72 LWB Driveshaft advice needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mac the Yankee · 08-22-2019, 10:15 PM

I'm working on getting my '72 LWB (stock 307 and three-on-the-tree) on the road and want to get your input-

Should I try to find a newer 2 piece shaft at the local pull-a-part or rebuild my stock unit? If it means finding a newer unit, what fits?

Thanks, Bill

(aka, Mac the Yankee)

**special-K** · 08-23-2019, 06:27 AM

Rebuild. The one at pick-n-pull is of unknown condition but we know it's as old as yours.

Mac the Yankee · 08-23-2019, 03:37 PM

Thank you for the response special-K!

And I apologize if I wasn't being clear in the question-

Is there a newer model 2 piece drive shaft that will swap out/bolt in (e.g. 88-98, etc) and be a smart upgrade, or should I just stay with what I have? Happy to keep the stock unit and rebuild, but don't want to spend money 2x if the upgrade is a better choice.

60's kid · 08-24-2019, 03:52 PM

I swapped out the Saginaw 3 speed in my LWB 67 GMC C20 for an SM465 over 30 years ago. I had a longer front of the 2 pc. made to fit the shorter trans. I failed to mark and keep the shaft and yoke I took out. I've still got the 3 speed and a 4 speed I'd like to use but I don't want to cut the shaft I had made. It would be great to hear there's another option for me besides building a new one or digging for an old stock but since you've got it I vote rebuild it. Cheers.

08-22-2019, 10:15 PM	#1
Mac the Yankee Registered User Join Date: Nov 2012 Location: Winder, GA Posts: 274	72 LWB Driveshaft advice needed I'm working on getting my '72 LWB (stock 307 and three-on-the-tree) on the road and want to get your input- Should I try to find a newer 2 piece shaft at the local pull-a-part or rebuild my stock unit? If it means finding a newer unit, what fits? Thanks, Bill (aka, Mac the Yankee)

08-23-2019, 06:27 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: 72 LWB Driveshaft advice needed Rebuild. The one at pick-n-pull is of unknown condition but we know it's as old as yours. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-23-2019, 03:37 PM	#3
Mac the Yankee Registered User Join Date: Nov 2012 Location: Winder, GA Posts: 274	Re: 72 LWB Driveshaft advice needed Thank you for the response special-K! And I apologize if I wasn't being clear in the question- Is there a newer model 2 piece drive shaft that will swap out/bolt in (e.g. 88-98, etc) and be a smart upgrade, or should I just stay with what I have? Happy to keep the stock unit and rebuild, but don't want to spend money 2x if the upgrade is a better choice.

08-24-2019, 03:52 PM	#4
60's kid Registered User Join Date: Apr 2017 Location: S.E. Indiana Posts: 2	Re: 72 LWB Driveshaft advice needed I swapped out the Saginaw 3 speed in my LWB 67 GMC C20 for an SM465 over 30 years ago. I had a longer front of the 2 pc. made to fit the shorter trans. I failed to mark and keep the shaft and yoke I took out. I've still got the 3 speed and a 4 speed I'd like to use but I don't want to cut the shaft I had made. It would be great to hear there's another option for me besides building a new one or digging for an old stock but since you've got it I vote rebuild it. Cheers.



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