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-   -   need some help on vibration issues.. (http://www.risingsun4x4club.org/forum2/showthread.php?t=5231)

rover67 11-13-2007 09:43 PM

need some help on vibration issues..
 
hello all,

new to the area and excited about meeting new people.. went to the meeting this past wednseday an met a few new people, looking to be an active member of the club soon.

anyways, i have a techical question... i just got done doing a v-8 swap, 4 runner breaks, rebuild both axles, did the t case and insltalled a h55f, and did rebuilt driveshafts... all in one fail swoop.

the truck has some weird vibrations at 45-65mph (indicated) and i'd love for someobody to drive it or ride in it and help me figure out what the heck is going on. anybody interested? free ride in a 5.3 liter 300hp cruiser... i am in lafayette, co. it made it 1500 miles from memphis doing 80mph the whle way so it can't be that bad but i just dont know. also, need to find a place to put the front end through its paces to see if i put the oil pan on the engine far enough away from the axle to keep it from hitting... i think the dude that did my third member in the rear may have not set it up right,

anyone... bueler....

MDH33 11-13-2007 09:52 PM

Missed the meeting, so didn't meet you. Can you tell me what kind of vehicle it is????

:o

Uncle Ben 11-13-2007 09:53 PM

Quote:

Originally Posted by rover67 (Post 51020)
hello all,

new to the area and excited about meeting new people.. went to the meeting this past wednseday an met a few new people, looking to be an active member of the club soon.

anyways, i have a techical question... i just got done doing a v-8 swap, 4 runner breaks, rebuild both axles, did the t case and insltalled a h55f, and did rebuilt driveshafts... all in one fail swoop.

the truck has some weird vibrations at 45-65mph (indicated) and i'd love for someobody to drive it or ride in it and help me figure out what the heck is going on. anybody interested? free ride in a 5.3 liter 300hp cruiser... i am in lafayette, co. it made it 1500 miles from memphis doing 80mph the whle way so it can't be that bad but i just dont know. also, need to find a place to put the front end through its paces to see if i put the oil pan on the engine far enough away from the axle to keep it from hitting... i think the dude that did my third member in the rear may have not set it up right,

anyone... bueler....


Do the rear dif gears "sing?" Vibrations usually come from balance rather than improper setup. I'm just guessing but did the plane of the powertrain change? In other words does the engine sit higher or lower than original? (same question for the tranny/T-case.) Use an angle finder on the rear output flange of the t-case and then check the pinion flange on the rear diff....I've got a $10 spot that the vertical planes of those two flanges are differant! :cheers:

Rezarf 11-13-2007 09:56 PM

Welcome man, I don't know about helping you diagnose your vibrations, but I will rip on your new engine in a cruiser for you :D

Does it only happen between the speeds listed or does it do it at other speeds as well?

rover67 11-13-2007 10:04 PM

it is an fj60, sorry about that, and thanks for all the attentiion!!

honestly, i dont knwo if the angles changed much, i dont think they did since the i tied to keep the centerline of the engine (crank) in the same spot as original...

MDH33 11-13-2007 10:13 PM

Could be the pinion angles as UB mentioned, also makes me think about improperly balanced or overly worn tires. My 60 was just cured of the shakes by adding some new properly balanced rubber. :thumb:

rover67 11-13-2007 10:15 PM

i got new bfg at's right before i left memphis.....

Uncle Ben 11-13-2007 10:59 PM

Quote:

Originally Posted by rover67 (Post 51032)
it is an fj60, sorry about that, and thanks for all the attentiion!!

honestly, i dont knwo if the angles changed much, i dont think they did since the i tied to keep the centerline of the engine (crank) in the same spot as original...


Even if you slightly changed the centerline....it only takes 2* to start causing vibrations!

rover67 11-14-2007 07:17 AM

okey dokie. i'll swing under there and put angle finders on there to see.

one other thing that i noticed, if the t case is in 4wd but the hubs in front are not locked, i get another horrible vibration from the front. this one feels like something is loose though... so i'll look for loose stuff when i flip under it. i'll stop by lowes at lunch today and get an angle finder..

subzali 11-14-2007 07:43 AM

Heya, I met you for a quick minute right before you left, now I forgot your name :o. Welcome to the board!

Does this vibration (the one you just mentioned) also happen if the hubs are locked but the t-case is not engaged? The same items should be spinning except the t-case output shaft, don't know if it will help you narrow it down at all. Check for loose springs, knuckle studs, etc.

Good luck!


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