Diff Fluids??

abhattan · 04-12-2007, 12:49 AM

Hey, I need some help on what kind of Diff Fluid I should use. I have LSD and it's a 5 speed. What is GL-4, -5? Can I use Royal Purple Synthetic? What about for my tranny?

BC_GTE · 04-12-2007, 01:03 AM

Quote:

Originally Posted by abhattan

Hey, I need some help on what kind of Diff Fluid I should use. I have LSD and it's a 5 speed. What is GL-4, -5? Can I use Royal Purple Synthetic? What about for my tranny?

Correct me if im wrong, GL-4 is 75w-90, GL-5 is 80w-90, Royal Purple is great and your tranny likes it too

IHateHacks · 04-12-2007, 01:26 AM

GL-4 and GL-5 are grades of oil 80w-90, 90w are weights/viscositys.

I used 80w-90 GL-5 in my R154 manual trans. That is what the TSRM calls for.

I also used 80w-90 GL-5 in my LSD. TSRM calls for straight 90w GL-5, but lots of luck to you finding that at your local parts store. I know for a fact Redline sells straight 90w fluid but I was too lazy to order it and wait.

Do NOT forget to use LSD additive in your differential. You can get that at any parts store. It comes in little 10oz tubes. Drain the diff, squirt the LSD additive in first, then fill it up with oil.

Royal purple is an excellant choice for oil.

mrnickleye · 04-12-2007, 05:22 AM

I've been using Amsoil racing gear oil in mine for about 4 yrs with no problems. I go ahead and change it every 30k miles, even though they claim 100k miles intervals.

Your only talking about 1 1/2 qts, so it not much $$.

04-12-2007, 12:49 AM	#1
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	Diff Fluids?? Hey, I need some help on what kind of Diff Fluid I should use. I have LSD and it's a 5 speed. What is GL-4, -5? Can I use Royal Purple Synthetic? What about for my tranny?

04-12-2007, 05:22 AM	#4
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	I've been using Amsoil racing gear oil in mine for about 4 yrs with no problems. I go ahead and change it every 30k miles, even though they claim 100k miles intervals. Your only talking about 1 1/2 qts, so it not much $$. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Non Turbo diff vs Turbo diff.	abhattan	MKIII Supra	0	04-18-2007 11:20 PM
Help..Diff Cont Indicator On (off) / No Speedo	Malachiman	MKIV Supra	8	03-13-2007 09:25 PM
Rear Diff?	supraman121	MKIII Supra	4	11-19-2006 06:47 AM
open end diff. sucks!!	88Supraboy	MKIII Supra	2	11-09-2005 08:16 AM

04-12-2007, 01:26 AM	#3
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	GL-4 and GL-5 are grades of oil 80w-90, 90w are weights/viscositys. I used 80w-90 GL-5 in my R154 manual trans. That is what the TSRM calls for. I also used 80w-90 GL-5 in my LSD. TSRM calls for straight 90w GL-5, but lots of luck to you finding that at your local parts store. I know for a fact Redline sells straight 90w fluid but I was too lazy to order it and wait. Do NOT forget to use LSD additive in your differential. You can get that at any parts store. It comes in little 10oz tubes. Drain the diff, squirt the LSD additive in first, then fill it up with oil. Royal purple is an excellant choice for oil.