Easy tips

Do I need limited slip additive?

Do I need limited slip additive?

The MOPAR Limited Slip Additive should be added to the gear lubricant whenever a fluid change is made to an axle equipped with a Limited Slip Differential. 2500/3500 Model axles DO NOT REQUIRE any limited slip oil additive (friction modifiers).

What kind of fluid do you put in a differential?

gear oil
Every front or rear axle is filled with a special oil (also called differential fluid, or gear oil) that takes care of this. The differential fluid lubricates the gears, bearings and other internal parts, and provides cooling to these components as well.

Why do I need a rear differential oil additive?

¨ Improved traction differentiates the vehicle relative to other rear wheel and four-wheel drive vehicles on the market. ¨ Maintenance free; requires no lube additives. ¨ Enhanced towing and off-road performance. ¨ Patented carbon friction disc technology enhances performance and durability while reducing warranty claims.

Which is the best differential gear oil to use?

Here is one of the many How To links we have on the site: Dealer will charge about $200 to do front and rear diff, and transfer case. You can do it for far less, with better materials. I recommend full synthetic lubes, and personally believe Amsoil will give you the best protection.

Can a GMC G80 be used as a truck differential?

Warning-As previously mentioned DO NOT add an Limited Slip Differential additive to a G80 Locking Rear Differential. GM has 2 variations of the G80, one for use in cars and one for use in trucks. Cars use a Limited Slip differential which is designed to engage and slip, it never fully locks up.

What kind of lubricant does GM 4 wheel drive use?

I believe GM requires syn for front and rear axle SAE 75W-90 Synthetic Axle Lubricant, except in the case of the auto 4 wheel drive system which does not require syn and recommends SAE 80W-90 (which seems a bit odd to me but that is out of a 2013 owners manual. I might check the service manual on this.)

¨ Improved traction differentiates the vehicle relative to other rear wheel and four-wheel drive vehicles on the market. ¨ Maintenance free; requires no lube additives. ¨ Enhanced towing and off-road performance. ¨ Patented carbon friction disc technology enhances performance and durability while reducing warranty claims.

What can rear axle additives be used for?

Rear axle additives are designed for use in limited slip differentials which are normally installed in cars. All light duty trucks equipped with RPO G80 make use of a locking differential and the use of additives will delay the engagement of the locking mechanism and may decrease axle life.

Here is one of the many How To links we have on the site: Dealer will charge about $200 to do front and rear diff, and transfer case. You can do it for far less, with better materials. I recommend full synthetic lubes, and personally believe Amsoil will give you the best protection.

Warning-As previously mentioned DO NOT add an Limited Slip Differential additive to a G80 Locking Rear Differential. GM has 2 variations of the G80, one for use in cars and one for use in trucks. Cars use a Limited Slip differential which is designed to engage and slip, it never fully locks up.

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Ruth Doyle