Anyone have any experience with Doug Nash overdrives? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1774btcrew** · 03-05-2014, 09:38 PM

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

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

Quote:

Originally Posted by Irish1941

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.

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

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

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

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

Quote:

Originally Posted by blazer2007

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

Quote:

Originally Posted by ol_skool_chevy

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

Jay

KQQL IT · 03-07-2014, 03:06 AM

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

03-05-2014, 09:38 PM	#1
1774btcrew Senior Member Join Date: Jun 2009 Location: Phoenix AZ Posts: 4,604	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. __________________ AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck.

03-05-2014, 11:34 PM	#2
Irish1941 Registered User Join Date: Nov 2012 Location: Los Angeles, CA Posts: 450	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.

03-05-2014, 11:47 PM	#4
Irish1941 Registered User Join Date: Nov 2012 Location: Los Angeles, CA Posts: 450	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.

03-05-2014, 11:57 PM	#5
ol_skool_chevy Registered User Join Date: May 2010 Location: Hillsboro, Oregon 97123 Posts: 1,300	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 __________________ Measure with a yard stick Mark with Chalk Cut with a torch Built it yourself, don't count on others to to do it for you or with you. It will never get done

03-06-2014, 10:55 AM	#6
blazer2007 Registered User Join Date: Jan 2007 Location: vernon b.c. Posts: 3,022	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.

03-07-2014, 03:06 AM	#9
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,316	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 __________________ " That didnt make it any newer " " Dont antique the equipment "



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.