Gear Oil - MK1 SC

[SuperchargedMR2]

After much research I changed my gear oil in my 89 SC today. I used Redline 75w-90NS instead of the MT-90 that most others said to use. The MT-90 is the same weight but several places including a Redline tech told me that the 75w-90NS was the proper choice as it is GL5 rated vs GL4 & the SC transmission says to use a GL5 gear oil. It has the same benefits for easier shifting so I'm looking forward to seeing how it works.

[MR2Jedi]

There are many posts recommending the redline gear oil. everyone seems to be very happy with that brand-in both 1st and 2nd gens.
I'll be interested to hear what you think about it after time.

[SuperchargedMR2]

Originally Posted by MR2Jedi

There are many posts recommending the redline gear oil. everyone seems to be very happy with that brand-in both 1st and 2nd gens.
I'll be interested to hear what you think about it after time.

As I get some time with it I'll update everyone on the results. I just figured that the 75w-90NS would give better gear protection along with syncro benefits that are offered by the MT-90.

As a side note I had no issue getting the drain bolt or fill bolt off. I than filled it from the top bolt after removing the intercooler. Easiest gear oil change ever.

[not12listen]

if you like the Redline gear oil, take a look for Swepco 201 gear oil.

quite honestly, AMAZING stuff!

my subaru had 5th gear grind. i put this stuff in and it was GONE.

my wife had 3rd gear grind in her Mr2. same result - the gear grind is gone.

admittedly, its been quite some time, and that gear grind has come back, but it is not as pronounced as it used to be.

[mr2tim]

Your Supercharged Model came with a E-51 transmission that actually has a small oil pump incorporated into the transmission. This lubrication method is opposed to the C-52 (&50's) which do not. Therefore, this should be considered when choosing GL4's vs 5's??

Also it has a tiny loop of tubing that acts as a oil cooler, which to me is kinda like? Doh why bother?

This viscosity issue is a big factor to for me as a competition participant with a larger oil cooler that replaces the pitiful stock unit.

The real pain for me is that this E-51 has to be drained to pull the half-shafts out as this big ol' bathtub case carries a ton of fluid.

There's allways that tradeoff in racing I guess.

[SuperchargedMR2]

Originally Posted by mr2tim

Your Supercharged Model came with a E-51 transmission that actually has a small oil pump incorporated into the transmission. This lubrication method is opposed to the C-52 (&50's) which do not. Therefore, this should be considered when choosing GL4's vs 5's??

Also it has a tiny loop of tubing that acts as a oil cooler, which to me is kinda like? Doh why bother?

This viscosity issue is a big factor to for me as a competition participant with a larger oil cooler that replaces the pitiful stock unit.

The real pain for me is that this E-51 has to be drained to pull the half-shafts out as this big ol' bathtub case carries a ton of fluid.

There's allways that tradeoff in racing I guess.

I was amazed that my transmission takes 4.5 quarts to fill it up from dry or 4.0 for a drain & refill. My 07 Matrix only holds 2 quarts.