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ShockProof is meant for differentials and transfer cases, it reduces wear on gears during launching and heavy loads. I would never use it in OEM transmissions, "dog boxes" yes but not OEM.

MTL and MT90 is another story, these are purely tranny oils and they work very well.
 

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Can anyone say how each product affects ability to shift without the "grdblthug" feeling these (MS3) transmissions have?

I've been considering Amsoil like some others here and it's available, but I need two things to be better over stock:

The feel of shifts.
The fact that it takes an act of Congress to shift into 1st when it's really really cold out & the trans. hasn't yet warmed.
 

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Lightweight shockproof is fine. If you live in sub-freezing environments, I would stick with MT90. If not, lightweight shockproof is fine for synchronized transmissions.

E36 BMW M3s and Nissan R32-34 GTRs 'require' ATF and NOT gear oil. Both work fine with even Shockproof HEAVY. For track-only cars, or cars that never see sub 60*F, shockproof heavy is fine and works GREAT under heavy abuse on track. But takes a few miles to warm up and those few miles need to be taken very patiently on the transmission with slow shifts until it's warmed up.

Either LW-SP or MT90 will be fine.


0.02
 

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I currently use royal purple, but was wondering about eneos, my friend owns a shop and they just started distributing them, and he tells me it's better than what I run...

I like in wisconsin so the winters can be harsh, anyone got any advice?
 

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[quote author=DUCK link=topic=67903.msg2924074#msg2924074 date=1234207501]
I currently use royal purple, but was wondering about eneos, my friend owns a shop and they just started distributing them, and he tells me it's better than what I run...

I like in wisconsin so the winters can be harsh, anyone got any advice?
[/quote]For marketers, everything you are running is worse than what they have ;)

I've tried RP Synchromax, its okay. I would probably stick with an equivalent light-weight oil like MT90 or MTL for Wisconsin winters rather than going to a 75W gear oil...
 

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if there are complaints of MT90 being too "thick" in the cold, try out Redline MTL. it runs a bit thinner than MT90, but has the same great protection. when switching through gears, you can feel the gear changes more too. a more mechanical feel.
 
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