Maybe I should post this in the transmission section but i'll post it here first and see...

So anyways, i'm currently running a cusco lsd & 1-5th carbon sychros in my gearbox and have been looking for a friction modifier here for a while now. Finally found the Amsoil Slip Lock through my uncle who works at the Amsoil distributor here in Ja. I have only a few questions tho based on what he's telling me.

1. He's saying that I need to buy 3 qrts of Amsoil Severe Gear 75w90 plus the Amsoil Slip Lock. Is that necessary or is he just trying to increase on the sale? (Yes he's my uncle but he's still a sales man at heart lol)

2. Can I use the Amsoil Slip Lock with any other Gear Lube?

3. If I use any other Gear Lube does it have to be specific since I'm running the carbon synchros?

Before you state, yes I spent most of the night looking through HT and google and read all about Torco vs Amsoil vs Redline friction modifiers and went and googled what the heck Centistokes are.

I'm willing to admit that I'm even more confused now than before I started.

I want to drop the gearbox tomorrow to change the clutch so I wouldn't mind changing the oil and adding the friction modifier same time so I can get reduce the chatter so any help would be greatly appreciated.

 

Amsoil slip lock should help to reduce chatter. Just apply to your transmission fluid in increments until chatter is at an acceptable level. As for Amsoil gear lube, I'm not too sure if you could use it with your transmission. Usually gear lubes are more viscous than MTF and may damage your synchros. I'm not 100% sure but that's my take on the matter.

 

Do not use gear oil. You need to use their MTF instead.

Friction modifier is optional. It will quiet the chatter down and slightly change the lock up of the LSD. Not running it will not do any damage.

 

So I should go with this one below then?



I actually want to just quiet it down a tad. I suppose the feeling you get when turning from a stand still will still be there? In terms of slightly changing the lock up of the LSD, is that for better or for worse?

 

Im using the same oil in my stock transmission, it works like butter. Gears are smooth and no noise. i dont know if it'll be okay with your modified LSD though.

 

Yes, that is the correct fluid to use.

 

Redline friction modifier works great to almost eliminate the chatter, I have used it before on the cusco diffs and it works like a charm. Like aqua said the lock up will be different (not as aggressive) and long term use with the carbon synchros is probably an unknown.