WTB Driveshaft

fd2blk · Jan 22, 2014

I have a BB 71 Roadrunner with 727 and a 8 3/4 rear and need a driveshaft. looking at the parts interchange it needs to be around 50.6 to 50.8 center to center on the u joints. I can use a 7260 to 7290 U Joint so I am not dead set on a 7290 set up but it does need the 727 yoke or a price that compensates for buying a new one.

Thanks in advance Paul

yesom · Jan 23, 2014

I have 1 but not sure how to measure. Number of splines? and so forth.

yesom · Jan 23, 2014

The 1 I have is 51.5.

fd2blk · Jan 23, 2014

I am interested just not sure what size drive shaft I realy need the interchange manual is really confusing. Let me do a little more research and get back with you do you knwo what car it came out of engine trans rearend?

Thanks

addict4christ · Jan 23, 2014

50.68 length center ujoint to center ujoint.
3.25 diameter.

fd2blk · Jan 23, 2014

addict4christ said:
50.68 length center ujoint to center ujoint. 3.25 diameter.

Just looked it up again and you are exactly correct looks like PN 2996 101 for the 340, 383, 440 and the 426 with the 8 3/4 rear end using the 7290's so 51.5 is about an inch to long. Ugg is this not a common drive shaft?

daredevil · Jan 23, 2014

The one you have might work.its just a hair over 3/4 inch too long.Theres a lot of travel on the slip yoke.If your springs are striff it may not be an issue. Before I bought new i,d check where on the yoke the seal rides if theres an extra 3/4 maybe shorten the yoke that much. That may be a replaced shaft and thats what they measured. If you put it in and can pull the shaft out of the diff yoke into the trans an inch you should be good.

fd2blk · Jan 23, 2014

daredevil said:
The one you have might work.its just a hair over 3/4 inch too long.Theres a lot of travel on the slip yoke.If your springs are striff it may not be an issue. Before I bought new i,d check where on the yoke the seal rides if theres an extra 3/4 maybe shorten the yoke that much. That may be a replaced shaft and thats what they measured. If you put it in and can pull the shaft out of the diff yoke into the trans an inch you should be good.

Would love to do that but I don't have a drive shaft at all.

yesom · Jan 24, 2014

It for a 440 not sure of anything else. I also have a new cast bellhousing,new clutch and pressure plate, alternator, starter, power steering pump, and Hooker super comp headers. Weiand hi-ram tunnel ram w/2 Holley 550's. 1969 440 totally rebuilt not bored over with Weiand aluminum valve covers. Any interest in some or all holler at me. THANKS

JHyatt14 · Jan 25, 2014

Paul, check out ebay item number 301073569420. This should be what you need for your application. I have purchased from this seller before. His name is Craig and his products are good at a very fair price. Hope this helps. -Jim

fd2blk · Jan 25, 2014

JHyatt14 said:
Paul, check out ebay item number 301073569420. This should be what you need for your application. I have purchased from this seller before. His name is Craig and his products are good at a very fair price. Hope this helps. -Jim

Jim
I owe you a beer you just saved me $150 thanks for the hook up

JHyatt14 · Jan 26, 2014

Anytime brother. Glad it worked out.

WTB Driveshaft

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