Tranny Oil

[lenponz]

I have a 5-Speed close ratio (i beleive) in my 240z.

Q: what is the correct oil to use for it?

the new stuff sold by Nissan is for the more modern trannys (very lite) but can i use it for this older trans?

Any suggestions

[LeonV]

Read the FSM and use the specified weight/class oil. I use Redline.

[240260280z]

Redline MTL worked great in my 280z with 82 5sp transmission.... but not great in my S2000.

Honda manual transmission fluid works great in the Honda and it is inexpensive.

[240ZGL]

My 4 speed has 235,000 miles on it, There is no record of a rebuild and I have every receipt that went into the car from new. I just refilled with 75-90 Purple and the damm thing shifts great and runs quite. Me likeeee this stuff.

[Arne]

I run Redline MT-90 in mine.

[jmortensen]

Really any gear oil works, but I ran SWEPCO 201 mixed with ATF 50/50 for faster shifting.

[d240zx2]

75-90 Royal Purple in mine. Works great hot or cold.

[Walter Moore]

I run Redline MT-90 in mine.

Same here. The Redline made the shifting dramatically smoother.

You need a GL-4 oil, not a GL-5 oil. If you don't want to go synthetic, Pennzoil makes a non-synthetic oil that is supposed to be usable with "yellow metals" which should work. The synchronizers in the transmission are brass, and the sulfur that is in a GL-5 oil will make them brittle.

[Arne]

Last time I was looking, it seemed like non-synthetic GL-4 was tough to find. Fewer and fewer new cars use it anymore. Synthetics were a lot easier, for some reason. Numerous places had that on the shelf.

[Oiluj]

I'll also put in my vote for MT-90. Great drive train lubricant.

[Reverend]

Redline.

[philbar73]

I didn't know synthetic oil was bad for my transmission. I just changed the oil to synthetic. Should i change it again?