Need some help with the ID of this trans

[73G-nose]

This transmission came as a spare with a race car I've since parted with, and I've hung onto it as I was told it was an actual Datsun close ratio comp box.

 

Before I decide what it's fate will be, I wanted to verify if it is something beyond the garden variety 5 speed.

 

As you can see from the pics it's in need of an overhaul, or perhaps destined only as a spare parts donor. I don't think it's a "dog leg" style, as it seems to be a conventional 5 speed shift pattern.

 

The tooth counts in black are for this trans...the yellow counts are what I could find listed for a standard 5 speed (page 146 of the "how to modify datsun engine and chassis manual).

 

Assuming I counted correctly (three times) it does appear to be different than the standard ratio.

 

I couldn't find any ID numbers on the case that may have helped solve the mystery.

 

–Thanks for your help

[ezzzzzzz]

It appears to be a standard 5 speed. There's no cast ear off the passenger side just ahead of the outout. I'm assuming there is one on the drivers side that we can't see. That would indicate it is a late 70's or early 80's box. Brass syncros would not be found in a comp box to my understanding. My early roadster 5 speed does have the split steel syncros. What it came out of is uncertain. That might explain the gearing differences.

[73G-nose]

Mark,

 

Yes, you're correct. I've since verified it as nothing more than a worn out old standard 5 speed. So much for the previous owners integrity.

 

I never was very informed on the many old Datsun transmission variants, as you can tell.

 

I upgraded to a g-force T5 in my car, and have no plans of reverting back.

 

 

 

Thanks for the help...

[HowlerMonkey]

Weren't the 5 speeds offered in the 280z closer ratio than the ones offered in the 280zx?

 

Maybe that's what the previous owner was thinking.