Differential lube
Thread Starter
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
Differential lube
I just got a quote from a local GM dealer for $130 to change the lube
They say the oil is $65 is that right? Anyone got links to cheaper oil and additive?
They say the oil is $65 is that right? Anyone got links to cheaper oil and additive?
Team Owner
Joined: Aug 2005
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
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St. Jude Donor '09 thru '20
The dealer will steal your money. Lift the car, pump the oil and add gear oil in it.
Oil pump ($10)
Differencial additve for limited slip
2 qt of rear axle oil
teflon for differential plug
refer to the owners manual
You will pay max : $35~$50
Get teflon from Joe the Plummer (neighbor)
Oil pump ($10)
Differencial additve for limited slip
2 qt of rear axle oil
teflon for differential plug
refer to the owners manual
You will pay max : $35~$50
Get teflon from Joe the Plummer (neighbor)
Race Director
Joined: Apr 2000
Posts: 15,344
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From: Texas
The dealer will steal your money. Lift the car, pump the oil and add gear oil in it.
Oil pump ($10)
Differencial additve for limited slip
2 qt of rear axle oil
teflon for differential plug
refer to the owners manual
You will pay max : $35~$50
Get teflon from Joe the Plummer (neighbor)
Oil pump ($10)
Differencial additve for limited slip
2 qt of rear axle oil
teflon for differential plug
refer to the owners manual
You will pay max : $35~$50
Get teflon from Joe the Plummer (neighbor)
FWIW, I use Red Line 75W90, it has the limited slip additive included (ie you don't have to add it separately). Total cost for 2qts is ~$20 including tax.
Race Director
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From: WI
Thread Starter
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
Is Mobil1 GEAR OIL SYN 75W90 a good choice? Does anyone know if the additive is built in with it? What is the capacity of a D36?
I guess it does have the additive built in but is 2 qts enough?
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
$10.89 a qt at Advance
I guess it does have the additive built in but is 2 qts enough?
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
$10.89 a qt at Advance
Last edited by Redeasysport; Dec 15, 2008 at 05:40 PM.
Team Owner
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
The stock gear oil is a 80W-90 GL-5 rated fluid and not a synthetic. Add two bottles of the GM Posi additive. Gear should run $4-5 per quart and about $7 for a bottle of the additive.
Get one of the cheap transfer pumps from Harbor Freight and suck the oil out from the fill hole. Clean the pump and use it to put the fresh gear oil in. Takes about 2 quarts. Don't use teflon on the filler plug. The plug is steel and the housing is aluminum. Just use a good anti-seize on the plug threads.
Get one of the cheap transfer pumps from Harbor Freight and suck the oil out from the fill hole. Clean the pump and use it to put the fresh gear oil in. Takes about 2 quarts. Don't use teflon on the filler plug. The plug is steel and the housing is aluminum. Just use a good anti-seize on the plug threads.
Pro
Joined: Dec 2008
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From: Lubbock for now, headed for Oklahoma
I have become a REAL fan of the BG differential additive for posi and limited slip. It is a synthetic replacement for whale oil. The stuff really does make a difference(unlike 95% of additives).
Thread Starter
Le Mans Master
Joined: Dec 2004
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From: Myrtle Beach SC
St. Jude Donor '05-'06
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Instructor
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From: tullahoma tn
Question still stands is this good to use?
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
Race Director
Joined: Jun 2004
Posts: 13,957
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From: WI
Could try some Schaeffer's. http://www.bobistheoilguy.com/gearoiltest.htm
Here's some additive data: http://www.bobistheoilguy.com/images/lucas/lucas.htm
Here's some additive data: http://www.bobistheoilguy.com/images/lucas/lucas.htm
Thread Starter
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
I thought Mobile One was the best stuff to use. Is this question like which head is the best?OK how about this stuff?
http://www.corvetteguys.com/royalpur...-gear-oil.html
Last edited by Redeasysport; Dec 15, 2008 at 11:49 PM.
Thread Starter
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
More confusion
http://forums.corvetteforum.com/c5-g...you-use-2.html
64% in the poll use synth what does that say. Looking at Bob is the oil guy the synth does not flow very well Geeze I would like to get the best. 28% use GM and almost as many use Royal Purple of course those are C5 guys but is there a difference?
http://forums.corvetteforum.com/c5-g...you-use-2.html
64% in the poll use synth what does that say. Looking at Bob is the oil guy the synth does not flow very well Geeze I would like to get the best. 28% use GM and almost as many use Royal Purple of course those are C5 guys but is there a difference?
Thread Starter
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
More info
Richmond Gears says to use Synth in their rebuilds
101 Corvette projects say to use Synth too.
Dam you Bob the oil guy why do I have to look at your stuff. It always makes me paranoid.
Richmond Gears says to use Synth in their rebuilds
101 Corvette projects say to use Synth too.
Dam you Bob the oil guy why do I have to look at your stuff.
It always makes me paranoid.
Le Mans Master
Joined: Feb 1999
Posts: 9,922
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Ask LPE, what do they use?
My Mobil 1 I used the GM additive as it made noises turning left and right. Mine was built by IKERDS all three times ( two broken D36's, and now my D44 with no leaks and AMSOIL)
Mobil Leaked 3 times.
I think TOM PIPER wrote about it a while ago.
Le Mans Master
Joined: Mar 2004
Posts: 8,700
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From: Ft. Lauderdale Fl
Do it yourself. Its a $25.00 job and 20 minutes. I used a pipe wrench to losen the plug. Pumping out the old and pumping in the new, got some in my hair, thats a lousy condictioner.
Last edited by runner140*; Dec 18, 2008 at 07:50 AM.
Le Mans Master
Joined: Apr 2005
Posts: 6,413
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From: The Old Dominion
Question still stands is this good to use?
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
Where have you found this specific warning about running synthetic oil in the diff? What engineers told you this?
Team Owner
Joined: Dec 2000
Posts: 21,094
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From: Phila., PA burbs
I'd like to see this also. While these cars may have came from the factory with conventional gear oil, I don't recall ever seeing anything that said not to use it.