Vibration due to Uneven Coated Shaft?++Famous Clunk Solved

[hakanerdogan]

After 2.5 months later this topic started, today I installed my brand new OEM rear shaft. And yes, vibe is gone, rides like a dream, up on the clouds. We're fine until here. But, we have another think to solve

My previous vibrating shaft was mounted the way slip yoke at the differential side. But today, after talking with many experienced mechanics, (including mine) I was convinced we should install it the way slip yoke at the transmissions side. Pfffff..... Another thing to ensure.
Today at the shop there were billions of 4x4 Toyotas, Land Cruiser Prado's, Hilux'es (you may call them small Tacoma in States, never sold there) and there was also a 5 speed LC100. All was mounted their rear shafts slip yoke at the transmission side. But why mine was came like the opposite way, no one in the country can be as idiot as to put it in the wrong way. This is my thought, may be wrong. Long story short, my previous shaft was shot, some of you who told me the buy a new unit was right, thanks for that. I am very happy. But, even if everythings fine now, I have a tail shaft mounted slip yoke close to transmissions side, but I am not sure thats right.

My LC100 is 2UZ-FE, first gen with A343 4 speed forward transmission, deleted AHC.

Thats now how it looks.

 

[94SRUNNER]

After 2.5 months later this topic started, today I installed my brand new OEM rear shaft. And yes, vibe is gone, rides like a dream, up on the clouds. We're fine until here. But, we have another think to solve

My previous vibrating shaft was mounted the way slip yoke at the differential side. But today, after talking with many experienced mechanics, (including mine) I was convinced we should install it the way slip yoke at the transmissions side. Pfffff..... Another thing to ensure.
Today at the shop there were billions of 4x4 Toyotas, Land Cruiser Prado's, Hilux'es (you may call them small Tacoma in States, never sold there) and there was also a 5 speed LC100. All was mounted their rear shafts slip yoke at the transmission side. But why mine was came like the opposite way, no one in the country can be as idiot as to put it in the wrong way. This is my thought, may be wrong. Long story short, my previous shaft was shot, some of you who told me the buy a new unit was right, thanks for that. I am very happy. But, even if everythings fine now, I have a tail shaft mounted slip yoke close to transmissions side, but I am not sure thats right.

My LC100 is 2UZ-FE, first gen with A343 4 speed forward transmission, deleted AHC.

Thats now how it looks.

Great news! Glad you got this sorted out finally.

 

[shakeandpop]

Finally, I took the front diff apart... Inside, it was not disaster actually. Yes there was a bit of free play but it was not that bad. To sum up what we did is;

-Renewed the leaking ARB air locker with its rebuild kit after 10 years. This is the worn part.



-Gears, bearings were all fine, no broken gear, acceptable metal shaving on the drain magnet. Put it back together, did the adjustment with gear paint, set to factory gap, and pray for not to whine
Some pics.






Then I just did not want to put it back with old factory bushings, they were shot. The one located on the diff cover is pain in the ass to remove. But somehow we did it, heater gun, hammer etc... Did it.







And some extras, my LC100 has ARB OME and they are 10+ years old, I took the front suspensions in order to inspect their bushings, and what happened is, loosened suspension bolts, grabbed it to pull out, then bushings inner metal tube fell on ground Toast.




Another thing, on bumpy roads, I had a clicking noise coming from steering column, I grabbed it and shaked, nearby the brake/gas pedals, it was definitely column upper bearing. So took'em apart, tons of cables, switches, wiring, narrow place to work in etc.....

Finally got it and took it to a metal works shop where they have advanced lathe machines, they replaced the shot bearing. Put back, tight as rock!

Problematic little bearing can easily be seen on second picture.






Finally, smoother front end, tight, no gap, no play, no sound.

Vibration still there at highway speeds, its the next and final thing to solve. I'll keep posted.

Fantastic work

So your R to D, and accelerator after coasting thunk(s) are solved after working on the front diff itself?

 

[hakanerdogan]

Yes, %90 of its fixed. Only slight deep tick, If you really want to hear and concentrate on it.

Fantastic work

So your R to D, and accelerator after coasting thunk(s) are solved after working on the front diff itself?

 

[awkragt]

After 2.5 months later this topic started, today I installed my brand new OEM rear shaft. And yes, vibe is gone, rides like a dream, up on the clouds. We're fine until here. But, we have another think to solve

My previous vibrating shaft was mounted the way slip yoke at the differential side. But today, after talking with many experienced mechanics, (including mine) I was convinced we should install it the way slip yoke at the transmissions side. Pfffff..... Another thing to ensure.
Today at the shop there were billions of 4x4 Toyotas, Land Cruiser Prado's, Hilux'es (you may call them small Tacoma in States, never sold there) and there was also a 5 speed LC100. All was mounted their rear shafts slip yoke at the transmission side. But why mine was came like the opposite way, no one in the country can be as idiot as to put it in the wrong way. This is my thought, may be wrong. Long story short, my previous shaft was shot, some of you who told me the buy a new unit was right, thanks for that. I am very happy. But, even if everythings fine now, I have a tail shaft mounted slip yoke close to transmissions side, but I am not sure thats right.

My LC100 is 2UZ-FE, first gen with A343 4 speed forward transmission, deleted AHC.

Thats now how it looks.

I've had a vibration between 65-75mph for about 4 years now. This thread has motivated my to dig into things again. Need to kinda start over with systematic checking of things.

 

[hakanerdogan]

I've had a vibration between 65-75mph for about 4 years now. This thread has motivated my to dig into things again. Need to kinda start over with systematic checking of things.

Start by driving at vibration speeds without each driveshafts.