Home > GENERAL MOTORS > Differential Covers >   GM 8½" and 8 5/8" Ring Gear, 10 Bolt Differential Covers
	Our Price: $165.00 Product Code: 10815 Finish Click to view another Finish As-Cast Finish Black Powder Coat [Add $45.00] Polished [Add $110.00]

Description   This PML diff cover fits the rear end differential on many GM, GMC, and Chevrolet vehicles. Typical applications include the following. Be aware that for each model and year there may be more than one rear axle possible. See also GM 10 bolt 7.5 and GM 14 bolt 9.5. ½ Ton Trucks, 1979 to Current: C10 & K10 C1500 & K1500 Silverado 1500 Sierra 1500 ¾ Ton Trucks, 1979 to 1998: C20 & K20 C2500 & K2500 ½ Ton Vans, 1979 to Current: Vandura Express Savana G1500 ¾ Ton Vans, 1979 to Current: Vandura Express Savana G2500 Full Size Blazer, 1977 to 1994 GMC Jimmy, 1977 to 1991 Tahoe & Yukon, 1992 to Current, check for panhard bar Avalanche 1500 Suburban 1500, 1982 to 2006 Hummer H3 Note that these covers will not fit the front axle 10 bolt 8 1/2" ring gear differential found on some 4wd Chevy and GMC SUVs and trucks. The boss on the side of P/N 10815 can optionally be machined for temperature sensor for $40 additional (call to order machining and let us know your sensor thread size). Bolt Info: GM has used four different bolts on these differentials so to complete your order, we need to know which bolts you have. These differentials have used both metric and standard cover bolts. The bolt length has not been consistent either. When ordering one of these covers, you will need to pull one of your stock bolts out (a top bolt is best) and measure the length and determine whether it is metric or standard. Metric bolts will have 1.25 threads per mm (20 threads per inch), standard ones will have 18 threads per inch. Also, a bolt head with lines or letters on it is typically standard. A bolt with numbers such as 5.8, 9.8, 10.9, or 12.9 is likely to be metric. Bolt length is measured from the underside of the head (where a washer would sit) to the tip. If the bolts are metric, the length will be 21mm or 16mm. If the bolt is standard, the length will be 5/8 inch or 7/8 inch. So there are four different bolts possible with these differentials. Be sure to order the correct one for your vehicle. When you look at the ordering selections above, the last number is the length and the middle number is the threads per inch or mm. We know this is a hassle, but we do not want to send the wrong bolts or charge everyone a lot of extra money to cover sending all possible bolts with each cover. When you get your cover, it will include bolts that are longer than the stock bolts since the flange on PML's cover is much thicker than stock. Our bolts are 3/8-inch or 9mm longer than stock bolts. The bolts with the stock cover will not work. Volume: 0.5 qt. over stock PML Differential Cover Features: Increased oil capacity for cooler temperatures Sand-cast aluminum with raised fins 3/16-inch thick wall construction to add strength to differential housing 3/8-inch thick gasket flange will not bend when bolts are tightened Machined gasket surface for a secure seal using RTV or factory reusable gasket Oil changes without removing the cover All hardware provided, including magnetic drain plug

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