[Z06] Trans and differential fluid
Thread Starter
Racer
Joined: Jan 2007
Posts: 341
Likes: 39
From: Connecticut
Trans and differential fluid
Puttting a Monster stage 2 clutch in my Z and while I have everthing out I am going to change the fluid in the rear and trans. Looks like the trans holds 4 quarts but cant seem to find the capacity of the rear.
Can anyone help. Thinking of using Redline D4 for the trans and 75W-90 for the rear with additive for the limited slip. Anyone have any other suggestions?
Can anyone help. Thinking of using Redline D4 for the trans and 75W-90 for the rear with additive for the limited slip. Anyone have any other suggestions?
Safety Car
Joined: Oct 2003
Posts: 3,699
Likes: 16
From: Sun City- Menifee Calif.
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 29
From: Vancouver Washington
Puttting a Monster stage 2 clutch in my Z and while I have everthing out I am going to change the fluid in the rear and trans. Looks like the trans holds 4 quarts but cant seem to find the capacity of the rear.
Can anyone help. Thinking of using Redline D4 for the trans and 75W-90 for the rear with additive for the limited slip. Anyone have any other suggestions?
Can anyone help. Thinking of using Redline D4 for the trans and 75W-90 for the rear with additive for the limited slip. Anyone have any other suggestions?
The Redline 75W-90 does not need any modifier added to it, it's already in there.
The Redline 75W-90 NS does not work well in our differentials.
Thread Starter
Racer
Joined: Jan 2007
Posts: 341
Likes: 39
From: Connecticut
What is 75W-90 NS I looked in the Summitt catalog and saw 75W-90 recommended for limited slip dif. Are there two different 75w90?
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 29
From: Vancouver Washington
The other oil , 75w90 NS Redline, is for non-limited slip transaxles
Le Mans Master
Joined: Dec 2005
Posts: 8,575
Likes: 961
From: Communist Colorado
Dont buy the RP. Youll be changing it in a few thousand miles.... Amsoil Torque Drive is a much better product for the transmission. Amsoil also has rear end lube for our cars. Look up Subdriver on the forum. Hes a good guy with great knowledge about fluids and lubes.
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Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
Tranny... I used about 80% of the below container.
Differential ... I used 1 container, and 75% of the second one if I remember correctly. You don't need the slip lock I'm told. I just put a little in just in case. Make sure to do multiple figure 8's in a parking lot to get the fluid in the clutch packs or you risk getting gear whine.
Differential ... I used 1 container, and 75% of the second one if I remember correctly. You don't need the slip lock I'm told. I just put a little in just in case. Make sure to do multiple figure 8's in a parking lot to get the fluid in the clutch packs or you risk getting gear whine.
Racer
Joined: Sep 2011
Posts: 462
Likes: 56
Anyone ever try this stuff in the rear diff?
http://www.rallysportdirect.com/Motu...rce=GoogleBase
Ive had it in my WRX trans for years and its good stuff.
http://www.rallysportdirect.com/Motu...rce=GoogleBase
Ive had it in my WRX trans for years and its good stuff.
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
Ran RP in the trans and diff for about 6K miles, and it shifted well when up to operating temps, but cold shifting wasn't great. Switched to Amsoil that I got from Subdriver on here...it was noticeably better on cold shifts, and as good or better at operating temps. 
Drifting
Joined: Apr 2008
Posts: 1,464
Likes: 32
From: Ocala FL
Tranny... I used about 80% of the below container.
Differential ... I used 1 container, and 75% of the second one if I remember correctly. You don't need the slip lock I'm told. I just put a little in just in case. Make sure to do multiple figure 8's in a parking lot to get the fluid in the clutch packs or you risk getting gear whine.
Differential ... I used 1 container, and 75% of the second one if I remember correctly. You don't need the slip lock I'm told. I just put a little in just in case. Make sure to do multiple figure 8's in a parking lot to get the fluid in the clutch packs or you risk getting gear whine.
I did not use the Slip Lock however.
Le Mans Master
Joined: Dec 2005
Posts: 8,575
Likes: 961
From: Communist Colorado
It is. I tried GM, then Royal Purple, now Torque Drive. The difference in shifting effort is huge.... especially when the fluid is cold. Also, I used to get a slight grind going into second gear about every 1 in a couple of hundred shifts... hasnt happened since changing to torque Drive.
BTW, I also installed the Monster Level 2 clutch. Its an excellent choice... great street manners and only a slight increase in pedal effort.
BTW, I also installed the Monster Level 2 clutch. Its an excellent choice... great street manners and only a slight increase in pedal effort.
Last edited by 81c3; Apr 20, 2012 at 08:53 AM.
Le Mans Master
Joined: May 2005
Posts: 6,366
Likes: 249
From: Fort Lauderdale, Florida
I use Royal Purple in both my trans and diff also. Many thousands of trouble free driving and absolutely no problems. So tell me, why will I be changing my oils in a few miles? RP products have worked well for me. Maybe if I could buy Amsoil locally in a store I'd try them, but when I decide its time to do a change I'd rather not have to first mail-order oil products. Convince me why I should. BTW, I tried a few different oils in my trans and RP was the smoothest, cold or warm. Also, their diff oil also does not modifier added to it, it's in it already.
Le Mans Master
Joined: Dec 2005
Posts: 8,575
Likes: 961
From: Communist Colorado
I use Royal Purple in both my trans and diff also. Many thousands of trouble free driving and absolutely no problems. So tell me, why will I be changing my oils in a few miles? RP products have worked well for me. Maybe if I could buy Amsoil locally in a store I'd try them, but when I decide its time to do a change I'd rather not have to first mail-order oil products. Convince me why I should. BTW, I tried a few different oils in my trans and RP was the smoothest, cold or warm. Also, their diff oil also does not modifier added to it, it's in it already.
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
I use Royal Purple in both my trans and diff also. Many thousands of trouble free driving and absolutely no problems. So tell me, why will I be changing my oils in a few miles? RP products have worked well for me. Maybe if I could buy Amsoil locally in a store I'd try them, but when I decide its time to do a change I'd rather not have to first mail-order oil products. Convince me why I should. BTW, I tried a few different oils in my trans and RP was the smoothest, cold or warm. Also, their diff oil also does not modifier added to it, it's in it already.
All I can tell you is first, talk with Subdriver here on the forum. He sells the Amsoil products, but will also give you a side by side comparison of statistical information on any fluid you have an interest in. Theres many people on here who have noticed a great improvement when switching to Amsoil. I ran RP for about 10k miles and noticed an increased effort in shifting especially when cold even when the fluid was fairly new. Amsoil cured the problem for me. When warm, its as smooth as silk and I have an MGW short shifter also. Subdriver is a great guy and he had my fluid to me in 3 days. Give it a try and if you dont like it, switch back to the RP is all I can say.
100%. Same expereince with my C5Z... (minus the grind)
Last edited by MTPZ06; Apr 20, 2012 at 11:22 PM.
