ratio.  If you take a 3.42 rear stop ratio and need more than towing ability y'all would switch to a 4.10 ratio .  If you have installed larger tires, they rob performance, and you lot would want to go to a lower ratio like a iv.56 or 4.88 depending upon your tire diameter.

Nosotros specialize in matching your tire size and ring and pinion ratio for your specific application and needs. Thinking about changing tire sizes? We tin can assistance! Consult our Await upwardly chart for determining engine RPM, gear ratio and tire size combination.  Larger tires on lifted truck suffer from loss of power, changing the ring gear and pinion to a lower ratio is the answer.

Why you demand a positraction?

Without positraction only one rear wheel receives the power.  In bad road conditions similar mud, ice or snow, power to one wheel is spring to go you stuck.  Installing a positraction distributes power to both wheels at the aforementioned time, causing a significant improvement in traction.  For positraction replacements and parts run into the following link.   Positraction units are available for many General Motor FWD Front Wheel Drive models.

A nautical chart is also provided which presents Differential cover/gasket shapes, which is a common technique to identifing differential ring gear diameter.  And a Dana/Spicer Parts illustration showing how to locate the Dana bill of material number is provided below. This is a critical number to ensure that you lot detect right Dana parts the commencement time.  For example, in some cases, Dana used 3 to 4 different band gear widths for a Dana 35 ring gear. So the set upward is not the same for each gear category.

RPO CODE	DESCRIPTION			RATIO
F16	TransAxle Final Drive			two.53
F17	TransAxle Last Drive			2.84
F18	TransAxle Final Drive			2.65
F25	TransAxle Concluding Bulldoze			3.32
F29	TransAxle Concluding Drive			ii.82
F36	Beam Front			2.xix
F45	Axle Front			2.93
F47	Beam Front			2.73
F57	Axle Front end			3.15
F62	TransAxle Terminal Drive			2.39
F67	TransAxle Last Drive			three.19
F68	TransAxle Final Drive			iii.45
F75	TransAxle Final Bulldoze			3.xviii
F77	TransAxle Final Drive			3.73
F79	TransAxle Last Bulldoze			2.97
F82	TransAxle Last Bulldoze			iii.23
F83	TransAxle Final Drive			iii.05
F90	Axle Front end			two.73
FA0	Rear			5.77
FA1	Rear 2 SPEED			4.88/6.94
FA2	Rear 2 SPEED			4.88/6.94
FH5	TransAxle Final Drive			two.81
FH6	Axle Front end			3.64
FH7	TransAxle Terminal Drive			four.12
FH8	Axle Front end			2.40
FH9	TransAxle Final Drive			2.60
FJ1	Axle Front			4.18
FJ2	Axle Front			iii.74
FJ3	TransAxle Final Drive			3.35
FJ4	Axle Front			4.53
FJ5	Axle Front			4.19
FJ7	Axle Front end			4.56
FP0	TransAxle Final Bulldoze			2.55
FP1	TransAxle Last Bulldoze			2.72
FP2	TransAxle Concluding Drive			iii.58
FP3	TransAxle Last Bulldoze			ii.73
FP4	TransAxle Final Drive			2.69
FP5	TransAxle Concluding Drive			2.95
FP6	TransAxle Terminal Drive			iii.54
FP7	TransAxle Final Drive			three.73
FP8	TransAxle Terminal Drive			three.54
FP9	TransAxle Terminal Bulldoze			3.54
FQ2	TransAxle Final Drive			3.48
FQ3	TransAxle Final Drive			2.86
FQ4	TransAxle Final Drive			3.57
FQ6	TransAxle Last Drive			4.12
FQ8	TransAxle Concluding Drive			two.96
FQ9	TransAxle Final Drive			iii.21
FR2	TransAxle Terminal Bulldoze			2.93
FR3	TransAxle Final Bulldoze			3.69
FR6	TransAxle Terminal Drive			3.84
FR7	TransAxle Last Drive			3.95
FR8	Axle Front end			4.17
FR9	TransAxle Final Drive			three.29
FV0	TransAxle Final Drive			3.67
FV1	TransAxle Final Drive			3.72
FV2	TransAxle Final Drive			4.18
FV3	TransAxle Final Bulldoze			3.eleven
FV4	TransAxle Final Drive			iii.71
FV5	TransAxle Final Drive			iv.nineteen
FV6	TransAxle Final Drive			4.24
FV7	TransAxle Last Drive			4.29
FV8	TransAxle Final Bulldoze			four.31
FV9	TransAxle Final Drive			4.53
FVO	TransAxle Terminal Drive			three.67
FW2	TransAxle Terminal Bulldoze			iii.06
FW3	TransAxle Concluding Drive			4.02
FW4	TransAxle Final Drive			3.89
FW5	TransAxle Final Drive			iv.10
FW6	TransAxle Final Drive			3.42
FW7	TransAxle Final Bulldoze			3.83
FW8	TransAxle Final Drive			4.28
FW9	TransAxle Final Bulldoze			3.43
FWS	TransAxle Final Bulldoze			4.ten
FX1	TransAxle Last Bulldoze			3.94
FX2	TransAxle Final Drive			2.66
FX4	TransAxle Final Drive			3.35
FX8	TransAxle Final Bulldoze			3.61
FY1	TransAxle Concluding Drive			two.36
FY3	TransAxle Final Bulldoze			iii.79
FY5	TransAxle Final Drive			iii 52
G11	TransAxle Concluding Drive			two.56
G44	Beam Rear			iii.07
G72	Axle Rear			2.fourteen
G75	Beam Rear			3.62
G76	Positraction Rear
G80	Axle Positraction, Express Slip
G81	Positraction Rear Beam
G82	Axle Rear			4.56
G84	Axle Rear			four.10
G86	Axle , Rear, Express Slip
G87	Ring Gear, 8.l Inch
G89	Band Gear, 7.50 Inch
G90	Rear			3.xv
G91	Special Highway Rear Axle			3.08
G94	Axle Rear			three.31
G96	Beam Rear			iii.55
G97	Axle Rear			ii.73
GH0	Beam Rear			iii.54
GH2	Axle Rear			2.29
GH3	Axle Rear			2.77
GH4	Axle Rear			ii.92
GH7	Axle Rear			ii.73
GJ1	Axle Rear			five.38
GJ2	Beam Rear			five.thirteen
GK7	Axle Rear			4.78
GK8	Axle Rear			iv.33
GK9	Axle Rear			4.63
GL0	Beam Rear			five.13
GL3	Axle Rear			6.17
GM1	Axle Rear			2.59
GM2	Axle Rear			3.44
GM3	Beam Rear			3.45
GM4	Beam Rear			iii.67
GM5	Axle Rear			3.89
GM6	Axle Rear			4.22
GM7	Beam Rear			3.68
GM8	Axle Rear			ii.56
GN9	Axle Rear			iv.11
GS1	Axle Rear			ii.73
GS3	Axle Rear			3.73
GS4	Axle Rear			3.70
GS5	Axle Rear			4.11
GS6	Beam Rear			iv.56
GS8	Axle Rear			3.94
GT1	Axle Rear			2.56
GT2	Axle Rear			2.29
GT4	Axle Rear (DUP of RPO Code 5X1)			iii.73
GT5	Beam Rear (DUP of RPO GT8)			4.10
GT7	Axle Rear			three.33
GT8	Axle Rear (DUP of RPO GT5)			4.10
GU1	Beam Rear			ii.41
GU2	Axle Rear			2.73
GU3	Axle Rear			2.93
GU4	Axle Rear			3.08
GU5	Beam Rear			3.23
GU6	Axle Rear			3.42
GU7	Axle Rear			2.77
GU8	Axle Rear			iii.90
GU9	Beam Rear			3.91
GV0	Axle Rear			3.55
GV1	Axle Rear			2.73
GV2	Axle Rear			5.83
GV3	Axle Rear			3.08
GV4	Beam Rear			three.36
GV5	Axle Rear			3.55
GV7	Axle Rear			four.11
GV8	Axle Rear			2.72
GV9	Axle Rear			four.25
GW2	Axle Rear			two.56
GW3	Axle Rear			ii.56
GW4	Axle Rear			iii.31
GW5	Beam Rear			2.73
GW6	Axle Rear			3.27
GW8	Axle Rear			4.10
GW9	Axle Rear (DUP of RPO GU3)			ii.93
GX1	Axle Rear			3.70
GX2	Axle Rear			iii.07
GX3	TransAxle Final Drive			three.33
GX4	Beam Rear			three.75
GX5	Axle Rear			4.09
GX6	Axle Rear			iii.53
GX8	TransAxle Terminal Drive			3.74
GY2	Axle Rear			3.31
GY3	TransAxle Final Drive			iv.29
GY4	Axle Rear			4.53
GY5	Beam Front			3.65
GY7	TransAxle Last Drive			four.18
GY9	Axle Rear			4.31
GYS	TransAxle Final Drive			3.65
H01	Beam Rear			three.07
H04	Beam Rear, Unmarried SPEED			4.11
H05	Axle Rear			3.73
H12	Axle Rear, 21000 LBS, EATON 21065S, Single SPEED
H42	Axle Rear			half dozen.17
H43	Axle Rear			5.43
HA3	Beam Rear, SINGLE SPEED			5.29
HC4	Axle Rear			4.56
HC7	Axle Rear, 7500 LBS, SINGLE SPEED			5.13
HC8	Axle Rear, Unmarried SPEED, TRUCK			iii.21
HC9	Axle Rear			5.thirteen
HE3	Beam Rear, 3500 LBS, SINGLE SPEED,			three.07
HE4	Axle Rear			3.40
HF7	Axle Rear, 10000 LBS, DANA 70, Single			4.56
HF8	Axle Rear			iv.88
HJ1	Axle Rear			4.55
HJ2	Axle Rear			5.86
HJ3	Beam Rear			four.75
HJ4	Axle Rear			6.50
HJ5	Axle Rear			5.57
HJ6	Axle Rear			4.78
HJ7	Axle Rear			iv.88
HK1	Axle Rear			2.87
HK3	Axle Rear			6.xiv
HK9	Axle Rear 10000 LBS, SINGLE SPEED			five.86
HO4	Axle Rear			4.11
HO6	Axle Rear			four.63

The following effigy presents differential embrace and gasket shapes. Counting embrace bolts and embrace shapes is a common method to determine which ring gear diameter and differential you lot have in your rear bike drive RWD vehicle. See the below paragraph before selecting the right Dana parts.

When ordering Dana Spicer Differential Parts, provide a bill of cloth number. This number is stamped on the right hand side axle tube of your rear finish. It's a number like: 603XX-X, 604XX-10 or 605XX-X. With this number, you lot tin can tell exactly what components the factory used in the assembly of your rear finish.

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2002 Sierra 1500 How to Tell Ring Gear Size UPDATED

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