5 speed/OD conversion for 4wd - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Paul M · 01-04-2006, 04:37 PM

picked up a 69 gmc 4wd with 4 speed manual.was wondering if anyone knows of a 5 speed with overdrive conversion or kit that would work with these trucks. i know of the richmond gears 5 speed forcars,not sure for the trucks with 4wd. i also know of the nv4500 from newer trucks,but thats a bit pricey since ill be just selling truck once its finished. any help would be appreciated..thx paul

ckhd · 01-04-2006, 04:46 PM

Pretty much anything is going to involve an adapter, and probably changing driveshaft lengths. I know there is an adapter for the NV4500 to the NP205 from Advanced Adapters.

I've toyed with the idea of using a newer 5-speed/tcase and using a front axle from a Ford, since it has the pumpkin on the driver's side, but usually I decide I don't want to do that.

Chrome8 · 01-05-2006, 12:39 AM

Quote:

Originally Posted by ckhd

Pretty much anything is going to involve an adapter, and probably changing driveshaft lengths. I know there is an adapter for the NV4500 to the NP205 from Advanced Adapters.

I've toyed with the idea of using a newer 5-speed/tcase and using a front axle from a Ford, since it has the pumpkin on the driver's side, but usually I decide I don't want to do that.

I'm planning on using an 05 auto and the transfer case, I wanted to do the ford front diff thing....why wouldn't you want to do it? are there some complications i'm not thinking of?

ckhd · 01-05-2006, 04:09 PM

Quote:

Originally Posted by Chrome8

I'm planning on using an 05 auto and the transfer case, I wanted to do the ford front diff thing....why wouldn't you want to do it? are there some complications i'm not thinking of?

Primarily, I don't want to get rid of my NP205. Well, and I'd hate to have to tell someone that I had a *cough* Ford axle in my Chevy. Not that I have anything against Fords...

Chevrolet4x4s · 01-29-2006, 10:14 PM

Quote:

Originally Posted by ckhd

Primarily, I don't want to get rid of my NP205. Well, and I'd hate to have to tell someone that I had a *cough* Ford axle in my Chevy. Not that I have anything against Fords...

Put a bowtie decal on the punkin and 85%of the world will never know

shelby987 · 01-04-2006, 04:52 PM

what he said....you will need an adaptor......there is no CHEAP way to do it....it can be done relatively inexpensively....but not completely with parts from a pick and pull.....honestly the cheapest of the cheap ways might be to do a body swap onto a late model as anything else (at least that I have come across) will either involve adaptors and an NV4500 or replacing multiple parts of the drivetrain.....If I am wrong...PLEASE let me know....as I would like to do a similar swap.

An aux. overdrive might be the easiest method....but to cut down on the adaptors you will need a divorced unit like Vtblazer has....and he still have to have a $300 shorty slip yoke fabbed up.

**kwmech** · 01-04-2006, 11:31 PM

Gear Vendor if it is a long bed. No OD in 4x4 though.

1969 GMC · 01-05-2006, 03:14 AM

Quote:

Originally Posted by Paul M

picked up a 69 gmc 4wd with 4 speed manual.was wondering if anyone knows of a 5 speed with overdrive conversion or kit that would work with these trucks. i know of the richmond gears 5 speed forcars,not sure for the trucks with 4wd. i also know of the nv4500 from newer trucks,but thats a bit pricey since ill be just selling truck once its finished. any help would be appreciated..thx paul

whats the point if you're just going to sell it? sounds like throwing money away to me.

67-72williso · 01-05-2006, 06:41 AM

Just use a divorced NP-205 behind any 2WD trans you want.
Later Willis

**Yukon Jack** · 01-06-2006, 10:42 AM

Make sure you know which transfer case you have - it likely has a Rockwell T221 and finding an adapter for it that would work with a 5 speed is probably gonna require a custom adapter - that will be dang expensive.

44th Miss Inf · 01-06-2006, 04:53 PM

The 81 and later manual trans 208 case will bolt directly to an NV4500. This is what I did on my conversion from an SM465

Virgil

01-04-2006, 04:37 PM	#1
Paul M Junior Member Join Date: Jun 2000 Location: Oakridge, Oregon Posts: 138	5 speed/OD conversion for 4wd picked up a 69 gmc 4wd with 4 speed manual.was wondering if anyone knows of a 5 speed with overdrive conversion or kit that would work with these trucks. i know of the richmond gears 5 speed forcars,not sure for the trucks with 4wd. i also know of the nv4500 from newer trucks,but thats a bit pricey since ill be just selling truck once its finished. any help would be appreciated..thx paul

01-04-2006, 04:46 PM	#2
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	Re: 5 speed/OD conversion for 4wd Pretty much anything is going to involve an adapter, and probably changing driveshaft lengths. I know there is an adapter for the NV4500 to the NP205 from Advanced Adapters. I've toyed with the idea of using a newer 5-speed/tcase and using a front axle from a Ford, since it has the pumpkin on the driver's side, but usually I decide I don't want to do that. __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?

01-04-2006, 04:52 PM	#6
shelby987 Registered User Join Date: Mar 2005 Location: Just outside Durham, NC Posts: 894	Re: 5 speed/OD conversion for 4wd what he said....you will need an adaptor......there is no CHEAP way to do it....it can be done relatively inexpensively....but not completely with parts from a pick and pull.....honestly the cheapest of the cheap ways might be to do a body swap onto a late model as anything else (at least that I have come across) will either involve adaptors and an NV4500 or replacing multiple parts of the drivetrain.....If I am wrong...PLEASE let me know....as I would like to do a similar swap. An aux. overdrive might be the easiest method....but to cut down on the adaptors you will need a divorced unit like Vtblazer has....and he still have to have a $300 shorty slip yoke fabbed up. __________________ 1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM!

01-04-2006, 11:31 PM	#7
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,599	Re: 5 speed/OD conversion for 4wd Gear Vendor if it is a long bed. No OD in 4x4 though.

01-05-2006, 06:41 AM	#9
67-72williso Junk/Daily Driver Club Join Date: Feb 2004 Location: Manheim, PA 17545 Posts: 253	Re: 5 speed/OD conversion for 4wd Just use a divorced NP-205 behind any 2WD trans you want. Later Willis __________________ Daily Driver: 1970 C-20 400 sbc,sm-465,Dana 61 one ton SRW rear, 3.07 gears, locker. There are three kinds of people: those who make things happen, those who watch things happen, and those who have no idea what happened!

01-06-2006, 10:42 AM	#10
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Re: 5 speed/OD conversion for 4wd Make sure you know which transfer case you have - it likely has a Rockwell T221 and finding an adapter for it that would work with a 5 speed is probably gonna require a custom adapter - that will be dang expensive. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

01-06-2006, 04:53 PM	#11
44th Miss Inf Registered User Join Date: Sep 2002 Location: Liberty, Mississippi Posts: 672	Re: 5 speed/OD conversion for 4wd The 81 and later manual trans 208 case will bolt directly to an NV4500. This is what I did on my conversion from an SM465 Virgil



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