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Old 05-29-2009, 07:34 PM   #1
stixtasy12
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Default trans and rear diff fluids questions (Amsoil)

I have searched and I am still unsure about a few things. I picked up 5 quarts of the Amsoil severe gear 75w-90, am I able to use this in my trans and rear diff without a problem? I also picked up a quart of the Amsoil synthetic manual synchromesh trans fluid, would that do any good for the trans?
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Old 05-30-2009, 01:56 AM   #2
speedadc
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Go ahead and put it in. I have been running that in my car for a while now, and there is a slightly better feel IMO.

Just a little thing, when pouring in the trans fluid, go slow, it will bubble back up, and if you put too much in the funnel it will go all over the place(lucky for me this did not happen). Oh and if you get a long enough funnel and one that fits into the dip stick hole you do not need to remove your IC.

Go ahead and put it in, nothing wrong with it. At least for me on the last 40K plus miles.
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Old 05-30-2009, 02:37 AM   #3
suub07
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I use Redline 75w-90 NS in the trans, and Redline 75w-90 in the rear diff. It is a much better feel over stock fluid, and the whole shifting to first while moving problem that is fairly common in our 5MT's is not an issue at all.

I know that the 5MT's are fairly picky about which fluids can be used safely, and which cannot (for example Motul 300 and redline are great, while valvoline is terrible in our trans even though they are all a 75w90 viscosity).

Unibombers manifesto has good advice about what to use and what not to. I have heard mixed things about amsoil, but haven't ever used it myself
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Old 05-30-2009, 02:40 AM   #4
XanRules
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Quote:
Originally Posted by suub07 View Post
I use Redline 75w-90 NS in the trans, and Redline 75w-90 in the rear diff. It is a much better feel over stock fluid, and the whole shifting to first while moving problem that is fairly common in our 5MT's is not an issue at all.

I know that the 5MT's are fairly picky about which fluids can be used safely, and which cannot (for example Motul 300 and redline are great, while valvoline is terrible in our trans even though they are all a 75w90 viscosity).

Unibombers manifesto has good advice about what to use and what not to. I have heard mixed things about amsoil, but haven't ever used it myself
NS being non-synthetic?
I was unaware that it was a good idea to use NS in our transmissions, I figured Synthetic was just da bomb diggity all around.
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Old 05-30-2009, 02:52 AM   #5
suub07
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The NS is a synthetic oil. Im not sure what the NS stands for. I just check out Redlines site to confirm before posting.

I was debating using the 75w90 NS, or the Lightweight Shockproof that a lot of people on here run, but the back of the bottle on the shockproof said that it could mean death for syncros... so it was NS FTW.
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Old 05-30-2009, 10:04 AM   #6
viper74656
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Quote:
Originally Posted by XanRules View Post
NS being non-synthetic?
NS = No Slip, meaning it doesn't have friction additives, which means it is good for the synchros. You don't want the NS stuff in the rear diff b/c no synchros back there.
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Old 05-30-2009, 12:11 PM   #7
RonJitsu
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Quote:
Originally Posted by stixtasy12 View Post
I have searched and I am still unsure about a few things. I picked up 5 quarts of the Amsoil severe gear 75w-90, am I able to use this in my trans and rear diff without a problem? I also picked up a quart of the Amsoil synthetic manual synchromesh trans fluid, would that do any good for the trans?
Yes you can run that in your trans and read diff without a problem.

The manual synchromesh fluid though is not needed for anything.
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