ome lift now have vibration (didnt before)

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Spending more money on this without trying the "Free" options that some of us gave you would be stupid, I really dont think it is a driveshaft if the vibration wasnt there before, yes its running at a different angle but if that was the case previous to the install is would have vibed when hitting bumps and unloading the suspension

Shove a wood wedge in there like was previously suggested, or shove a piece of metal in the back of the spring perch to get the pinion down like I suggested, seriously try a couple free jobs before you spend any money cause its probably gonna be wasted.

A high dollar drive shaft will deffineley fix it cause its made to handle uneven and high angles but why fix something with money that isnt really broken it just needs to be tweaked. Not to mention it might just wear out the new drive shaft if it isnt really right!!!!

Dont step over dollars to pick up dimes.
 
gotcha today im off i will give it another try -- going to find some wood wedge to put in - driving around with the large tires in the back it has made a little difference in how smooth it takes off so i know im on the right track - just wish i could replace the new ujoint i put in and switch out the flange without messing it up and then i wouldnt have to take it to anyone for that -- will update today
 
thought and thought so i went today and took it to the driveshaft place and they balanced and checked the new ujoint i had on there that was stiff in one direction - they rotated the c rings and it loosened up some - was told it would be ok that way (so i didnt need another flange or ujoint) so they balanced it and i was told it was out a little where the shafts meet up together or something so now its balanced -- so its probably not going to be the reason for the vibes -- but they did explain to me how to get the pinion angle correct -- i never got the angle of the driveshaft itself to do the math -- ill update when i get that done and it back installed -- so gas plus $70 for that


good link to video talking about finding angles ------ http://spicerparts.com/anglemaster/measuring-angles




driveshaft angle is @ 8 degrees down
transfercase @ 0 (actually .5 degrees down or 90.5 degrees from angle finder (pic)------- take (8. - .5) = 7.5 degrees
diff/axle @ 2.5 degrees up or reading 92.5 up from angle finder ok not sure here becuase the < is up so (8 + 2.5) = 10.5 degrees



so this would = ? (10.5 - 7.5) = 3 degrees


(if this is correct it is still out and under load would be another degree out)

with the angle of the truck with the tires now -- the angle has changed to 1 up - it is hard to tell the vib at around 25 but i can tell its a different sound most wouldnt be able to tell if just driving for the first time but i notice because it was worse in that range of speed -- but i have ordered wheel spacers and will be putting the front tires on soon so it will be back to the other angles i guess ------ just not sure what size shim to get - i picked up some at advance not the correct type for this truck but is 2 degree shims i got 2 sets so i could play around with the angles and see -- will update soon


please correct me if im wrong
 
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A 3 degree difference would probably give you some vibrations. My personal opinion without seeing the truck in person is that you still need to rotate the pinion down,

One thing to note - when engine breaking from a higher speed, like coming off the interstate, does it get any smoother? That would be the opposite of acceleration and rotate the pinion down just a hair.
 
Changing tires front to back ( different heights ) will not affect your driveline angle. Try the cheapie shims and then replace them with a single steel shim.

Georg @ Valley Hybrids
 
The shackles are the cause of your angle problem. They look like 2' extended shackles which give you about 1' lift. Logic will tell you if you lift the rear of the spring your pinion angle will angle down.If you are concerned about springs inverting just use stock length anti inversion shackles. You don't say what height lift you got but if you got 3" you will find they have given you 2" spring and 1" shackle lift . take it back and get 3" spring lift and problem (and vibration) is gone.
 
stockhorse said:
The shackles are the cause of your angle problem. They look like 2' extended shackles which give you about 1' lift. Logic will tell you if you lift the rear of the spring your pinion angle will angle down.If you are concerned about springs inverting just use stock length anti inversion shackles. You don't say what height lift you got but if you got 3" you will find they have given you 2" spring and 1" shackle lift . take it back and get 3" spring lift and problem (and vibration) is gone.
Click to expand...

He bought the lift used so he can't take it back and in my case I used the ome shacklles which are the same length as stock and I still have the vibration.
 
That would prove that it is not the pinion angle creating the problem wouldn't it ?
OME are not popular in Australia anymore, perhaps this is the reason or part thereof?
 
I'm positive its the pinion angle on mine. I wonder if there was a batch of springs that ome put out with this problem. I installed mine fall of 2008. I have heard since arb switched to dakkar I think the quality has gone down.
 
- that amazon angle finder looks like a good one for the price

yeah the lift is used --- or most of it is
 
The only thing you need to know ate two angles:

Rear pinion flange

And

Tcase rear output flange

Period!

Tire size, lift, shackle length, driveway angle, price of tea in china ....... are all irrelevant.

Georg @ Valley Hybrids
 
orangefj45 said:
The only thing you need to know ate two angles:

Rear pinion flange

And

Tcase rear output flange

Period!

Tire size, lift, shackle length, driveway angle, price of tea in china ....... are all irrelevant.

Georg @ Valley Hybrids
Click to expand...

Exactly. Although, tea in china? I have seen that come in to play every once-in-a-while.
 
ok thanks georg -- will call soon for another shim - raining today as usual around these neck of the woods
 
small update:

added the front larger tires with 1.5" wheel spacers and noticed the vibs changed some (got worse) small vibs up to 25mph more noticed at 25mph

before same vibs with the small tires

with this setup the vibs were only at the 25 mph range


well tried something after reading through the threads - took out the zerk in the driveshaft -- vibrations almost gone if any really feels better in 1st, 2nd getting up to speed doesnt feel as if it is strungling as bad because of vibs - then feel slight at 25 mph very small vib and thats a maybe -- i read a driveline shop page somewhere on the net saying to fill the drive shaft up with grease to fill the space at the end - so i guess this isnt a good thing for ours -- im going to take it back out and make sure just the splines have grease -- hope this would be correct since taking out the zerk must release pressure someway -- wonder why the drive shaft place didnt notice this - just said "it was balanced now" - but they did mention they couldnt push it in by hand without taking the zerk out and when they did a big puff of air came out -- i already was removing the zerk that way before just to get it off of the truck - learned that after reading here on mud the first time i couldnt remove it --


so shims still needed to correct the angles to spec and also need shims for the caster because its all over the road crazy - had front end aligned $35 buck old school place yesterday so toe is correct but will need shims - at first was told by toyota it is .5 for caster so the alignment guy said i would need a 2 degree shim to fix caster to .5 (they didnt have any shims) - talked with georg said it needs to be 1-2+ so im thinking of 3-4 degree shims since you cant get 3.5 degrees - not sure ----

update: ordered 2 sets of steel 4 degree shims for front caster and rear pinion - will update when installed

update: now i think why im having trouble and some have not -- the shackles on mine are the 4" lift --
 
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yesterday and today got the 4 degree shims installed for the front and rear --
the vehicle no longer wonders all over the road and the vibrations are gone in 2wd --

i also purchased a new ome rear A spring and installed that - so i now have two A rear springs instead of the A and B -- so its now not leaning to one side from the rear -- i went with the A instead of another B because i kinda like the stinkbug look -- and if i ever need to pull a trailer it will be ok and not be dragging --

will post up some pics soon -- havent measured the new angle yet but will do that to see what it is
 
Good to hear
 
Righton Heath!
Glad you've got those issues figured out. Thanks for sending some business my way.
The vibration in 4wd is caused partially by the loose tcase front output and the angle of the flanges for the front driveline. Since you can't change the flange angles easily ( that would require a cut-n-turn ), you could opt for a cv front driveline. If that's what you plan on doing, then find a front cv shaft from an earlier FJ60. You'll need to have it lengthened and the bolt pattern won't match up. But you can drill the required pattern into the pinion and tcase flanges.
Hth
Georg @ Valley Hybrids
 
Hope you have it figured out....I know those things can really be aggravating.
 
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