diff noise gone
Race Director
Joined: Sep 2000
Posts: 11,132
Likes: 1,905
From: Missouri City, TX
Hey, have you done the cooled differential (GS) according to the service manual? It requires running the car at 'x' rpm in 2nd gear, or something like that, then shut engine off and immediately fill again until fluid comes out. I don't know how much more you can fit, due to cooler volume. Curious about your comments on that. I plan to do it by the book, which requires putting car on ramps in front and stands on rear (I already did that when swapping my '12 catted X-pipe with an '11 non-catted (OEM) one. Thx.
Yes, I have on my 06Z and it wasn't fun per the shop manual. After doing that run procedure and all the banging and clanging of the rear axles, the diff will take a few more ounces. If I ever do a diff fluid change again though more trouble, I will just drive the car down the street a hundred yards and back and then relift the car and top off the diff. JMHO though.
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
I'd do the same with a lift, but the way I have to put the car on the air, would take way too long. However, the better question is how much more can you pour if you shut off engine right away, or if you wait an hour or more. Hmmm. Maybe it's minimal. But I'd definitely top it off one way or another. Manual says to top off right away after shutting engine off. The way I level my car on the air, with ramps in front and jack stands on rear, I'll definitely start it on the air, but without getting inside the car. Hey, does the drivetrain really clunk that bad? It shouldn't hurt anything even if that's the case; otherwise it wouldn't be recommended IMO. Thanks man.
Race Director
Joined: Sep 2000
Posts: 11,132
Likes: 1,905
From: Missouri City, TX
I'd do the same with a lift, but the way I have to put the car on the air, would take way too long. However, the better question is how much more can you pour if you shut off engine right away, or if you wait an hour or more. Hmmm. Maybe it's minimal. But I'd definitely top it off one way or another. Manual says to top off right away after shutting engine off. The way I level my car on the air, with ramps in front and jack stands on rear, I'll definitely start it on the air, but without getting inside the car. Hey, does the drivetrain really clunk that bad? It shouldn't hurt anything even if that's the case; otherwise it wouldn't be recommended IMO. Thanks man.
Instructor
Joined: Aug 2003
Posts: 249
Likes: 1
From: Round Rock TX
I replaced the fluid that the local Chevy Dealer put in a couple of weeks ago (at about $100) with AMSOIL (at a DIY cost of ~$40) and so far, so good! Mine was chattering very severely and I really thought there would be no hope without replacing parts. Too early to tell if this is a long term fix for my 2007, but I'm certainly encouraged.
Thanks, Subdriver for the price break on the product. It was delivered fast and the stuff works like a champ!
Thanks, Subdriver for the price break on the product. It was delivered fast and the stuff works like a champ!
Drifting
Joined: Jul 2011
Posts: 1,821
Likes: 442
From: Boca Raton Florida
I'd do the same with a lift, but the way I have to put the car on the air, would take way too long. However, the better question is how much more can you pour if you shut off engine right away, or if you wait an hour or more. Hmmm. Maybe it's minimal. But I'd definitely top it off one way or another. Manual says to top off right away after shutting engine off. The way I level my car on the air, with ramps in front and jack stands on rear, I'll definitely start it on the air, but without getting inside the car. Hey, does the drivetrain really clunk that bad? It shouldn't hurt anything even if that's the case; otherwise it wouldn't be recommended IMO. Thanks man.
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
. That's probably what happened to Gold72. In fact, 'active handling' might also be the culprit since front wheels don't turn, so I'll switch AH off altogether before engaging 2nd. And 2nd gear at idle is pretty much 10 mph, so no need to give it any gas. Thanks again buddy.
Last edited by JCtx; Jun 14, 2012 at 11:25 PM.
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
I replaced the fluid that the local Chevy Dealer put in a couple of weeks ago (at about $100) with AMSOIL (at a DIY cost of ~$40) and so far, so good! Mine was chattering very severely and I really thought there would be no hope without replacing parts. Too early to tell if this is a long term fix for my 2007, but I'm certainly encouraged.
Thanks, Subdriver for the price break on the product. It was delivered fast and the stuff works like a champ!
Thanks, Subdriver for the price break on the product. It was delivered fast and the stuff works like a champ!
Thanks and my pleasure.
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C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
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