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8 3/4 Mopar to Ford 9 inch swap drives haft length.
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I'm switching a car from a 8 3/4 to 9 inch. Both have 1350 ujoints. Any guess on if the driveshaft will need to be lengthened or shortened? I do not have a motor or trans in the car yet.


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Posts: 255 | Location: Escondido | Registered: July 01, 2011Reply With QuoteReport This Post
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On. Dragster 8 3/4 to 9 inch ford 1 inch longer 4 link car
 
Posts: 34 | Location: rubicn wi. | Registered: December 22, 2013Reply With QuoteReport This Post
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Similar for me, hard tail Dragster, went from 8 3/4 to 9” and my coupler was about 1 inch too short.


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Posts: 313 | Location: Firehouse 10 Wichita Ks | Registered: February 15, 2005Reply With QuoteReport This Post
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Originally posted by NEMO963:
Similar for me, hard tail Dragster, went from 8 3/4 to 9” and my coupler was about 1 inch too short.


How did you account for the pinion location difference?


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Posts: 29 | Location: Newville Pa | Registered: August 12, 2017Reply With QuoteReport This Post
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My guess they welded the plates on to line rear end up in right location on dragsters you work off the pinion
 
Posts: 409 | Location: Natick MA | Registered: November 15, 2017Reply With QuoteReport This Post
DRR Sportsman
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Yes sir. It was an Older N&P car with 8.75 mopar, rear was welded in. Had Holzman race cars cut the 8.75 out, welded plates in the rear and welded up a ford 9” and bolted it in. Only thing we found didn’t line up perfectly was the trans to rear coupler 1” too short. Bought a longer one from MW and was back in business. Broke a number of 8.75 before the switch and after ran the same 9” for many years.


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Posts: 313 | Location: Firehouse 10 Wichita Ks | Registered: February 15, 2005Reply With QuoteReport This Post
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Did you notice any significant difference as to reduced ground clearance with the pinion on the 9 inch being lower in relation to axle vs. the 8 3/4?


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Posts: 29 | Location: Newville Pa | Registered: August 12, 2017Reply With QuoteReport This Post



DRR Sportsman
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I didn’t, but since my old one was welded solid and this one was bolted in we set the ground clearance to be the same and not sure where that would has located it in comparison to the mopar.


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Posts: 313 | Location: Firehouse 10 Wichita Ks | Registered: February 15, 2005Reply With QuoteReport This Post
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