What kind of rear differential does a GMC have?
While this article focuses specifically on the GM 8.5″ 10-bolt rear differential, the parts and processes described herein cover most differential housings. Built from the 1970s through today (the 8.6” 10-bolt is still used in most GM trucks), these housings are the most common on the road, especially for trucks.
How to change rear differential fluid in a Silverado?
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Where are the ears on a GM 8.5 ” rear differential?
All 8.5” 10-bolt rears have two squared-off ears at the 4 and 6-o’clock on the bottom of the pumpkin, that is the #1 tell-tale sign, if you don’t have those, you don’t have an 8.5” 10-bolt. Up until 1988, all GM 8.5” 10-bolts had 28-spline axles, which are thinner than and not as strong as the upgraded 30-spline axles.
How does a disassembly of a GM differential work?
Once the axle shafts have been removed, you can lift the ring gear and carrier out of the center section. Then the carrier disassembly can commence. Although other components do not have to be aligned, you need to keep the inner pinion bearing properly aligned. This bearing is pressed on and removing the bearing instantly changes alignment.
While this article focuses specifically on the GM 8.5″ 10-bolt rear differential, the parts and processes described herein cover most differential housings. Built from the 1970s through today (the 8.6” 10-bolt is still used in most GM trucks), these housings are the most common on the road, especially for trucks.
How do you change the rear differential fluid?
Changing differential fluid may not seem like something a novice can do, but in reality it’s very easy. 1. Park the truck on a level surface, ensure that it is in Park, and set the brake. 2. Crawl under the truck, and identify the rear differential. It should look similar to this picture: 3. Open the filler plug.
What kind of differential fluid do I need for a Silverado?
Cliff demonstrates this process on a 3rd gen Silverado (2014) with the 9.5 inch rear axle using AMSOIL Severe Gear 75W-90 differential fluid. Note that GM recommends 75w-85 for the silverado 1500 but I went with AMSOIL’s recommendation given the quality of their fluid. GM recommends 75w-90 for 2500 and 3500 rears.
All 8.5” 10-bolt rears have two squared-off ears at the 4 and 6-o’clock on the bottom of the pumpkin, that is the #1 tell-tale sign, if you don’t have those, you don’t have an 8.5” 10-bolt. Up until 1988, all GM 8.5” 10-bolts had 28-spline axles, which are thinner than and not as strong as the upgraded 30-spline axles.