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- - Anyone have any experience with Doug Nash overdrives? (https://67-72chevytrucks.com/vboard/showthread.php?t=619395)

1774btcrew

03-05-2014 09:38 PM

Anyone have any experience with Doug Nash overdrives?

I have just found my second Doug Nash overdrive. One is from an automatic and the other from a SM465. I am having a REALLY hard time finding much information about them. I really need a switch for it but not sure on what is involved and can't find any of the original switches anywhere. Would one from a gear vendor work? Any info would be appreciated. I know they are obsolete but seem relatively basic.

Irish1941

03-05-2014 11:34 PM

Re: Anyone have any experience with Doug Nash overdrives?

Richmond bought Doug Nash but then Motive Gear or US Gear bought out Richmond.
You could try them but don't know if anybody will know about them...
I haven't had a Doug Nash in about 15 yrs so I'm probably not much help. Any older speed shops or bigger trans shops near by? Might be surprised what is on the shelf still.

1774btcrew

03-05-2014 11:39 PM

Re: Anyone have any experience with Doug Nash overdrives?

Quote:

Originally Posted by Irish1941 (Post 6560105)

I had also considered trying the Doug Nash switch from one of the OEM overdrives on a Corvette. It seems they can be found reasonably. I just don't know enough about them.We have Hughes transmissions and So Cal and Lopers Speed Shops so it is possible they may have something. It is weird, your brain gets trained to think a certain way and you get used to looking on the internet for everything and don't think of looking right under your nose! Thanks for your input!

Irish1941

03-05-2014 11:47 PM

Re: Anyone have any experience with Doug Nash overdrives?

Those 4+3 Nash trans are funny things. If you could find a Nash parts manual and compare part number with GM units, pretty sure there would be a few cross over parts.

ol_skool_chevy

03-05-2014 11:57 PM

Re: Anyone have any experience with Doug Nash overdrives?

I have a old 1977 Doug Nash 5 speed put away...I have been saving it for about 25 years for some type of project..someday.
It was in my 67 Chevelle back in 1980

blazer2007

03-06-2014 10:55 AM

Re: Anyone have any experience with Doug Nash overdrives?

I had a Nash 5 speed tranny and I know alot of the internal parts were G.M.

1774btcrew

03-06-2014 04:42 PM

Re: Anyone have any experience with Doug Nash overdrives?

Quote:

Originally Posted by blazer2007 (Post 6560641)

I had a Nash 5 speed tranny and I know alot of the internal parts were G.M.

That makers sense as they did use the overdrives in the early 80s corvettes. I did some looking and it seems I should check locally for parts.

Big Port Jimmy 6

03-06-2014 10:56 PM

Re: Anyone have any experience with Doug Nash overdrives?

Quote:

Originally Posted by ol_skool_chevy (Post 6560145)

I have a old 1977 Doug Nash 5 speed put away...I have been saving it for about 25 years for some type of project..someday.
It was in my 67 Chevelle back in 1980

Let me hold that for just a little while:devil: Jay

KQQL IT

03-07-2014 03:06 AM

Re: Anyone have any experience with Doug Nash overdrives?

Years ago had one in a 1 ton put 200-250k used a two speed switch for a 2ton with a two speed rear axle.
And I want to say the motor is the same as well. 20+ years ago memory though.

PS speedo gear is t400 and would melt occasionally pulling the grapevine 3rd over behind a sm465

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