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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Driveshaft help?!

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Old Jan 10, 2004 | 04:51 PM
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superman71's Avatar
superman71
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From: Lancing, Tennessee
Question Driveshaft help?!

Hey guys i need some help with the driveshaft in my truck. I have a 1971 ford f-100. It had a 351w with a C-4 transmission in it when i got. Whe are now in the process of changing the motor and transmission to a 87 model 351w HO and an 87 model smallcase C-6 transmission. The motor-transmission combo came out of an 87 model E-150 van. My questions are:

1. Will the crossmember have to be moved or altered?
2. Will the driveshaft have to be shortened?
3. Will the front yoke on my driveshaft(C-4) work in the C-6?

If you have an answer to any of the questions above please reply i would really appriciate it.


superman71
 
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Old Jan 11, 2004 | 07:38 PM
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LBell101's Avatar
LBell101
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1. Yes - they are different lengths from front to mount.

2. Yes - the C6 is longer.

3. Hmmm - I think it will work. I know the output splines are the same so I can't see wht they would change the attachment to the DS.

Larry
 
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Old Jan 11, 2004 | 07:43 PM
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moore89
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From: Enid, Ok
You will need a new yoke on the front of the driveshaft. You will need a C6 slip yoke.
 
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