I recently got a transmission for pretty cheap. I have a 1978 280z with a 5 speed but I've been getting pieces of bearing with my fluid changes. This guy said it's a 5 speed but doesn't remember if it's out of a late 280z or a zx, any help!?

Looks like a 77-79 5 speed.  Two exhaust hangers, and no access plate on top like the 4 speeds have.  The 79 ZX had the same 5 speed as the Z's.

Should slot right in to where your old one was, no diff changes necessary.

Definitely not from a ZX. Looks like a 79 early 80 5 speed. Speedo cable bolt is at 12:00. You may want to pull the speedo gear to make sure it matches your diff.

 

 

Don's iPhone using Classic Zcar Club mobile

 

Gear ratios are the same, regardless.  That's all that really matters, within the possibilities.

Edit - Just realized that I responded quickly, without a full think-through.  79 and 80 are ZX's.  Anyway, unless it's some weird truck transmission, it should be a direct replacement.

Edited April 30, 20179 yr by Zed Head

It looks like a 280Z wide ratio.

This document should give you enough infoemation about it.

 

How to identify - F5W71B Wide and Close ratio transmission.pdf