I've got a '78 280z (4 speed), and I'm afraid that the transmission is on its way out. I was considering replacing it with a 5 speed, but I've heard mixed things on the early and later 5 speeds. What's the difference?

-Ben

Basically, gear ratios.

Are there any differences between the various 5 speeds as far as how they mount into the car and where the shifter sits? I've heard that some require cutting on a 240Z and others don't?

Greg

Are there any differences between the various 5 speeds as far as how they mount into the car and where the shifter sits? I've heard that some require cutting on a 240Z and others don't?

Greg

That's not a difference with the transmission, but with the car. Early 240Zs have a smaller opening in the transmission tunnel than do later Zs.

Thats interesting Arne! Will a '72 240Z be able to adapt to a 5 speed transmission then without cutting or will a special or modified shift lever be required?

Greg

Greg,

The swap will not require any cutting into the '72 and '73 240s. Only the series one cars '70 and early '71 need the opening expanded. I thought it was because the shifter on the tranny sat farther back. The 4 speeds in our cars match the 5 speeds.

Actually, I think all '71s need cutting. But '72 and '73 are fine.

Does anyone on here know how to tell if you have a 5 speed out of a 77-79, 80, or 81? I have one and I'm not sure what year it came out of? Are there any numbers that will help me? Thanx

Bryce

I have a 11/70 build that I fitted with a late 5 speed and then a KA conversion. It had a type-A 5 speed when I acquired the car. The tunnel opening was never modified.

nevermind...

Edited April 14, 201115 yr by ezzzzzzz

5th gear tells the story. Look at Post #2. Use white out to make a couple of marks and turn the input shaft one turn.

Thanx for your help Zed Head, didn't even think about that. Found it was from a 77-79, which is what I was hoping.

Bryce