Lowering & Driveshaft Length - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72Chebby · 12-30-2014, 06:20 AM

Hi guys, a little help if you can. I did a 3/5 drop on my 72 longbox. Springs and shocks. Do I need to do anything with driveshaft length or panhard bar adjustment. Never adjusted a panhard before so don't know proper procedure. Seems to me driveshaft angle and length would be affected to some degree. U-joints and carrier are all new on the 2 piece driveshafts. Th400 tranny. Thanks.

**PGSigns** · 12-31-2014, 09:47 AM

Drive shaft will be fine. You will need to check the pinion angle once you have it back on the ground. The track bar will need to be adjusted once it is back on the ground to center the rear end back up. You will need to install an adjustable track bar as the stock one is not adjustable. I used the super track bar from Early classics and it worked well.
Jimmy

72Chebby · 01-03-2015, 10:38 AM

Thanks Jimmy. That answers most of it. Any advise on the track bar adjustment procedure?
Terry

64chevmn · 01-05-2015, 03:41 PM

I dropped my rear 6-inches with lowering springs and adjustable trac bar (5-inches in the front) and I had to shorten my driveshaft by 3/4 of an inch to get the slip yoke to fit the way it should.

12-30-2014, 06:20 AM	#1
72Chebby Registered User Join Date: Apr 2008 Location: Crossfield, Alberta Posts: 13	Lowering & Driveshaft Length Hi guys, a little help if you can. I did a 3/5 drop on my 72 longbox. Springs and shocks. Do I need to do anything with driveshaft length or panhard bar adjustment. Never adjusted a panhard before so don't know proper procedure. Seems to me driveshaft angle and length would be affected to some degree. U-joints and carrier are all new on the 2 piece driveshafts. Th400 tranny. Thanks.

12-31-2014, 09:47 AM	#2
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Lowering & Driveshaft Length Drive shaft will be fine. You will need to check the pinion angle once you have it back on the ground. The track bar will need to be adjusted once it is back on the ground to center the rear end back up. You will need to install an adjustable track bar as the stock one is not adjustable. I used the super track bar from Early classics and it worked well. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

01-03-2015, 10:38 AM	#3
72Chebby Registered User Join Date: Apr 2008 Location: Crossfield, Alberta Posts: 13	Re: Lowering & Driveshaft Length Thanks Jimmy. That answers most of it. Any advise on the track bar adjustment procedure? Terry

01-05-2015, 03:41 PM	#4
64chevmn Registered User Join Date: Sep 2013 Location: Annandale, Minnesota Posts: 216	Re: Lowering & Driveshaft Length I dropped my rear 6-inches with lowering springs and adjustable trac bar (5-inches in the front) and I had to shorten my driveshaft by 3/4 of an inch to get the slip yoke to fit the way it should.



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