The Inevitable... I believe it's differential time. Advice please!
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2004-2007 Cadillac CTS-V General Discussion Discussion, The Inevitable... I believe it's differential time. Advice please! in Cadillac CTS-V Series Forum - 2004 - 2007; Well it has been whining for the last 25k miles or so, and now I'm at 99,1xx and it's beginning ...
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    WarrenMRogers is offline Cadillac Owners Fanatic
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    The Inevitable... I believe it's differential time. Advice please!

    Well it has been whining for the last 25k miles or so, and now I'm at 99,1xx and it's beginning to make a rubbing noise (?) when I turn tightly. I'm going to go ahead and say I need to fix something.

    From what I've read, I believe I'm due a differential. I am having ZERO luck searching online for options other than a $4,600 creative steel solution which is a) out of my price range and b) unnecessary for my purposes.

    This is my DD and it is mostly stock. I intend to put exhaust and cold air intake on mostly for the sound, and perhaps tune it but that's it. I do not intend to supercharge it or tear into the block (unless it blows up). I may do some minor suspension mods and a short throw shifter--but you get my point, nothing too serious.

    What are my options? I hear all this talk about '07 rears but I can't find anything online. Is there something I'm missing? Where should I look and what should I expect to pay? Is this something I can do myself with intermediary knowledge/skill and basic tools? I have a floor jack and jack stands but no lift.

    Thanks!

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    darkman's Avatar
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    Re: The Inevitable... I believe it's differential time. Advice please!

    First of all, noise during tight corners is the signature of noisy limited slip clutches sticking during separation (to allow the wheels to turn at different speeds). If that is the noise, the remedy is fresh fluid and/or an increase in the amount of additive.

    If in fact you need a new differential I would start by finding out Luke at Lindsay Cadillac's delivered price for the current version (which all any dealer will have.)
    rand49er and rand49er like this.

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    WarrenMRogers is offline Cadillac Owners Fanatic
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    Re: The Inevitable... I believe it's differential time. Advice please!

    Ok, differential fluid eh? I'll give that a whirl. Any advice on brand/type of additive? Excuse my ignorance but I am not hip to differential repair/maintenance.

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    darkman's Avatar
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    Re: The Inevitable... I believe it's differential time. Advice please!

    I would run Amsoil Severe Gear which has the additive already in it. You should get a bottle of their additive anyway because some individual differentials can require more additive to operate quietly.

    The latest GM fluid now has the additive already in it but the cost is high.

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    pato is offline Cadillac Owners Fanatic
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    Re: The Inevitable... I believe it's differential time. Advice please!

    Redline gear oil has additive in it as well.

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    WarrenMRogers is offline Cadillac Owners Fanatic
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    Is this something I can do easily or should I consult a mechanic?

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    Re: The Inevitable... I believe it's differential time. Advice please!

    Quote Originally Posted by WarrenMRogers View Post
    Is this something I can do easily or should I consult a mechanic?
    Very easy. It doesnt say, you may have to adjust your exhaust out of the way. I have magnaflow catback and needed to drop part of it to fully access the fill plug. Make sure you warm your diff up before you change fluid.
    http://www.cadillacfaq.com/faq/answe...ube/index.html

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    Re: The Inevitable... I believe it's differential time. Advice please!

    Quote Originally Posted by silentwig View Post
    Very easy. ...
    Quote Originally Posted by WarrenMRogers View Post
    Is this something I can do easily or should I consult a mechanic?
    It's very easy if you're mechanically minded, but if you've never done this kind of thing or don't have any tools, ramps, or containers to drain the fluid into, just take it somewhere to have it done for you. It won't be very expensive.
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

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    Re: The Inevitable... I believe it's differential time. Advice please!

    I can probably do it based on this youtube video I just watched: http://www.youtube.com/watch?v=rNdHmpQQJJQ I have factory exhaust and it's going to be 62 degrees today so I'm going to give it a shot. Hopefully I can get a decent fluid and the appropriate pumps at NAPA or autozone. He suggests taking the whole cover off and since I am relatively new to the car I think I'll do that to be sure it's completely empty and all. Any tips to keep me from ruining my differential before I get started?

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    pato is offline Cadillac Owners Fanatic
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    Re: The Inevitable... I believe it's differential time. Advice please!

    There is no need to take a cover off, just a drain plug.
    But make sure to loosen the fill plug first so you're not stuck with an empty diff with a fill plug that won't come off.

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    Re: The Inevitable... I believe it's differential time. Advice please!

    ^^^ Yeah that. For goodness sake, DON'T take the cover off.
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

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    Re: The Inevitable... I believe it's differential time. Advice please!

    Loosen up the fill plug before you remove the drain plug.

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    Re: The Inevitable... I believe it's differential time. Advice please!

    Quote Originally Posted by silentwig View Post
    Loosen up the fill plug before you remove the drain plug.
    There is an echo in here.

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    Re: The Inevitable... I believe it's differential time. Advice please!

    Quote Originally Posted by darkman View Post
    There is an echo in here.

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    WarrenMRogers is offline Cadillac Owners Fanatic
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    I didn't get time to do it this weekend because i was busy getting a new job! Way better Hooray. I'll heed this advice and do it this weekend! Thanks so much I'll post with the outcome when in done.

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