Axles - Differentials | 2004.5-2005 GM 6.6 Duramax LLY

The 2004.5-2005 Duramax equipped 2500HD and 3500 trucks feature an IFS (Independent Front Suspension) AAM 9.25" assembly up front and an AAM 11.5 out back. From the factory, these housings were typica ... read more

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Yukon Gear & Axle GM & Dodge 11.5" Ring and Pinion YUK-YG_GM115-373-Main 0.00

Yukon Gear & Axle YG GM11.5-373

Yukon Gear & Axle GM & Dodge 11.5" Ring and Pinion $ 614.89 2050-01-01

Looking to upgrade your AAM 11.5" ring and pinon to keep your truck performing with bigger tires? Grab this Yukon Ring and Pinon and be amazed with the quality and durability! Yukon Gear & Axle GM 9.25" IFS Ring and Pinion Gear Set 01-19 GM Duramax YUK-YG_GM925-342R-Main 0.00

Yukon Gear & Axle YG GM9.25-342R

Yukon Gear & Axle GM 9.25" IFS Ring and Pinion Gear Set 01-19 GM Duramax $ 392.89 2050-01-01

Looking to upgrade your AGM's AAM 9.25 ring and pinon to keep your truck performing with bigger tires? Grab this Yukon Ring and Pinon and be amazed with the quality and durability! Yukon Master Overhaul Kit for 11.5" Differential 03-10 Ram HD / 01-10 GM and Dodge 11.5" YUK-YK_GM115 11.56

Yukon Gear & Axle YK GM11.5

Yukon Master Overhaul Kit for 11.5" Differential 03-10 Ram HD / 01-10 GM and Dodge 11.5" $ 709.89 2050-01-01

Power Products carries the Yukon Master Overhaul Kit for GM and Dodge 11.5" differential Yukon Master Overhaul Kit 1992-2010 GM 9.25" IFS GM 9.25" IFS YUK-YK_GM925IFS-A 9.09

Yukon Gear & Axle YK GM9.25IFS-A

Yukon Master Overhaul Kit 1992-2010 GM 9.25" IFS GM 9.25" IFS $ 644.89 2050-01-01

Power Products carries the Yukon Master Overhaul Kit 1992-2010 GM 9.25" IFS Yukon 30 Spline 1541H Rear Axle Shaft 01-10 GM 2500HD / 3500 YUK-YA_G12471486 16.29

Yukon Gear & Axle YA G12471486

Yukon 30 Spline 1541H Rear Axle Shaft 01-10 GM 2500HD / 3500 $ 647.89 2050-01-01

Power Products carries the Yukon Rear Axle for GM 11.5" ('00 and newer) with a length of 35.94" and 30 splines Yukon Rear Axle for GM 10.5/11.5 , 38 Spline, 4340 (38.2" to 42.2") GM 10.5/11.5 , 38Spline, 4340 (3 YUK-YA_WGM14T-38-42 25.00

Yukon Gear & Axle YA WGM14T-38-42

Yukon Rear Axle for GM 10.5/11.5 , 38 Spline, 4340 (38.2" to 42.2") GM 10.5/11.5 , 38Spline, 4340 (3 $ 608.89 2050-01-01

Power Products carries the Yukon Rear Axle for GM 10.5/11.5 , 38Spline, 4340 (38.2" to 42.2") Yukon Rear Axle for GM 10.5/11.5 , 38 Spline, 4340 (34.8" to 38.8") GM 10.5/11.5 , 38Spline, 4340 (3 YUK-YA_WGM14T-38-38 23.58

Yukon Gear & Axle YA WGM14T-38-38

Yukon Rear Axle for GM 10.5/11.5 , 38 Spline, 4340 (34.8" to 38.8") GM 10.5/11.5 , 38Spline, 4340 (3 $ 568.24 2050-01-01

Power Products carries the Yukon Rear Axle for GM 10.5/11.5 , 38Spline, 4340 (34.8" to 38.8") Yukon Grizzly Locker AAM 11.5" Rear 30 Spline Dodge YUK-YGLGM115-30 43.43

Yukon Gear & Axle YGLGM11.5-30

Yukon Grizzly Locker AAM 11.5" Rear 30 Spline Dodge $ 1456.89 2050-01-01

Power Products carries the Yukon Grizzly Locker - Dodge / GM AAM 11.5" Rear 30 Spline Yukon Master Overhaul Kit 1999-2010 GM 14 Bolt 10.5" GM 14bolt 10.5" YUK-YK_GM14T-C 10.40

Yukon Gear & Axle YK GM14T-C

Yukon Master Overhaul Kit 1999-2010 GM 14 Bolt 10.5" GM 14bolt 10.5" $ 549.89 2050-01-01

Yukon Master Overhaul Kit for your 1999-2010 GM is one of the most comprehensive and complete kits on the market featuring Timken Bearings and Races. ARB On-Board High Performance 12 Volt Air Compressor ARB-CKSA12 8.00

ARB CKSA12

ARB On-Board High Performance 12 Volt Air Compressor $ 241 2050-01-01

This permanently mounted air compressor is specifically designed to be used with the installation of ARB Air Lockers. This kit comes complete with a full wiring loom with air locker solenoid plug in contact, mounting hardware with reinforcing bracket, and a quality compressor isolating switch. ARB CKMA12 On-Board High Performance 12 Volt Air Compressor ARB-CKMA12 12.00

ARB CKMA12

ARB CKMA12 On-Board High Performance 12 Volt Air Compressor $ 338 2050-01-01

The ARB Heavy Duty Compressor is a life saver by delivering available air on tap whenever you need it. ARB On-Board High Performance 12 Volt Twin Air Compressor ARB-CKMTA12 22.00

ARB CKMTA12

ARB On-Board High Performance 12 Volt Twin Air Compressor $ 616 2050-01-01

The ARB Twin Air Heavy Duty Compressor is a life saver by delivering available air on tap whenever you need it.

Description

The 2004.5-2005 Duramax equipped 2500HD and 3500 trucks feature an IFS (Independent Front Suspension) AAM 9.25" assembly up front and an AAM 11.5 out back. From the factory, these housings were typically stuffed with the popular 3.73 ratio, but also had other options, such as a 4.10 used primarily for heavier towing, in most cases.

Over the years, these assemblies have proven themselves relatively reliable on moderately used trucks running stock, or close to stock tire size and power output. For those of us that demand substantial power increases and larger tires, there is room for improvement to improve the reliability and performance that they can afford. One of the best upgrades we can recommend for anyone that has increased tire size, is that of a ring and pinion ratio upgrade. As previously stated, most of these trucks came factory with a 3.73 ratio, designed to have a proper run out with a stock size tire (245-75R-16 specifically, or 30.5" equivalent). But as soon as you upgrade to a 35" or larger tire, all of a sudden your RPM vs. speed are effected, even causing a disruption of the shift pattern on automatic transmission equipped trucks.

Lets give the example of upgrading to a 35" tire. By using cross multiplication, we can determine that in order to have the same RPM vs. speed as with the factory tire size, you would want to install a 4.28 gear ratio (3.73/30.5*35). Unfortunately, in this scenario there is no such thing as a 4.28 ratio, but darn close would be a 4.10 that is readily available. Or, you can also opt to go with a slightly lower ratio of 4.56 that would give you a higher RPM vs. speed compared to stock, which is especially useful for those towing frequently.

Besides replacing the ring and pinion, we also offer numerous other upgrades, such as ARB Air Lockers, rebuild kits, and so much more. As always, if you have any questions about which product is right for you and your truck don't hesitate to give us a call or send us an e-mail to [email protected] and we would be happy to help.

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