mattstang

How much friction modifier do I need to add after installing a gear set in my 2000 GT ?

89notchback

iTrader: (2)

It usally comes in a small bottle, so just put the whole bottle in then add diff lube.

mattstang

So one of those 4oz bottles right ?

I was thinking about going with Royal Purple Max Gear what do you guys think about that stuff ?

89notchback

iTrader: (2)

I beleve if you go with that kind of diff lube you dont need friction modifier.

mattstang

Yeah I read that on their website but what do you think of that stuff? What lube are you running in your diff ?

White_Snake

iTrader: (7)

royal purple is supposed to be the .
when i change my gears her in a week or so, i was thinking about going "purple".
its just hard to get your hands on.

FlIpMoDe

iTrader: (3)

I just use Vavoline Syntheic and put a bottle of friction modifier.

89notchback

iTrader: (2)

I have Royal Purple in everything in my car. I refuse to put anything else. :biggrin:

StealthGT

iTrader: (2)

I would suggest using Motorcraft Friction Modifier, as Ford has requested this in there limited-slip rearend. The reason for it is to make the clutches work properly, without this you may have your rearend remain locked while turning short corners obviosly cause a chattering from the back of the car. Im sure that using the friction modifier with the Royal purple is fine and would just save your a$$ if the royal purple isn't a replacement of the friction modifier....just my 2 cents

mattstang

Yeah that's what I decided to do Ford synthetis gear oil with Ford friction modifier. Gears are going in later today.