I'm approaching 20k miles on the frs and I decided to go with a brand that Ive been using for years.
I the transmission I put:
Manual Transmission & Trans axle Gear Lube 75W-90
and in the rear diff I put:
Severe Gear 75 90 all Synthetic stuff.
The rear diff was dirty and needed changing, but the transmission wasn't bad at all.
After observing the way the transmission shifts I must say I never thought I'd be as regretful as I am now with a simple fluid change. When cold, the trans is VERY hard to shift into second and sometimes notchy. Its very irritating, however shifts fine when warmed up.
Knowing this, I'm probably going to change back to factory fluid in the transmission. I was just writing this thread to let others know, if you go with amsoil in your manual transmission, expect hard shifts.
