Need to make another run to the auto parts store tomorrwow to finish buying everything I need for my engine swap, and Im going to get some tranny fluid and rear end fluid, what kind should I get? Any suggestions? Any particular weight? Thanks.

~T.J.

 

I use only Mobil 1 in the tranny and rear end. Shifts much smoother. Just make sure its synthetic and meets GL-5 requirements.

 

Thanks, anyone else?

~T.J.

 

synthetic. mobil, redline, or purple.

 

Do a search, some good threads on this subject. Some synthetics (like Mobile One) raise hell with the syncros's in the tranny. Something about some Synthetics being TO slippery. As a result, the syncro's wear out pre-maturely. I know as, sadly, been there done that.

Key point, stay away from GL5 if going with standard gear lube as the sulfates in GL5 is the bad guy. Look for GL4.

Synthetics...............the concensis is either Red Line or Royal Purple.

 

What grade?
80-90
75-90

 

it depends. different oils are slippery and others not within the same brand. there was a big post on the mobil one synths and redline synths on impreza.com forum when i had wrx. so its not really just based on brand but also on which type of synth from that brand. which you think you'll need is based on your driving habits. hard shifter, you need a grippier oil for you synchros. don't shift hard but want better gas mileage go with the slippy stuff.

 

I just want something that would work well for average daily driving, but would help when I wanna get on it and go, so I guess Ill try and find something...So what standard should I get? Y'all got me all backwards and ****...I had no idea that there was that much crap out there.

~T.J.

 

http://www.redlineoil.com/products.htm

gear lubricants, mobil only has one but redline will show you what to look for.

 

So like 75-90 for me? This all doesnt make that much sense to me...
~T.J.

 

what's got you? i'm not sure what your baffled on.

 

GM CORVETTE SYNCRO-MESH!!!!!!!!!!

It is the BEST...

 

Well, whats the difference, I mean, why make multiple oils? Why cant one just work for everything?

~T.J.

 

Oh yeah, and anyone know how much Im gonna need for both of them?

~T.J.

 

why make different cars? one would move us where we need to go. same reason. we all use them for different purposes. my car is for sport driving and autox. so i want an oil that is synchro hkepful and screw the bearings and gas mileage. if this is your daily and your not that hard go with regular. the way you're talking i would say the 75w90 or mt90.

 

Thanks, but how much should I buy to fill both the tranny and rear end? I dont have my manual at this house...Someone please let me know...Im going tomorrow after work and Im not gonna be able to come home and check for a response before I go, so I kinda would like to know tonight...Thanks.

~T.J.

PS - I dont wanna sound pushy, so if it sounds that way, its not supposed to.

 

Ok, well I managed to find some old Mazda spec books, and what do you know...The capacities and types recommended are both in there. So, for anyone curious, it says:

Manual transmission:

Lubricant Capacity: 2.0 liters (2.1 US quarts, 1.8 Imp. quarts)
Lubricant Type:
Above 18 degrees C (0 degrees F) - A.P.I. Service GL-4 or GL-5 SAE90
Below 18 degrees C (0 degrees F) - A.P.I. Service GL-4 or GL-5 SAE80W

Automatic Transmission:

Fluid Capacity: 7.5 Liters (7.9 US quarts, 6.6 Imp. quarts)
Fluid Type: M2C33F (Type F)

Rear Axle:

Lubricant Capacity:
Standard Diff: 1.2 liters (1.3 US quarts, 1.1 Imp quarts)
Limited Slip Diff: 1.6 liters (1.7 US quarts, 1.4 Imp quarts)
Lubricant Type:
Standard Diff:
Above 18 degrees C (0 degrees F) - A.P.I. Service GL-5 SAE90
Below 18 degrees C (0 degrees F) - A.P.I. Service GL-5 SAE80W
Limited Slip Diff: A.P.I. Service GL-5 SAE90 (Special Lubricant For Limited Slip Differentials)

 

sorry man. i went to bed so i didn't see this till i was already at work. if you're doing it yourself, make sure and take the fill plug out first so you're not dead in the water if its stuck and you already drained.

 

Good tip, Jeremy. Thanks. I can see how that would suck...lol.

~T.J.

 

mazda says use 85w(GL4)...I finally went with redline and it was 7.95/qt. I t is 75w90 weight. I hope I got the right stuff....it was all redline had anyway. same with the tranny oil. went with redline MTL....Good luck

 

if a gear falls out it was a bad choice, lol.