Rear Diff

[derekmorse]

Hey guys, just wondering... What rearend do I most likely have in my truck? I am putting on a mag-hytec cover and doing a fluid change (obviously) and I'm not sure if I have a locker or limited slip rearend. So I don't know if I need the friction modifier or not. Thanks!!

[jro909]

look for g80 in the glovebox

[derekmorse]

ok cool, the g80 is the locker correct? Thanks!

[brims]

Don't think trucks normally have LSDs, either it's locker or open. Unless for some reason you have and LSD, don't add friction modifier.

[rmck490]

G80 is for the Limited Slip rearend

[derekmorse]

Oh, ok I thought the g80 was the locker.. thanks for the correction!

 

thats what I figured, I just wasnt exactly sure. I also just read that the amsoil synthetic rear diff fluids don't need the additive anyways so I would have been ok either way. Thanks for the input!

[Nytemare]

Oh, ok I thought the g80 was the locker.. thanks for the correction!

 

thats what I figured, I just wasnt exactly sure. I also just read that the amsoil synthetic rear diff fluids don't need the additive anyways so I would have been ok either way. Thanks for the input!

Stop confusing him.

 

G80 is the RPO code for a limited slip rear end....period.

G80 in all 99 and newer trucks means it has a locking rear end from Eaton called a mechanical locker...or by some a cookoo clock locker, named so for the way it works emulating the movement of a cookoo clock.

 

Cars and some SUV's with a G80 code have a clutch style LSD.

 

No matter which one you have the RPO code is still G80 and if you dont have an open rear diff than you have a limited slip rear end. Weather it locks or is clutch type of fluidic type or any other type of diff, other than a open or a spool...its referred to as a Limited Slip. That's what the locker or clutches etc does...it limits the slip in the differential.

[derekmorse]

Oh, ok I thought the g80 was the locker.. thanks for the correction!

 

thats what I figured, I just wasnt exactly sure. I also just read that the amsoil synthetic rear diff fluids don't need the additive anyways so I would have been ok either way. Thanks for the input!

Stop confusing him.

 

G80 is the RPO code for a limited slip rear end....period.

G80 in all 99 and newer trucks means it has a locking rear end from Eaton called a mechanical locker...or by some a cookoo clock locker, named so for the way it works emulating the movement of a cookoo clock.

 

Cars and some SUV's with a G80 code have a clutch style LSD.

 

No matter which one you have the RPO code is still G80 and if you dont have an open rear diff than you have a limited slip rear end. Weather it locks or is clutch type of fluidic type or any other type of diff, other than a open or a spool...its referred to as a Limited Slip. That's what the locker or clutches etc does...it limits the slip in the differential.

 

 

Thank you very much, that was an awesome explaination.