can i use DOT 4 for my brakes? will it harm the o-rings inside the brake master cylinder? also i was thinkin' about changin' my tranny oil, what can i use to replace the regular gear oil for my tranny?

 

Yeah you can use it,just stay away from the silicone stuff...

 

you can use DOT4 if you want it's 100% compatible with our brake system.
in your tranny you need to be 100% sure that you get GL4 NOT GL5, GL5 causes Syncro issues.
Napa is one of the few places that carry the correct GL4 fluid.

 

I went to autozone today and they also sell GL4 gear oil. I can't remember the name of the brand but I have some in my car.

 

It's made by coastal,and no it is not gl4 oil....The coastal stuff is compatible with gl3/gl4/gl5 as a top off fluid only,it is not to used as the primary oil in the transmission...

 

that was mistake #1
that's what they'd like you to think

 

do u have any brand in mind?

 

i have the 300zx front calipers and what do u mean if i want its 100% compatablility with our brake system?

for the GL4 oil what brand do i have to get for my tranny?

 

Not any specific brand,any of the major brands would be fine...

 

I mean that you can use DOT4 with absolutely no problems.
It's only DOT5 that has an issue as it is silicone
That being said there is a DOT5.1 that can be used without a problem.
any brand that ONLY states GL4

 

nice. looks like this weekend i will take care of that if not next weekend. thanks guys.

 

What about using Penzoil Syncromesh?

 

Brake fluid explained.
http://auto.howstuffworks.com/question451.htm

 

I'm using the syncromesh in my 240sx and will in the max next time I work on the tranny. Its good stuff.

~Alex

 

I didn't want to take any chances so I bought some of this. Nissan MTF 75w-85( part num. 999MP-MTF00P)

 

How much $$ ???

 

$9.99 a quart