DUSTIN WHIPPLE SAID:"the factory drive shaft speed is very critical and can reach ...
Ford has a TSB on driveline vibration. This pertains to the 139 inch wheelbase trucks X-cabs with short beds. Critcal vibrations (when something is going to break) occurs @ 111 MPH, I ran mine on the dyno to 117MPH and split the tailshaft housing on the tranny. This is also Fords reason for switching to an aluminum drivshaft from a steel one.
Be warned Fords fix for this is repair the part and re-flash the computer to limit the top speed to something like 87 MPH.
One of the Thunderbird owners website has an excellent article on this.You'll have to look for it however its a very good read and worth it.
Be warned Fords fix for this is repair the part and re-flash the computer to limit the top speed to something like 87 MPH.
One of the Thunderbird owners website has an excellent article on this.You'll have to look for it however its a very good read and worth it.
The only safe way to run these trucks (extra cabs and supercrews) @ 100mph + is w/ a 2 piece shaft.I have an 01 supercrew and ended up buying a 2pc steel shaft.

Ford knew to put a 2pc shaft in a supercharged 138.5" wheelbase f150,ex..the harley screw. But since stock f150 arent meant 4 that,they arent built 4 that.

Ford knew to put a 2pc shaft in a supercharged 138.5" wheelbase f150,ex..the harley screw. But since stock f150 arent meant 4 that,they arent built 4 that.
Is that a stock harley piece? Where did you pick it up from, and what did it set you back?
http://www.thrashdriveshaft.com/
Scroll down to f150.You can prolly make a lower bid than what hes askin..
Frank
Originally Posted by madferraristi
The Yokes, fitting and U-joints are all Spicer "1350" series which is the heaviest available for any racecar save, top fuel or funny car. Most of the really high powered door slammers buy their yokes from the likes of Mark Williams who makes them from better material. However, bear in mind that we are talking dropping the hammer on a 500 ci engine at 8000 rpm, a little more severe than a launch from one of our trucks.
There are several 1350 series types available. Comparing a older Dana 1350 yoke to a new Spicer 1350 found in the F-150's is pretty much night and day. 1410 have the same trunion and bearing cap sizes, just bit longer across which I would think is a disadvantage overall. Also, as Mike stated, aftermarket companies use the 1350 series to base their products from...so the 1410 must not be offering much over the 1350.
Originally Posted by justjames80
There are several 1350 series types available. Comparing a older Dana 1350 yoke to a new Spicer 1350 found in the F-150's is pretty much night and day. 1410 have the same trunion and bearing cap sizes, just bit longer across which I would think is a disadvantage overall. Also, as Mike stated, aftermarket companies use the 1350 series to base their products from...so the 1410 must not be offering much over the 1350.


