driveshaft question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**l79m20** · 04-01-2010, 09:41 AM

I have a 66 1/2ton with a l6/pg short shaft and have replaced original PG with a newer long shaft PG and was wondering if anyone knew what driveshaft would work with this new transmission and fit properly? It has a 2 piece driveshaft and would like to continue using this configuration. Nowbody had answered this on the 66 forum so am trying you guys........AnyBody?...................Kirby

**l79m20** · 04-01-2010, 02:22 PM

Anybody???????????????????????????

**nightmare** · 04-01-2010, 02:42 PM

I don't know if anyone is going to have a correct answer for this (who hasn't done that type of switch). the only thing i can think of doing would be to measure the difference between the old PG short tail and new PG long tail, and have the driveshaft shorted by that amount. otherwise you could try finding the front section of a 2-piece, that would be the correct length, at a junk yard or so.

cdowns · 04-01-2010, 02:46 PM

use the driveshaft you've got just take a tape measure see how long you need it to be and take it to a driveshaft shop to b shortened and balanced

PanelDeland · 04-01-2010, 03:04 PM

cdowns probably gave the best advice but check with the driveshaft shop to see exactly how they want it measured.They can give you better advice on what will be cheapest also.A new shaft (front piece) may be cheaper than shortening and balancing the old one(unlikely but you never know).They may also recommend a quality "carrier bearing".Upgraded u-joints may be another option to look into.I don't like to get dirt in my eye so this is one area I feel is better done once right than over.
I am also safety concious about driveshafts since I saw an endo from a bad front joint.

**El Jay** · 04-01-2010, 04:38 PM

Take both halves of the drive shaft to the shop so that they can be balanced as a "unit."

**l79m20** · 04-02-2010, 12:57 PM

Thanks for all the input will wait to see what I will do , I thought maybe there would be a staight switch with an another driveshaft.........

04-01-2010, 09:41 AM	#1
l79m20 Registered User Join Date: May 2005 Location: Reading, Kansas Posts: 628	driveshaft question I have a 66 1/2ton with a l6/pg short shaft and have replaced original PG with a newer long shaft PG and was wondering if anyone knew what driveshaft would work with this new transmission and fit properly? It has a 2 piece driveshaft and would like to continue using this configuration. Nowbody had answered this on the 66 forum so am trying you guys........AnyBody?...................Kirby

04-01-2010, 02:22 PM	#2
l79m20 Registered User Join Date: May 2005 Location: Reading, Kansas Posts: 628	Re: driveshaft question Anybody???????????????????????????

04-01-2010, 02:46 PM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: driveshaft question use the driveshaft you've got just take a tape measure see how long you need it to be and take it to a driveshaft shop to b shortened and balanced __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

04-01-2010, 03:04 PM	#5
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: driveshaft question cdowns probably gave the best advice but check with the driveshaft shop to see exactly how they want it measured.They can give you better advice on what will be cheapest also.A new shaft (front piece) may be cheaper than shortening and balancing the old one(unlikely but you never know).They may also recommend a quality "carrier bearing".Upgraded u-joints may be another option to look into.I don't like to get dirt in my eye so this is one area I feel is better done once right than over. I am also safety concious about driveshafts since I saw an endo from a bad front joint. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

04-01-2010, 04:38 PM	#6
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: driveshaft question Take both halves of the drive shaft to the shop so that they can be balanced as a "unit." __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck

04-02-2010, 12:57 PM	#7
l79m20 Registered User Join Date: May 2005 Location: Reading, Kansas Posts: 628	Re: driveshaft question Thanks for all the input will wait to see what I will do , I thought maybe there would be a staight switch with an another driveshaft.........

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