driveshaft length?

[Disciples Performance]

hey guys when i get my 14 bolt FF into my K5 will i need to shorten my driveshaft and if so how much???

 

[4X4HIGH]

Too many variables to be able to give you an answer. You will need a conversion U-joint though.

 

[K5er4Life]

Too many variables to be able to give you an answer. You will need a conversion U-joint though.

This is true, but I do believe you will end up lengthening your drive shaft. The pinion nose on the 14 bolt is actually a little bit shorter than your 10 bolt (I assuming 10 bolt) This is so because the 14 bolts have a pinion assembly that bolts to the front of the case. A long time ago I took some measurements from my 10 and 14 bolt and the 14 ff turned out to be almost 1 inch shorter from yoke to center of axle tubes.

 

[4X4HIGH]

Actually the 14ff pinion nose is longer than a 10 bolt.

 

[goldwing2000]

When I did my swap (from a 12-bolt), I also rotated the pinion up and I ended up getting about 1.5" removed from the d-shaft.

 

[perp]

I never had a length issue after the swap.

 

[K5er4Life]

As you can see already, far too many variables too predict. BTW my d-shaft needed shortening, but that was because it came out of a long bed pickup.

 

[onlychevy6]

i had a 12 bolt in mine just put in the 14 bolt ff and have not changed a thing. of course i have not put in the 6 degree shims either.

 

[blackblazer717]

i say it depends on a few things
what tranny
what lift
did you move or change the rear spring length or position
hummmmmm

LUKE

 

[Chaddy]

I added an inch to the drive line after the swap

 

[Hossbaby50]

I am pretty sure when I measured the 10 bolt vs 14bff when I did my swap the 14bff pinion was about 1" longer then the 10 bolt.

I didn't have to modify my driveshaft at all when I installed my 14bff. My combo is a stock driveshaft with 700R4/208 slipyoke setup. My tcase is shimmed down a little to help with vibs.

Harley