trans problems?

2nd gear grind is pretty common on the Z31, as well as most cars in the world, over time. It gets more in/out shifting action than the other gears overall.

3rd gear isn't that common, but if you do a lot of mid speed driving then I guess it would make sense.

A re-man slave cylinder is about $30. I would definitely do that. How many miles on the clutch and flywheel?

What type of synthetic oil are you using? I tried Castrol at one point and noticed that 2nd wanted to grind easier for some reason. (on a rebuilt trans) I drained it and went with Red Line and the difference was enormous.

Is it GL5? I hear we aren't supposed to use that stuff.

I put it some Motul GL5 super fancy shmancy stuff. It made the grinding from 1st-2nd slightly worse.

So I went to the parts store and found some good ol sta-lube GL-4 and a some power punch gear oil and my grinding has disappeared.

i used mobil 70 90. where can i get redline?

http://autozone.com/servlet/UiBroker?Us … e+Cylinder

go to autozone and spend the 15 bucks for a new slave cylinder.. why the fuck would anyone go to the junkyard for a slave cylinder… after that take it to a qualified mechanic, have him install it, and have him bleed the clutch properly.

[quote]TurboZkid wrote:

Originally posted by MrwassmanNA2T

Is it GL5?.
whats gl5?

OR-Zman wrote:

Gear oils have different properties and they are identified by gl4, gl5, etc. Always check the manual to see what oil a part needs. Redline is all I use in my trannies.

Anyone tried Royal Purple in their tranny? Because it's sold at O'Reilly and Napa, and I believe it's also cheaper than Redline.

I have, and the rp is not as good as the redline, which is why redline is all I use.