40-45 mph hop/vibration issue

lincolnlocker · Jul 3, 2014

well.. the ***er is to long to put on my buddies hoist so we put it on jackstands and let it spin freely to see if I noticed anything. the drive shaft has a ever so slight out of balance movement in it.. but here is a vid that prolly is an issue but I dont know its the main cause. https://www.youtube.com/watch?v=LooOqqLUIdc&feature=youtu.be

lincolnlocker · Jul 3, 2014

https://www.youtube.com/watch?v=l52krU7ZVYs&feature=youtu.be

lincolnlocker · Jul 3, 2014

also had a rearend howl when I was running it on the stands.

TyCorr · Jul 4, 2014

You think that would cause an issue?

Didnt your first step involve running to a tire shop?

strokefreak · Jul 4, 2014

Subscribed. Same hop and vibe here.

PDT1081 · Jul 4, 2014

You need to mount up a rim with no tire. Put a straight edge next to it and spin the rim. If the rim wobbles, take it off and put the straight edge right next to the hub.

lincolnlocker · Jul 4, 2014

TyCorr said:
You think that would cause an issue?

Didnt your first step involve running to a tire shop?

yep. they are balanced. that would have showed up when balancing too.. the ford house swapped a brand new set of rims and tires off a truck in the lot and the issue was still there...

PDT1081 said:
You need to mount up a rim with no tire. Put a straight edge next to it and spin the rim. If the rim wobbles, take it off and put the straight edge right next to the hub.

I was going to figure out how to do that but ran out of time. I dont have a bare rim so ill just go to the straight edge method.

TyCorr · Jul 4, 2014

lincolnlocker said:
yep. they are balanced. that would have showed up when balancing too.. the ford house swapped a brand new set of rims and tires off a truck in the lot and the issue was still there...

I was going to figure out how to do that but ran out of time. I dont have a bare rim so ill just go to the straight edge method.

That is such bs that you have to do this much frikkin crap to a basically new truck! I talked to the guy down the street and he said his truck is doing something similar too. 2013 cclb 6.7. He is pissed as hell. Said it shakes unless he goes about 65. He said right at 55 it vibrates. So he goes faster.

PDT1081 · Jul 4, 2014

lincolnlocker said:
yep. they are balanced. that would have showed up when balancing too.. the ford house swapped a brand new set of rims and tires off a truck in the lot and the issue was still there...

I was going to figure out how to do that but ran out of time. I dont have a bare rim so ill just go to the straight edge method.

A large carpenter's works good. You can put a C clamp on the part on the floor to keep it upright. You're not going to be really worried about it being square with the ground yet. Just want something so you can watch the rim in relation to the straight edge.

lincolnlocker · Jul 4, 2014

PDT1081 said:
A large carpenter's works good. You can put a C clamp on the part on the floor to keep it upright. You're not going to be really worried about it being square with the ground yet. Just want something so you can watch the rim in relation to the straight edge.

10-4. that should work.

Aaron S · Jul 4, 2014

I read through and haven't seen anyone say anything about the thread on powerstroke.org. The suspension and steering section. (My theory on the Superduty hop and possible fix )Some have been able to get the hop to stop by reinforcing the trucks frame its self.

I built a brace for my eclb truck, but it didn't make much if any difference.

lincolnlocker · Jul 5, 2014

Aaron S said:
I read through and haven't seen anyone say anything about the thread on powerstroke.org. The suspension and steering section. (My theory on the Superduty hop and possible fix )Some have been able to get the hop to stop by reinforcing the trucks frame its self.

I built a brace for my eclb truck, but it didn't make much if any difference.

mind posting the link?

Aaron S · Jul 5, 2014

http://www.powerstroke.org/forum/su...442-my-theory-superduty-hop-possible-fix.html

sootie · Jul 8, 2014

LOL Theory.

neverkickn · Jul 8, 2014

Took a little road trip for some trout fishing on Sunday and it hopped worse than it ever has before at around 70 mph. Wish there was a fix for this.

TyCorr · Jul 8, 2014

neverkickn said:
Took a little road trip for some trout fishing on Sunday and it hopped worse than it ever has before at around 70 mph. Wish there was a fix for this.

Duramax?