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Thread: Rear end fluid capacity

  1. #1
    Mikevette is offline Cadillac Owners Fanatic
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    Rear end fluid capacity

    Guys

    Picked up a 12 Sedan V and I want to change out the read diff fluid. Can anybody tell me the capacity or how much Amsol I'll need to purchase? I'll go by GM and get a small bottle of the limited slip additive also.

    Thanks


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  3. #2
    spearfish25 is offline Cadillac Owners Enthusiast
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    Re: Rear end fluid capacity

    You need two quarts. I put in about 1.75 quarts when I changed mine last week. Amsoil said you don't need the additive but people have had mixed experiences. I chose to just add the 70ml of additive to avoid messing with it any further. It's been nice and quiet since I changed it (was quiet before too).

  4. #3
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    Re: Rear end fluid capacity

    1.8 qts. When my friend's shop did mine last week he said the current GM fluid has the limited slip additive already mixed in. Nothing more needed

  5. #4
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    thebigjimsho is offline Cadillac Owners 10000+ Posts
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    Quote Originally Posted by spearfish25 View Post
    You need two quarts. I put in about 1.75 quarts when I changed mine last week. Amsoil said you don't need the additive but people have had mixed experiences. I chose to just add the 70ml of additive to avoid messing with it any further. It's been nice and quiet since I changed it (was quiet before too).
    Who at Amsoil? Amsoil HAS CONFIRMED additive is needed for the V2. Not so for the V1.

    A bottle of additive and about 1.5 quarts of Severe Gear...

  6. #5
    Snotty Boom Body is offline Cadillac Owners Fanatic
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    Quote Originally Posted by thebigjimsho View Post

    who at amsoil? Amsoil has confirmed additive is needed for the v2. Not so for the v1.

    A bottle of additive and about 1.5 quarts of severe gear...
    x2
    .

  7. #6
    spearfish25 is offline Cadillac Owners Enthusiast
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    Quote Originally Posted by thebigjimsho

    Who at Amsoil? Amsoil HAS CONFIRMED additive is needed for the V2. Not so for the V1.

    A bottle of additive and about 1.5 quarts of Severe Gear...
    LOL. I copied it for you already. I do get a slight rub when I first drive in the morning. Might need the whole bottle of modifier.

    Here:
    Alex,

    The Severe Gear line already has added friction modifier. Applications that require more than 4 oz of friction modifier may need additional product added if there is gear chatter.


    Ashley
    AMSOIL Technical Services Representative
    AMSOIL INC- AMSOIL Building
    Superior, WI 54880
    TEL 715.392.7101 EXT 6098 -FAX 715.392.3097
    www.AMSOIL.com

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    thebigjimsho's Avatar
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    Re: Rear end fluid capacity

    http://www.cadillacforums.com/forums...ormulated.html

    ----------

    Although the link doesn't work. Ah well...

  9. #8
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    AC Promotions is offline Cadillac Owners Member
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    Re: Rear end fluid capacity

    Add the GM friction modifier since it is supposed to be present if you have a rear end warranty claim.
    Unfortunately it causes any diff fluid to be more apt to break down since it goes into thermal runaway so
    easily. Change the fluid regularly if you engage in Motorsports.

  10. #9
    Mikevette is offline Cadillac Owners Fanatic
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    Cool Re: Rear end fluid capacity

    That's guys for all your input, I'll add the friction modifier for comfort and cheap insurance.

    thanks again

    Mike P.

  11. #10
    LSUFoolsball is offline Cadillac Owners Member
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    Re: Rear end fluid capacity

    where are the plugs? Pics please

  12. #11
    spearfish25 is offline Cadillac Owners Enthusiast
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    After adding a whole bottle of the GM modifier, I was still getting some rubbing sounds from the diff when I'd turn the first couple times after the car sat. Took it back to the dealer, they swapped the GM fluid back in and all is quiet again.

    Think I just needed more modifier than one bottle?


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