PML Differential Cover for GM 7½" and 7 5/8" Ring Gear, 10 Bolt, Straight Fins

Part Number 6086

PML makes two differential covers for the GM 7½, 7 5/8 inch 10 bolt rear end. See both PML GM 7½" rear differential covers to compare.

As-cast finish
$200.00

8mm-1.25x21 bolts:

8mm-1.25x16 bolts:

5/16in-18x7/8 bolts:

5/16in-18x5/8 bolts:

Black powder coating
$270.00

8mm-1.25x21 bolts:

8mm-1.25x16 bolts:

5/16in-18x7/8 bolts:

5/16in-18x5/8 bolts:

Polished finish
$375.00

8mm-1.25x21 bolts:

8mm-1.25x16 bolts:

5/16in-18x7/8 bolts:

5/16in-18x5/8 bolts:

Click on the button under the bolt size you need to order the differential cover. Scroll down for more information on bolts.

Volume: 0.5 qt. over stock, approximately

Dimensions: Click here for dimensions. A separate window or tab will open.

Applications

This diff cover fits the GM with 7 1/2" (7.5") or 7 5/8" (7.625") ring gear 10 bolt differential. Typical applications include the following. Be aware that for each model and year there maybe more than one rear axle possible. See also the PML GM 10 bolt 8½ cover.

• Chevy Astro Van, 1982 to 2005
• Chevy Camaro, 1993 to 2002
• Chevy S10, 1983 to 2004
• Chevy S10 Blazer, 1983 to 2004


• GMC Jimmy, 1984 to 2004
• GMC S15, 1983 to 1994
• GMC Safari Van, 1982 to 2005
• GMC Sonoma, 1991 to 2004
• GMC Typhoon


• Pontiac Firebird, 1993 to 2002


• Some Mazda trucks

Some vehicles have brackets/cables on or near the stock cover. PML does not have any information on modify these to work with our larger cover. Such modifications are the responsiblity of the installation. See our Return Policy.

Configurations vary. Always check your vehicle to verify differential and clearance.

Bolt Information

PML includes mounting bolts with all differential covers. PML provides bolts that are longer than the stock bolts since the flange on PML's cover is much thicker than stock. The bolts with the stock cover will not work.

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.

• 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.
    
  These images show how to measure the bolt length. Click on small image to view larger in a new tab or window.
• 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.
• Metric bolts will have 20 threads per inch. Standard ones will have 18 threads per inch. Since the bolts do not have a full inch of threads, try counting the number in a half an inch and multiply by two.

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. Watch the video for more informations on checking your bolts.

PML Differential Cover Compared to Stock

  
Click on image to view larger.

These images show this PML differential cover compared to the stock cover.

This image compares the depth of both PML GM 7 1/2, 7 5/8 inch rear differential covers and the stock cover. Click on image to view larger in a new tab or window.

Installations

2002 Chevy Blazer

Pat installed this cover on his 2002 Blazer. His stock bolts were 5/16-18x7/8 inch. Our thanks to Pat for the pictures of his installation.

Stock rear differential cover for GM 7.5 inch ring gear on a 2002 Chevy Blazer   GM 7.5 inch ring gear rear differential gears on a 2002 Chevy Blazer   PML differential cover installed on a 2002 Chevy Blazer
Click on an image to view larger in a new tab or window.

1993 GMC Typhoon

Matthias installed this PML cover on his 1993 GMC Typhoon with a GM 7.625 differential. His truck is lowered by 1.4 inches.

Stock Bolt   PML differential cover installed on a 1993 GMC Typhoon   Suspension   1993 GMC Typhoon
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For a larger picture, please click one of the above images. A separate window will open showing a bigger picture. (The larger pictures take a minute to display.)

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

Learn more about finishes and construction of PML parts.