What oil in rear diff?
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,332
Likes: 0
What oil in rear diff?
Is there special oil that needs to be put in the rear diff when changing it? Can you only get it from the dealer or are there other places?
Thanks,
Chan
P.S. Part number's and/or brands would be great. :cheers:
Thanks,
Chan
P.S. Part number's and/or brands would be great. :cheers:
Le Mans Master
Joined: Mar 2002
Posts: 5,266
Likes: 1
From: Kennesaw Ga
Re: What oil in rear diff? (whip383)
AMSOIL Series 2000 75w90 Gear lube for me. No need to add the additive, it's in it.
http://www.amsoil.com/products/tgr.html
http://www.amsoil.com/products/tgr.html
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,332
Likes: 0
Re: What oil in rear diff? (tshac)
where can i get amsoil? only through a dealer or are there retailer's around here like parts stores? im doing it tomm so i can t order it, unless i wait till next week. im changing out the tranny fluid an diff. if i go with reg. oil, anybody know the part number from chevy on the slip oil, or can i go aftermarket on that too?
Thanks,
Chan
Thanks,
Chan
Le Mans Master
Joined: Nov 1999
Posts: 7,695
Likes: 51
From: Imperial Beach CA
Re: What oil in rear diff? (whip383)
I get flamed for recommending stock stuff but to risk all the good things in the C5 on Billy Bobs recommendations, not a chance. Darn metal just refuses to grow back. :rolleyes:
Melting Slicks
Joined: Jul 2000
Posts: 2,521
Likes: 3
From: Gilbert, AZ, USA
Re: What oil in rear diff? (whip383)
You can go aftermarket, most auto parts stores will have 75W90 gear oil, and limited slip additive in little tubes. Noone's proven any harm from NOT using factory GM fluids in this case.
Sam
Sam
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Le Mans Master
Joined: Oct 1999
Posts: 8,205
Likes: 40
From: Tucson AZ
Re: What oil in rear diff? (whip383)
I have used both Amsoil 75W-90 and Mobil 1 (with GM additive), and I think both are excellent. GM did extensive research before coming up with their choice, so you can't go wrong with the stock synthetic either. Enjoy! :steering:
Racer
Joined: Feb 2001
Posts: 330
Likes: 0
From: Baja Oregon
Re: What oil in rear diff? (whip383)
where can i get amsoil? only through a dealer or are there retailer's around here like parts stores? im doing it tomm so i can t order it, unless i wait till next week. im changing out the tranny fluid an diff. if i go with reg. oil, anybody know the part number from chevy on the slip oil, or can i go aftermarket on that too?
Thanks,
Chan
Thanks,
Chan
Team Owner
Joined: Feb 2001
Posts: 23,731
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From: Making my carbon footprint as BIG as possible
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude '03-'04-'05-'06
Re: What oil in rear diff? (Touringpro)
I'm surprised RedLine hasn't been mentioned yet.... :confused: I thought that was the good stuff? :confused:
Burning Brakes
Joined: Jan 2002
Posts: 1,147
Likes: 1
From: Geismar LA
Re: What oil in rear diff? (Maineiac)
I'm changing mine out to Redline 75W90. It already has the limited slip additive in it. I emailed Redline and they gave me a list of dealers in my area. Otherwise you have to mail order. I'm changing to Redline because a few forum members say the differential runs quieter with it over stock stuff (I've got a slight noise at cruise), so for the cost of two quarts, I'm gonna give it a try. I'll post my results.
[Modified by BLU PIL, 9:35 PM 1/24/2003]
[Modified by BLU PIL, 9:35 PM 1/24/2003]
Safety Car
Joined: Sep 2001
Posts: 4,596
Likes: 2
From: Atlanta GA
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Re: What oil in rear diff? (whip383)
Amsoil here, very happy with it. Have also used Redline in the past. Be careful with the additive, best to call the tech line of the product you select as some won't mix with GM additive and some don't need it (Redline and Amsoil).
Also, love the color of your car :cheers:
Also, love the color of your car :cheers:
Safety Car
Joined: Sep 2001
Posts: 4,596
Likes: 2
From: Atlanta GA
Re: What oil in rear diff? (vettenuts)
I used the GM additive with the amsoil and had no problems.
Here is info that I found, Its on my "how to" from the link above:
Amsoil and Redline claim that there fluids already have an additive in them. Amsoil says it both ways on there website:
AMSOIL gear oils are formulated with friction modifiers for limited slip differential applications. There is no need to add limited slip or additional additives.
AMSOIL Series 2000 Synthetic Gear Lube provides limited slip performance. Although generally not necessary, original equipment manufacturers' limited slip additives may be used in conjunction with AMSOIL Series 2000 Synthetic Gear Lube.
Redline says:
LIMITED-SLIP COMPATIBILITY Red Line Gear Oils, with the exception of the 75W90NS, already contain friction modifier required for operation in limited-slip differentials. Additional additive is not required.
I have emailed Redline and asked them if it would not hurt to add the GM additive to Redline.
Here is the reply from redline
The 75W90 would be suitable for the limited slip in your Z06 it contains 5% friction modifier, typically what is needed to reduce the chatter from the limited slip when making a slow tight turn. Adding more friction modifier if it isn't needed reduces the lock up of the limited slip and reduces it's effectiveness, so I wouldn't add it unless it is needed due to chatter and then only just what is needed. The friction modifier isn't a lubricant but just an additive to make the fluid slipperier for chatter control. The 75W90 should be suitable right out of the bottle without the need for the additive. Thank you for your interest in Red Line Oil.
Here is info that I found, Its on my "how to" from the link above:
Amsoil and Redline claim that there fluids already have an additive in them. Amsoil says it both ways on there website:
AMSOIL gear oils are formulated with friction modifiers for limited slip differential applications. There is no need to add limited slip or additional additives.
AMSOIL Series 2000 Synthetic Gear Lube provides limited slip performance. Although generally not necessary, original equipment manufacturers' limited slip additives may be used in conjunction with AMSOIL Series 2000 Synthetic Gear Lube.
Redline says:
LIMITED-SLIP COMPATIBILITY Red Line Gear Oils, with the exception of the 75W90NS, already contain friction modifier required for operation in limited-slip differentials. Additional additive is not required.
I have emailed Redline and asked them if it would not hurt to add the GM additive to Redline.
Here is the reply from redline
The 75W90 would be suitable for the limited slip in your Z06 it contains 5% friction modifier, typically what is needed to reduce the chatter from the limited slip when making a slow tight turn. Adding more friction modifier if it isn't needed reduces the lock up of the limited slip and reduces it's effectiveness, so I wouldn't add it unless it is needed due to chatter and then only just what is needed. The friction modifier isn't a lubricant but just an additive to make the fluid slipperier for chatter control. The 75W90 should be suitable right out of the bottle without the need for the additive. Thank you for your interest in Red Line Oil.
