think i should run redline gear oil?

[S14tat]

i dunno this has been bothering me for a while. my first gear syncro is kinda starting to go. should i put that redline transmission oil in there? i've read that it works but hte problem is that it takes up quit a bit of hp. on the dyno on a SE-R it took away as much as 6-10whp. if i do that on a RWD i might lose anywhere from 10-13whp. that would put me down to 220 soemthing at the wheels, and i dont' want that. does anyone have experience with this transmission oil? and what do you guys think about it?

[SloS13]

Redline gear oil can add a significant amount of HP on the dyno. Its been proven. If you got extra cash, i'd try it

[S14tat]

really? but how can a thicker oil that coats the gears and synchro add power? shouldn't such a thick fluid rob power?

[SloS13]

not sure how to answer that. Im not a physicist, or even an astronaut. Im just passing on what i've heard. I remember seeing a site somewhere where somebody changed to redline fluids and dynoed. If I remember correctly, the transmission fluid put down like 3whp or something along those lines

[kettnerc]

I used a standard grade transmission oil (GL-4) for my transmission, then switched to redline mt-90 and noticed a difference. Not so much in seat of the pants dyno, but gears engaged and seemed to "work" better. Everything was smoother... I'll never go back now.

[S14tat]

really? hmmmm i guess i gotta look more into it then. thanks guys.

edit: now that i've looked more into it, it does increase hp. hmmmm anyways for 240's is MTL good or do i have to get MT90?

[Silent Drifter]

Im gonna use B & G fluid from Nissan.

[Nathan]

Kinda on topic...I've heard of people using the shockproof gear oil in their transmission's but it seems to be marketed for differentials. Does anyone know if it's the same stuff?

[XcreatureX]

Bring this back from the dead..anyone use lightwieght shockproof? or should i go with MT90...kinda like the idea of the shockproof...what do you think

Seth

[:: orion ::]

MT90 works quite well in our transmissions...

My .02

- Brian

[XcreatureX]

alright no one ever used the shockproof stuff?

Seth

[S13 Charlie]

I believe there's a guy on zilvia.net that used shockproof (85-140w) or something like that, and he found that it was too heavy a fluid for the transmission. I've heard nothing but good things about MT-90, which is why I have some at home waiting to go in. I guess I should get off my a.ss and change my transmission oil!

[XcreatureX]

alright looks like ill just go withthe MT90 then lol stuf expensive but hey why not :-D

Seth

[sanioll]

i dunno this has been bothering me for a while. my first gear syncro is kinda starting to go. should i put that redline transmission oil in there? i've read that it works but hte problem is that it takes up quit a bit of hp. on the dyno on a SE-R it took away as much as 6-10whp. if i do that on a RWD i might lose anywhere from 10-13whp. that would put me down to 220 soemthing at the wheels, and i dont' want that. does anyone have experience with this transmission oil? and what do you guys think about it?

ha ha hahaha, redline takes away power!!

no it does NOT!! I use Redline MT-90, and transmission feels way better than before. My differential also sleeps in redline mt-90. really good stuff.

here:zerothread?id=95826

[slipnfall]

I'lll second the MT90: gears work great even on cold start mornings. I woldn't use MT90 in the differential tho, if any RedLine, use their 75W90, or 80W90 in higher temp climates. The MT90 is not GL5 cert'd IIRC, which is required for the stock open & viscous diff's. In fact I emailed Redline to ask if I could use my leftover MT90 in my diff, they suggested against it.

FWIW, I have Valvoline's synblend 80W90 in my open diff.

And Re: the price, don't cheap out on something like this. I mean sheesh, it's not like you have to change it every 3000mi, may as well put something worthwhile in it.

My 0.02 as well.-Slip

[sanioll]

damn, i was ===> this <==== close to changing differential fluid today, but i didnt becuase i was tired after work/school.

what to use in differential?? and why not to use redline mt-90??

[slipnfall]

Here's the response I got from RedLine:

"Jamie, Thank you for contacting Red Line Oil, I would not recommend the MT-90 in your differential, a GL-5 is called for the MT-90 is a GL-4 though the correct viscosity. In your differential I would recommend the 75W90, a GL-5 product containing the extreme pressure additives needed for the hypoid gear set. Regards, Dave, Red Line Oil"

[Ajax]

That seems like way too informative a response to be coming from a factory to a non-distributor...I used the shockproof stuff for almost 2 years. Not problems until I moved to Minnesota just before winter. Working night shifts without a garage to keep the car reasonably warm, and this thick fluid makes shifting very difficult. I think I switched over to MT90 last time for this reason.