Rear Diff fluid change... More than 1qt? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jtzako · 09-27-2010, 08:31 PM

If someone used the Mobile 1 LS 75W-90 gear oil for the rear diff on an SS, did you have to put in more than 1qt?

This stuff already includes the necessary friction modifier and I am not sure if I need to get more than 1qt of it or not.

Mr_Draco · 09-27-2010, 09:20 PM

1 quart is more then enough. The way it's designed you won't be able to get a full quart in anyways.

jtzako · 09-29-2010, 07:17 AM

Ok good to know. I got the change done but the thing still makes the odd groaning noises (more noticable in reverse). I did take it to a parking lot and did about 10 tight circles in each direction as well.

ITGuy11 · 09-29-2010, 09:37 AM

It can't hurt to add the GM friction modifier to the Mobil 1. That is what I did, and I have no noises.

klatterblast · 09-29-2010, 09:50 AM

Quote:

Originally Posted by Mr_Draco

1 quart is more then enough. The way it's designed you won't be able to get a full quart in anyways.

well mine took a whole qt. of R.P. and had room for more but thats enough.

Mr_Draco · 09-29-2010, 09:54 AM

Quote:

Originally Posted by jtzako

Ok good to know. I got the change done but the thing still makes the odd groaning noises (more noticable in reverse). I did take it to a parking lot and did about 10 tight circles in each direction as well.

Do figure 8's, not circles. Circles seem to just not work as well as figure 8's do.

jtzako · 10-01-2010, 09:21 AM

Tried figure 8s but did not appear to change anything. Next step I guess is try draining it again and use the friction modifier. Seems odd I should need that if the mobile 1 already includes it but worth a shot I guess.

jtzako · 10-06-2010, 02:14 PM

OK, I drained some of the fluid, added in a full charge of the friction modifier and then topped off the fluid and now I do not seem to have any more of the groaning. It seems that even though the mobile 1 LS fluid has the friction modifier in it, you still should add a tube of it to the mix anyway.

MEDISIN · 10-06-2010, 02:38 PM

I changed mine at 2500 miles using Mobil1 LS 75W-90 plus the GM friction modifier. I read some mixed reviews about using the Mobil1 gear oil by itself. Currently at 3500 miles and haven't heard any noise out of the rear end.

camaro1 · 10-06-2010, 03:09 PM

the total fill capacity is 1.1qt,, so unless you leave it drain all day, even then you probly will have .1qt stuck up by the pinion bearings,, so 1 qt is usually what it takes to fill after a drain.

09-27-2010, 08:31 PM	#1
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	Rear Diff fluid change... More than 1qt? If someone used the Mobile 1 LS 75W-90 gear oil for the rear diff on an SS, did you have to put in more than 1qt? This stuff already includes the necessary friction modifier and I am not sure if I need to get more than 1qt of it or not. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

09-29-2010, 07:17 AM	#3
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	Ok good to know. I got the change done but the thing still makes the odd groaning noises (more noticable in reverse). I did take it to a parking lot and did about 10 tight circles in each direction as well. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

10-01-2010, 09:21 AM	#7
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	Tried figure 8s but did not appear to change anything. Next step I guess is try draining it again and use the friction modifier. Seems odd I should need that if the mobile 1 already includes it but worth a shot I guess. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

10-06-2010, 02:14 PM	#8
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	OK, I drained some of the fluid, added in a full charge of the friction modifier and then topped off the fluid and now I do not seem to have any more of the groaning. It seems that even though the mobile 1 LS fluid has the friction modifier in it, you still should add a tube of it to the mix anyway. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

10-06-2010, 02:38 PM	#9
MEDISIN Drives: 2011 CTS-V Sedan Join Date: May 2009 Location: Chapel Hill, NC Posts: 1,505 View My Garage	I changed mine at 2500 miles using Mobil1 LS 75W-90 plus the GM friction modifier. I read some mixed reviews about using the Mobil1 gear oil by itself. Currently at 3500 miles and haven't heard any noise out of the rear end. __________________ 2012 - Present: 2011 CTS-V Sedan, A6, Airaid, Zmax TB and Tune by R.P.M. = 535 hp/503 lb-ft. 2009 - 2012: 2010 2SS RS IBM M6, MGW Shifter, BMR Trailing Arms/Tunnel Brace, Roto-Fab CAI, VMAX Ported TB, Kooks 6511-Complete (Headers, X-Pipe, Mufflers), dyno tuned by R.P.M. = 415 hp/412 lb-ft. "Not giving a f^k is truly the greatest luxury, and no luxury car gives fewer f^k's than a CTS-V." - Matt Hardigree

09-27-2010, 09:20 PM	#2
Mr_Draco Drives: 2SS/RS Join Date: Sep 2008 Location: Western North Carolina Posts: 7,182	1 quart is more then enough. The way it's designed you won't be able to get a full quart in anyways.

09-29-2010, 09:37 AM	#4
ITGuy11 Burning up tires Drives: 2023 ZL1 Vert Join Date: Jul 2010 Location: Macomb Twp, MI Posts: 717	It can't hurt to add the GM friction modifier to the Mobil 1. That is what I did, and I have no noises.

10-06-2010, 03:09 PM	#10
camaro1 Drives: 550+RWHP 2010 camaro Join Date: Sep 2007 Location: wisconsin Posts: 1,588	the total fill capacity is 1.1qt,, so unless you leave it drain all day, even then you probly will have .1qt stuck up by the pinion bearings,, so 1 qt is usually what it takes to fill after a drain. __________________ 415ci stroker, TVS 2300 Magnacharger, cnc heads, cam, yank ss3200 converter, Kooks long tubes, Bwoody true cold air kit, ZL1 Pump, magnaflow 3" cat-back, lowering springs,BMR control arms and tie rod bars, 3.73 gears, diff mounts, RX can, ADM fuel controller

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