The GM manaul says a manual trans lube but doesn't give any specs on it. Does anyone know the weight of oil or even the specific type? I am changing all fluids over to Royal Purple buy not sure about what to use. Any info would be greatly appreciated.

 

75 90 or synchromax will work fine.

 

Do a search on here. Its a Saturn manual gear lube.....thats the OEM application.

 

I used lucas

 

It is basically gear oil. I have been running luca 75w90 weight without any issues.

 

royal purple gear max 75-90

 

Ok as long as its a 75-90. Col I can def. deal w/ that.

 

the factory stuff is Silkolene 75w90 GL4/5 go to the bike shops if you want it they carry that sort of lubricant it is very good.

 

It has to be a GL-4 or equivalent. Stick with either the Saturn fluid or better would be the Royal Purple Max Gear 75-90. I have the R.P. and the gears feel alot smoother now.

 

i use mobil 75/90 and it is alot smoother.

i think the RP is same rating GL-5

if u want to keep the warranty stick with the dealership's GL-4 rated stuff

 

The Royal Purple has GL-4 and GL-5 equivalent written on the bottle

 

yea it is GL-5 rated then if i remember correctly the multi GLs mean that GL-5 will be good for GL-4

GL-4 isnt good for GL-5 though

Mobil 1 does the same. Im not 100% however.

 

just to be ornery i generally use in racing for most cars that need it,l a GL6 spec 75w90 gear oil i get in bulk from mobilexxon its an obsolete military spec fluid with lots of extreme pressure additive, but for the M35 OEM Silkolene is what i use..

 

At how many miles are you guys doing this?

 

Like hardly ever; i now have 30 k miles and done one trans oil change when i added a hi helix quaife lsd ....the next change will prolly be when i change the trans again to put in a 4.45 diff ratio, but not right away...unless the gear box breaks which it has not shown any signs of doing...

 

30,000

 

nice doors do they work well no leaks squeaks, and are they heavy? thanks

 

Royal Purple FTW

shifting gears is smooth like butta

 

I already have royal purple in the engine and I wanted all synthetic throughout the car.

Did the quaife lsd get rid of the darting like the stock lsd has?

 

stock and mine same brand: quaife. No the hi helix it does not.If anything it makes it worse, If you have lowered the car, it helps to raise the rack to reduce bump steer- thats the action of the wheels toe-ing in and out as the wheels go up and down as a result of lowering the car below of its OEM ride height. Torque steer is what you are describing, and fwd cars tend to do that...e z on the gas pedal takes care of it , other than what I described to make sure the tie rods are parallel at ride height etc....good luck..

 

The stock LSD is a quaife.

 

amsoil 75-90 transaxle gearlube...just make sure whatever u buy meets gl-4 requirements

 

no squeaking since i greased the fittings. When i originally installed them they did though. Just use a grease gun and all is well.

Also i switched out my 650s for 750s shocks (dont get 850s that was a bad experiment) so now my wife can lift and close them and she is like 5'3 95 lbs.

After the b.s. i put myself through to make them right, they are worth it. Just make sure you have them done professionally or have a grinder when you do them yourself. I actually like them better than stock now.