14 bolt and a shackle flip, Flex and Driveshaft Questions. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JohnyWard · 08-15-2011, 12:22 PM

So here is the situation:

I have a 14bolt and a DIY4x shackle flip on a 1971 blazer. It has a 6.2 diesel/ NV4500/dodge(ish) np208 and I know I need a new, custom drives shaft.

The TCase has the standard GM flange for a future EBrake and I know I want a CV style shaft. The 14bolt is a 1350 strap yoke.

If I measured everythin correctly, and I plan on doing it at least once more, then I only need about 1.5 inches of shaft play on compression max (ie the drive shaft would be flat and the axle tube contacting the frame) but I have NO IDEA how far down the axle will travel with the flip and stock springs. From what I understand, most rear shafts have 4" total slip in them, this should give me around 7" of droop.

So here are the questions:

Does anyone know how far down the suspension will droop?
What are people reccomendations for driveshaft manufactures?
And likely more Questions to come...

Thanks

Mr. 250r · 08-15-2011, 10:12 PM

I see this place brought up alot tom woods custom driveshafts http://www.4xshaft.com/ i can't personally vouch for it but i do see it quite alot

greguw · 08-16-2011, 10:26 AM

If your doing a shackle flip should not drop , depending on the shackle length think you get 4+ from the flip .
Driveshafts I Like Tom Woods products but Jess from High Angle drivelines is the man .
Every build and every spring is going to be different , not a exact since , you could repak your springs or ad a add-a-leaf to firm it up .
You will have pinion angles to consider ...

1malo68 · 08-19-2011, 04:15 AM

Jess at High Angle can answer all of your questions (530) 877-2875

67_SS396 · 08-20-2011, 01:03 AM

Each rig is different when it comes to droop. I would call Tom Woods before I called Jess, but that's just my opinion. Then again, I build my own drive shafts too.
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08-15-2011, 12:22 PM	#1
JohnyWard Registered User Join Date: Jul 2008 Location: Snohomish County, WA Posts: 16	14 bolt and a shackle flip, Flex and Driveshaft Questions. So here is the situation: I have a 14bolt and a DIY4x shackle flip on a 1971 blazer. It has a 6.2 diesel/ NV4500/dodge(ish) np208 and I know I need a new, custom drives shaft. The TCase has the standard GM flange for a future EBrake and I know I want a CV style shaft. The 14bolt is a 1350 strap yoke. If I measured everythin correctly, and I plan on doing it at least once more, then I only need about 1.5 inches of shaft play on compression max (ie the drive shaft would be flat and the axle tube contacting the frame) but I have NO IDEA how far down the axle will travel with the flip and stock springs. From what I understand, most rear shafts have 4" total slip in them, this should give me around 7" of droop. So here are the questions: Does anyone know how far down the suspension will droop? What are people reccomendations for driveshaft manufactures? And likely more Questions to come... Thanks

08-15-2011, 10:12 PM	#2
Mr. 250r Registered User Join Date: Dec 2010 Location: freeburg, illinois Posts: 885	Re: 14 bolt and a shackle flip, Flex and Driveshaft Questions. I see this place brought up alot tom woods custom driveshafts http://www.4xshaft.com/ i can't personally vouch for it but i do see it quite alot __________________ 1987 Chevy V30 - http://67-72chevytrucks.com/vboard/s...d.php?t=573854 1988 IROC-Z Camaro - 305/T5 T-Top 1989 GMC V35 - Marbolo Express http://67-72chevytrucks.com/vboard/s...d.php?t=596850 1991 V2500 Suburban Silverado - Sold 1991 V2500 Suburban Scottsdale - Big Nasty http://67-72chevytrucks.com/vboard/s...d.php?t=497423 2001 Ram 3500 5.9 H.O NV56 EC DRW - Sold 2003 1500 Silverado 2004 Ram 3500 5.9 H.O NV56 CC DRW - Sold 2005 Silverado 2500HD 6.6/ZF6 CC LWB

08-16-2011, 10:26 AM	#3
greguw Registered User Join Date: Jun 2010 Location: Bucks County , Pa Posts: 223	Re: 14 bolt and a shackle flip, Flex and Driveshaft Questions. If your doing a shackle flip should not drop , depending on the shackle length think you get 4+ from the flip . Driveshafts I Like Tom Woods products but Jess from High Angle drivelines is the man . Every build and every spring is going to be different , not a exact since , you could repak your springs or ad a add-a-leaf to firm it up . You will have pinion angles to consider ...

08-19-2011, 04:15 AM	#4
1malo68 Registered User Join Date: Aug 2010 Location: Lost Wages, NV Posts: 201	Re: 14 bolt and a shackle flip, Flex and Driveshaft Questions. Jess at High Angle can answer all of your questions (530) 877-2875

08-20-2011, 01:03 AM	#5
67_SS396 Registered User Join Date: Mar 2000 Location: Blue Ridge, Tx Posts: 1,172	Re: 14 bolt and a shackle flip, Flex and Driveshaft Questions. Each rig is different when it comes to droop. I would call Tom Woods before I called Jess, but that's just my opinion. Then again, I build my own drive shafts too. Posted via Mobile Device __________________ Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this."



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