[mysticmissle]

im looking at a used trans. Is there away to verify ratios from the serial number on the trans? it is an old one that says doug nash, not richmond.

[mysticmissle]

i guess 5th is alwas 1:1 if it is a nash. Only Richmond introduced the OD

[Tom Vaught]

Since I own a couple of these things, One at my house for the 64 GTO and one at a friend's house for parts, here is the ratios you requested.

The GM street 5-speeds (made by DOUG NASH) came with 3.27, 2.13, 1.57, 1.23 and 1:1 gearing 26 spline input shaft and the good rear yoke (I believe from a Turbo 400 trans). The speedometer gear is on the Chevrolet side of the trans.

Hurst made a decent shifter and Leonard Long made a great shifter.

Gear Ratios were all the same for the NASH STREET TRANS EXCEPT THAT NASH DID OFFER A TRANS TO GM THAT WAS DIFFERENT AND HAD THE GOOFY RATIOS THAT GM WANTED FOR THE CORVETTE. He sold very few of those trans in production vehicles. I believe the trans was also a overdrive trans. Richmond took the failed GM Production Trans and sold some of those transmissions. (Failed on sales, not quality or durability.)

Tom V.

[mysticmissle]

thanls Tom

[Skip Fix]

If it is an original Nash Richmond used to could verify what it was built with. They did my "race" version. Mine came with a Mopar input and output for GM and had 4th and 5th 1:1 since it was a "Stocker" transmission.

It is also easy to pop the cases open and count teeth or find a number and work down a chart what it is. I've got some charts and assembly manual I can copy if you need it.

[Skip Fix]

The Nash had about a 5 digit number stamped on the front/top of the cases.

[Tom Vaught]

Doug Nash was a Skilled Trades Guy before he made his 7+ Million with the Doug Nash Transmission sale. I knew Doug personally and his second wife. He was involved in the very 1st Lightning Truck project I headed. In his later life he retired and owned two large fishing boats down in the Gulf of Mexico.

I mentioned earlier in this thread about his special Chevrolet Trans. Here is a write-up
and picture of that trans.

https://jalopnik.com/the-chevrolet-c...smi-1825119474

There is a nice picture of the trans in the article. The article also has a video and instructions on how to rebuild
the 4+3 trans. Like I said it a earlier post, that trans does not resemble the Nash 5 speed trans at all.

Tom V.

[Bnick166]

I can't speak of verifying ratios via serial # but here's a chart of what was available. The ones marked is what I have.

[Tom Vaught]

VERY GOOD INFO ON ONE SHEET FOR THE CRASH BOX RACE TRANSMISSIONS.

There you go Skip, now you have a very good piece of info for your NASH Race Trans.

Tom V.

Thanks Bnick166

[GTOGEORGE]

Just a little FYI..........Doug Nash had ONE Bad A$$ Bronco funny car back in the day!


GTO George

[GTOGEORGE]

Originally Posted by GTOGEORGE

Just a little FYI..........Doug Nash had ONE Bad A$$ Bronco funny car back in the day!


GTO George

Rumor has it he also ran a 4 speed in it......Doug Nash 4 speed!


GTO George

[Tom Vaught]

Doug ran a Ford Comet with a 4 speed manual trans BEFORE he ran the Bronco built with a auto trans (3 speed). So NHRA has it right in the link attached and the Bronco never saw a Doug Nash 4 speed which came years later.

https://www.nhra.com/news/2015/remembering-doug-nash

So I agree, I would call that a rumor and nothing more.

Doug was involved in a lot of Pontiac Projects with Herb Adams, but he did special work with all three of the OEMs at the time. But enough History and Rumors.

Tom V.

[GTOGEORGE]

That DORF really started to fly after he put the blower on....great racing back then, not like now!


GTO George

[Skip Fix]

Mine is now a 2.80, 2.22, 1.77, 1.33, 1.0. It does not have the "torsion bar'. Years ago the guys at Richmond even sent me a Nash assembly manual. I can tell you to work on one you need a GOOD large snap ring pliers. The stout snap rings will bend a cheap one!