Well, I am actually wrestling with the question of whether to use the heavy SP or Light weight SP myself. If the light weight will give the added/needed additional gear protection even under severre road race conditions, then it would be a better choice. Mainly because it should provide better lubrication to the tight tolerance components, like the bearings, etc.
The US RL website does not have as much info as the AU site, they actually have an application recomendation section.
http://www.redlineoil.com.au/
They only have the earlier version EVO listed GSR 92-96, but they recomend the light weight shock proof even for race conditions. Now I am not sure if that takes into account guys like us who are making around 50% more power than stock?
If I was a drag racer making 400-500+ WHP this would be a much easier decision, Heavy weight without a doubt.

If you notice, for racing they also show the light weight shock proof for the transaxle. Now is that for a stock tranny or some sort of dog box?


The question is what will go first? On a slightly modified car used for street/road racing, it seems that you will suffer from damaged gear teeth long before excessive bearing wear, (if you use standard oils). But the light weight SP may have enough gear nashing protection, flow better, and use less HP, I am just not sure.

RL claims that the heavy weight should flow just like a 75-90, shouldn't that be good enough? I may have to go to one of those oil forums and see if I can get some more advice. Those guys are realy into lubricants! If they can't help, I may just have to flip a coin.
Check this site out, more than you ever really wanted to know about oil

http://theoildrop.server101.com/cgi/ultimatebb.cgi

 

I went out and got the lightweight for me here in Austin. I don't have the power some of you guys have, and I rarely, if ever, launch/drag race the car (a side from the track, Texas street racing laws are a some*****... read go to jail, go to jail, or go to jail... car impounded).

 

Transfer case: 0.58 Quarts Redline Light Shockproof
Transaxle ("transmission"): 2.9 Quarts Penzoil Synchromesh (same as GM)
Rear Differential: 0.58 Quarts Redline 75w90 (straight)

Getting a $4.00 plastic lube pump at Auto Zone per recommendations rather than try to funnel and tube it.

That's what I'm going to do. Lots of reading, probably going to blow up the car.

 

I've been using RL HD shockproof in the transfer case and have been running a mix of lightweight and some superlightweight shockproof in the tranny. It shifts very nice and quick at 8800rpm and it will have the added protection if you're making some serious torque. Otherwise EVO's seem to do well on MT90 in the trans.

-Martin

 

Have you had any transfer case or transmission troubles in your beast?

 

Nope, all good so far. I probably just jinxed myself !!

 

I've been running the RL LW Shockproof in the Transfer case for a while also... no problems. Then again, I don't do the "drag thing" either

Penn. Syncroshift => tranny
RL LW Shockproof => transfer case
RL 75w90 => rear diff.

 

I'm going this route also but not sure whether to use LW or HW for TC. I haven't been to the track. Was planning to head there this weekend to see what times the car would hit. Any opinions? LW or HW.

 

Are you going to a track, or a strip? If your tracking the car LW is fine... I use it for daily driving. If you are going to the drag strip (regularly), I would use HW do to all the horror stories I've heard about the transfer case letting go. I think some others are using HW on daily drivers... I just don't feel I need it for my car. Not to mention, I'm trying to increase my MPG and not decrease it with heavy fluids.

 

I end up buying the LW. Talk to the guy at the transmision shop and he said that LW should be fine. With HW I will loose gas mileage. Thks.

 

After reading several posts on the various articles about our fluids I decided to step outside the box and try something different. So far, much to my pleasure, I have a fluid that works fantastic. The greatest thing is that you can use the same fluid in all of the boxs. The fluid is from AMSOIL. the car shifts like butter and I actually saw some increase in mileage (may be placebo). It is of 75w90 consistancy, is ful synthetic, and does not require any friction modifiers. I did however put some friction modifier in the rear diff just for safe keeping.

 

i'm using stock fluids right now.. i'll be switching to redline when i can..

RL MT90=> tranny
RL LW Shockproof => transfer case
RL 75w90 => rear diff

how much of each should i buy?

3 quarts for the tranny and 1 for the diff and TC?