ome lift now have vibration (didnt before)

[BlueCruiser84]

Finally! Good job sticking with it. The rig looks great. Remember to check the torque on those u-bolts after the shims have been in there for a couple hundred miles.

Brian

 

[orangefj45]

I usually re-torque u-bolts after one day, one week and then one month. And after every wheeling trip.
Check your drive shaft bolts again as well.

Georg @ Valley Hybrids

 

[BlueCruiser84]

I usually re-torque u-bolts after one day, one week and then one month. And after every wheeling trip.
Check your drive shaft bolts again as well.

Georg @ Valley Hybrids

Better safe than sorry, eh?

 

[driveshafterw]

driveshaft

instead of trying to run your truck through a wall take a dial indicator with a magnetic base and see how far the runout is if the shaft is more than 5 thousants then u need to have it straightend ballancing only counteracts the weight tyhe ujoint still works harder one way and not the other dcreating an egg shape type sinerio when the drvline is true the ujoints move equaly upon rotation whitch makes your critical speed rise if the middle ov the driveshaft is more than 5 thousands you get a jump rope efect (sorry spelling not so good droped out of school started building dlines at 16 42 now) dont over tighten ubolts once should be enough use lock tight if u over tighten youl egg shape caps

 

[orangefj45]

dont over tighten ubolts once should be enough use lock tight if u over tighten youl egg shape caps

Uhmmmmm ....... You're a drive line expert, according to yourself. Correct?!

Cruisers don't use u-joint straps .......

We're talking about u-bolts. Not driveline bolts. And yes, u-bolts do stretch and need to be re-torqued.

And if you have something to tell me, then don't send me goofy emails. You're more than welcome to post it on here.

Georg @ Valley Hybrids

 

[driveshafterw]

driveshaft

i dont tyhink i said strapsd all toys have flanges unless there modified idont know i do know after 20 yrs you dont over tighten ubolts period i build dlines period and i would like to talk to you im alwase looking for supplyers

 

[orangefj45]

i dont tyhink i said strapsd all toys have flanges unless there modified idont know i do know after 20 yrs you dont over tighten ubolts period i build dlines period and i would like to talk to you im alwase looking for supplyers

You mentioned "egg shape caps" which would refer to a u-joint.

There's a difference between torquing and re-torquing mechanical fasteners versus "over tightening" them. U-bolts are designed to stretch. And they will. But that doesn't mean you shouldn't check or re-tighten them when need be.
I have some pics of a rig we had here at the shop a couple of years ago. The owner didn't think it was necessary to re-torque his unbolts either. Well, his destroyed spring perches, u-bolts and plates taught him otherwise.

But what do I know ....... I only work on cruisers everyday. ;p

Georg @ Valley Hybrids

 

[cruiserbrandon]

i dont tyhink i said strapsd all toys have flanges unless there modified idont know i do know after 20 yrs you dont over tighten ubolts period i build dlines period and i would like to talk to you im alwase looking for supplyers

Its **** near impossible to overtighten ubolts, their not torque to yield like head bolts so you dont "stretch" them on purpose. They just stretch from age, you could torque ubolts and back it out and your torque setting will be moot.

as long as your breaker bar isnt over 5 feet or your impact is less than 1000 ft/lb rated you should be fine on whatever you can get them too.

Also driveshafterw can you please proof read what you post before you post it, kinda makes it hard to read when 1/3 of it was short hand that I feel like only you may understand.

 

[driveshafterw]

driveshaft

Its **** near impossible to overtighten ubolts, their not torque to yield like head bolts so you dont "stretch" them on purpose. They just stretch from age, you could torque ubolts and back it out and your torque setting will be moot.

as long as your breaker bar isnt over 5 feet or your impact is less than 1000 ft/lb rated you should be fine on whatever you can get them too.

Also driveshafterw can you please proof read what you post before you post it, kinda makes it hard to read when 1/3 of it was short hand that I feel like only you may understand.

sorry ikant spell to good i kan build drivelines in my sleep though

 

[OldFJ62]

Hi all. I had the exact same thing happen to me which is that my fj62 started to vibrate after installing the 2.5” ome lift around 25 to 35 mph. On the first page, a fellow mud blogger mention that the follolink has valueable information Driveline 101. Well it sure does. Bottom line is that there are two things that can cuase vine in the drive line. 1st is your yolks can be out of phase in the drive shaft. 2nd your transfer case flange and your pinion flange may be out of the aceptable parrellel range. For me it was the 1st that solved my problem. I rebuilt my transfer case and found that i had reinstalled the drive shaft with the yolk that hold the u joint out of phase. After realigning them the vibration completely went away. Good luck on your trouble shooting on future fj62 owners!!

 

[OldFJ62]

My did the same thing at the same speeds after installing 2.5” ome lift. My drive shaft yolks where out of phase. I put them in phase and 100% of the vibe went away. Amen thank you Jesus.