synchromesh friction modified? - ClubWRX Forum - Subaru Impreza WRX and STi Community and Forums

imjames123 · 01-09-2006, 03:35 PM

Today I went over to the Chevy dealership and bought a quart of GM Synchromesh fluid to fill up my tranny (the oil level was below low.. as in below the letter L from the factory

) well after filling it in the transmission felt alot smoother and every gear now slides into place with no effort at all. pretty much feels like im doing a perfect double cluth every up-downshift

well the question is while i was at Chevy to buy the synchromesh they also had another fluid called "Synchromesh Friction Modified". They claimed it was better but I rejected and just got the regular. After getting home i did a bit of research over at Honda-Tech and everyone there seems to be saying that the Friction Modified version is a whole like better for shifting and just the general health of your transmission. I'm just wondering if its just better for their transmissions because their different lsd's, etc. or is it just a better fluid for all apps such as our cars?

Is anyone here running the friction modified stuff? thanks

bigd · 01-09-2006, 03:52 PM

getting into fluid discussions is a whole hugemongous can of worms. There will be some that say "yes it's great", and equally as many others that say "don't bother". I've never heard of it, but our transmissions are unique in that the tranny and forward diff share the same bath of fluid.

tarbaj · 01-09-2006, 09:29 PM

Keep in mind the Honduh guys use GL-4 fluid. Not the same as the GL-5 you need for the WRX.

BLK/EJ20 · 02-04-2006, 12:37 PM

I am interested in trying the "synchromesh" too. It should be ok for our transmissions because I was told that GM uses Subaru AWD systems on some of their trucks.

WRXSleeper · 02-20-2006, 11:12 AM

Quote:

Originally Posted by tarbaj

Keep in mind the Honduh guys use GL-4 fluid. Not the same as the GL-5 you need for the WRX.

Hondas use 10w-30 or Honda MTL sold at the dealers, which is a 10w-30 with additives.

Quote:

Originally Posted by BLK/EJ20

I am interested in trying the "synchromesh" too. It should be ok for our transmissions because I was told that GM uses Subaru AWD systems on some of their trucks.

Synchromesh is not a GL-5 fluid which the front diff needs. 100% synchromesh would not be a good idea for your differential that shares lubrication with the tranny.

01-09-2006, 03:35 PM	#1 (permalink)
imjames123 Registered User Join Date: Sep 2005 Location: fairfax, VA Posts: 29	synchromesh friction modified? Today I went over to the Chevy dealership and bought a quart of GM Synchromesh fluid to fill up my tranny (the oil level was below low.. as in below the letter L from the factory ) well after filling it in the transmission felt alot smoother and every gear now slides into place with no effort at all. pretty much feels like im doing a perfect double cluth every up-downshift well the question is while i was at Chevy to buy the synchromesh they also had another fluid called "Synchromesh Friction Modified". They claimed it was better but I rejected and just got the regular. After getting home i did a bit of research over at Honda-Tech and everyone there seems to be saying that the Friction Modified version is a whole like better for shifting and just the general health of your transmission. I'm just wondering if its just better for their transmissions because their different lsd's, etc. or is it just a better fluid for all apps such as our cars? Is anyone here running the friction modified stuff? thanks __________________ The unexamined life is not worth living for man. -Socrates

01-09-2006, 03:52 PM	#2 (permalink)
bigd Registered User Join Date: Oct 2004 Location: Denver Posts: 1,687	getting into fluid discussions is a whole hugemongous can of worms. There will be some that say "yes it's great", and equally as many others that say "don't bother". I've never heard of it, but our transmissions are unique in that the tranny and forward diff share the same bath of fluid. __________________ Dave 01 RS

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02-04-2006, 12:37 PM	#4 (permalink)
BLK/EJ20 Registered User Join Date: Feb 2006 Location: Schaumburg,IL Posts: 92	I am interested in trying the "synchromesh" too. It should be ok for our transmissions because I was told that GM uses Subaru AWD systems on some of their trucks.