Differential oil
Le Mans Master
Joined: Feb 2007
Posts: 8,514
Likes: 235
From: Currently somewhere in IL,IN,KY,TN,MO,AR,MS,AL, or FL
So, did you use the GM LS oil that doesn't need any added friction modifier and seems to work well for everyone who has tried it or did you go with something else?
And how did you "smoke" the rearend? I've not seen anyone do that before. Breaking the 2005 with massive hp enhancement is known but not "smoking" one.
And how did you "smoke" the rearend? I've not seen anyone do that before. Breaking the 2005 with massive hp enhancement is known but not "smoking" one.
Safety Car
Joined: Jan 2011
Posts: 4,959
Likes: 526
Your on your own with that one. My post was in reference to the post someone left suggesting that you should heat the fluid up by cutting figure 8's in a parking lot somewhere. Thats just wrong as you need to get those gears spinning pretty fast to heat that fluid up.
Last edited by windyC6; Apr 19, 2016 at 06:10 PM.
Thread Starter
Advanced
Joined: Apr 2016
Posts: 60
Likes: 3
Term
So, did you use the GM LS oil that doesn't need any added friction modifier and seems to work well for everyone who has tried it or did you go with something else?
And how did you "smoke" the rearend? I've not seen anyone do that before. Breaking the 2005 with massive hp enhancement is known but not "smoking" one.
And how did you "smoke" the rearend? I've not seen anyone do that before. Breaking the 2005 with massive hp enhancement is known but not "smoking" one.
Thread Starter
Advanced
Joined: Apr 2016
Posts: 60
Likes: 3
Important: DO NOT add any limited-slip additive (friction modifier). With this new fluid (Dexron LS Gear Oil 75W-90) it is no longer required to add a friction modifier. If a friction modifier is added, it will cause the fluid to lose some of it's friction reducing properties as well as reducing seal life.
Fill the differential with the new DEXRON® LS gear oil, P/N 88862624 (Canadian P/N 88862625). Refer to the table listed below for lubrication specifications.
Check the fluid level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening. Install the fill plug and washer to the differential. Tighten the differential fill plug to 35 N•m (26 lb ft).
Important: Steps 8-13 are for vehicles equipped with the differential cooling system. For vehicles not equipped with the cooling system, proceed to step 14.
Raise the vehicle so the wheels are about a foot off the floor. Make sure the wheels can spin freely without obstruction from the hoist or any nearby items. Start the vehicle and put the transmission in second gear. Slowly accelerate to 10 mph and hold this speed for one minute. Turn the vehicle off. Raise the vehicle. Check the fluid level in the differential. Add fluid until the recommended level is reached. Lower the vehicle.
Once the differential fluid has been changed, the vehicle must be driven in 8-10 tight figure eight maneuvers to heat the fluid and allow the fluid to be worked into the clutch plates.
Lubrication Specifications Application
2004-2005 XLR (Including Export) and 2005 Corvette (Non Export)
1.72 liters
1.85 quarts
2006-2008 XLR (Including V-Series and Export) and 2006-2008 Corvette (Non Z06)(Non Export)
2.0 liters
2.11 quarts
2005 Corvette Export
1.88 liters
1.99 quarts
2006-2008 Corvette Export (Non Z06)
2.16 liters
2.28 quarts
2006-2008 Corvette Z06
2.75 liters
2.91 quarts
Parts Information:
Description: DEXRON® LS Gear Oil
Part Numbers:
88862624 (US-1 Quart)
88862625 (Canada-1 Liter)
Fill the differential with the new DEXRON® LS gear oil, P/N 88862624 (Canadian P/N 88862625). Refer to the table listed below for lubrication specifications.
Check the fluid level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening. Install the fill plug and washer to the differential. Tighten the differential fill plug to 35 N•m (26 lb ft).
Important: Steps 8-13 are for vehicles equipped with the differential cooling system. For vehicles not equipped with the cooling system, proceed to step 14.
Raise the vehicle so the wheels are about a foot off the floor. Make sure the wheels can spin freely without obstruction from the hoist or any nearby items. Start the vehicle and put the transmission in second gear. Slowly accelerate to 10 mph and hold this speed for one minute. Turn the vehicle off. Raise the vehicle. Check the fluid level in the differential. Add fluid until the recommended level is reached. Lower the vehicle.
Once the differential fluid has been changed, the vehicle must be driven in 8-10 tight figure eight maneuvers to heat the fluid and allow the fluid to be worked into the clutch plates.
Lubrication Specifications Application
2004-2005 XLR (Including Export) and 2005 Corvette (Non Export)
1.72 liters
1.85 quarts
2006-2008 XLR (Including V-Series and Export) and 2006-2008 Corvette (Non Z06)(Non Export)
2.0 liters
2.11 quarts
2005 Corvette Export
1.88 liters
1.99 quarts
2006-2008 Corvette Export (Non Z06)
2.16 liters
2.28 quarts
2006-2008 Corvette Z06
2.75 liters
2.91 quarts
Parts Information:
Description: DEXRON® LS Gear Oil
Part Numbers:
88862624 (US-1 Quart)
88862625 (Canada-1 Liter)
Thread Starter
Advanced
Joined: Apr 2016
Posts: 60
Likes: 3
I changed the differential fluid in my 2005 coupe twice during the time I owned it (4k to 60k miles) with Amsoil 75/90 gear oil. I was experiencing "clunking" when I drove in reverse and turned the car. Once I replaced the fluid, all the noise disappeared.
I just had the oil and differential fluid changed in my 2013 Grand Sport after making the drive back to NJ from FL. The car had no issues but I changed the differential fluid just for the heck of it.
I have to say, the car has been bullet proof!
I just had the oil and differential fluid changed in my 2013 Grand Sport after making the drive back to NJ from FL. The car had no issues but I changed the differential fluid just for the heck of it.
I have to say, the car has been bullet proof!
Team Owner
Joined: Apr 2008
Posts: 31,873
Likes: 2,411
From: Middle TN by way of KY, OH, VA, IL, CA, FL, NY, SC, HI
Mine had limited slip clutch chatter until I replaced the fluid with Mobil LS fluid and it has been great since, now over 93,000 miles. Easy job.
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Cruising
Joined: Jul 2016
Posts: 12
Likes: 2
From: CA
Mobile1 LS
Thanks. I just put 2 quarts of Mobile1 LS $20 in my 07. I bought the little hand pump too $9 which made it easy. No more clanking, drives smooth.
Le Mans Master
Joined: Oct 2012
Posts: 6,391
Likes: 1,454
From: South Dakota
I changed mine out a couple of years ago. It maybe didn't need it, but I went ahead for peace of mind. I used the GM brand. I emptied exactly two quarts, and refilled with two quarts.
