GM Synchromesh question

[joat09]

I have a 98' talon 420a with a manual. I'm replacing the tranny fluid, and im not sure how much of the synchromesh I should add. Any help would be great.

 

[BLINKY619]

bg thats what i used on my last eclipse

 

[joat09]

bg thats what i used on my last eclipse

How much did you add though.

 

[BLINKY619]

can remember to be honest.. that was a wile back..>! use the search button you might find something...!

 

[9!'clipseDOHC]

I used BG Syncroshift II for several years and loved it. Just switched to Royal Purple Max Gear synthetic trans fluid. I have never used synchromesh but I have read a lot of mixed reviews.

As far as the amount, its like 2 or 3 quarts. I know on the 4g63 manual transmission you just fill it 'til it overflows.

 

[burkgonzo]

05 Evo MR oem fluid is whats going in my car

 

[joat09]

I used BG Syncroshift II for several years and loved it. Just switched to Royal Purple Max Gear synthetic trans fluid. I have never used synchromesh but I have read a lot of mixed reviews.

As far as the amount, its like 2 or 3 quarts. I know on the 4g63 manual transmission you just fill it 'til it overflows.

Idont believe you are supposed to fill the whole tranny case with synchromesh. 75w-90 gear oil is what is supposed to be used. The synchromesh is less viscous.

 

[freelancefool]

Idont believe you are supposed to fill the whole tranny case with synchromesh. 75w-90 gear oil is what is supposed to be used. The synchromesh is less viscous.

Wrong. You are supposed to use ATF +4 Full Synthetic or the factory NV-T350 lube. 2.1 quarters total.

 

[9!'clipseDOHC]

Idont believe you are supposed to fill the whole tranny case with synchromesh. 75w-90 gear oil is what is supposed to be used. The synchromesh is less viscous.

Oh, I thought you were asking about the capacity. There is no set amount to add. Some people run it straight, others mix it. Personally I would use something else. I had great success running straight BG Syncroshift II.

 

[ToughTalon]

Ive been running straight Gm syncromesh for 3 years now. It has seen many low 12 second passes and a lot of street abuse. No probs for me.

 

[JusMX141]

Wrong. You are supposed to use ATF +4 Full Synthetic or the factory NV-T350 lube. 2.1 quarters total.

ATF has less lubricity than Synchromesh; I'd use the NVT350 lube (if you can find it) as my first choice, Synchromesh as my second.

I've had straight Synchromesh in my '97 GS for three years now, the trans still shifts as smooth as it did the day I put the fluid in. Most of my highway shifting is literally done without using the clutch....no grinding whatsoever.

 

[pboglio]

BG Synchromesh II and GM Synchromesh not recommended by TRE anymore when I talked to Jon, not sure what his website says these days. After a couple quick tranny failures, I've switched to Amsoil Synthetic Transmission Fluid. Hopefully that and the shotpeening will help things out. Shifting is nice, a touch notchy at times but I like it that way.

 

[donniekak]

BG Synchromesh II and GM Synchromesh not recommended by TRE anymore when I talked to Jon, not sure what his website says these days. After a couple quick tranny failures, I've switched to Amsoil Synthetic Transmission Fluid. Hopefully that and the shotpeening will help things out. Shifting is nice, a touch notchy at times but I like it that way.

I've had good luck lately with mobil1 in the trans. The current box is just now starting to rattle, and i'll be swapping it out this week. It has made it almost 10,000 on the 16g and e-85 at max boost.
I don't rely on poor lubrication to increase the coefficient of friction in my trans as a bandaid to better shifting. I use double springs, tight shimming, and new synchros to make a trans shift good.

 

[pboglio]

You need some friction for the synchros to operate properly. With the built tranny's you get alot of gearstack preload, which wears the gears incredibly fast. I made the switch to Amsoil cause I felt there might be some improvement in oil shearing protection and shock protection, along with high temperature protection. Not sure if it will help but we'll see.