Landcruiser T/D Vibration

Submitted: Wednesday, Mar 10, 2004 at 22:32
ThreadID: 11157 Views:3402 Replies:5 FollowUps:3
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Guys & Gals,
Has anyone experienced a transmission vibration & noise under heavy acceleration in low gear, particularly up hill/incline in a 2003 L/C T/D ?
My vehicle has already had a blown front diff which I replaced with a ARB Air locker.
The vibration creates a noise only under heavy load and sounds & vibrates as though a cog is missing!
Other than that, LUV that vehicle.
Parso
Parso
2012 Toyota Landcruiser 200 Series Sahara.

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Reply By: Bilbo - Wednesday, Mar 10, 2004 at 23:07

Wednesday, Mar 10, 2004 at 23:07
Is that problem in "low gear" as in first or second gear ( normal driving) or in 'low range'???

Bilbo
AnswerID: 49876

Follow Up By: Parso - Wednesday, Mar 10, 2004 at 23:15

Wednesday, Mar 10, 2004 at 23:15
The problem is in high range, accelarating up a step incline
It appears to be only when the transmission is under load on an incline.
What do think Bilbo?
Parso
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Reply By: Wayne (NSW) - Thursday, Mar 11, 2004 at 06:36

Thursday, Mar 11, 2004 at 06:36
Parso,

How did the front diff blow?

I was thinking of the uni joints but they will vibrate at high speed.

Could a tooth be missing from the pinion gear in the front diff. It could have snapped of after the diff lock was put in, but this would have a problem at any speed.

Do you get noise/vibration at any other speed?

Could be a chipped tooth on first gear.

Wayne
AnswerID: 49894

Follow Up By: Parso - Thursday, Mar 11, 2004 at 09:15

Thursday, Mar 11, 2004 at 09:15
Wayne
There is a mild vibration at 80kph in top high range only.
First gear has no problems/vibration.
I m ay need to have the front diff, transfer case and gear box pulled to bits. This could cost a small fortune.
Parso
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Reply By: Rojac - Thursday, Mar 11, 2004 at 10:00

Thursday, Mar 11, 2004 at 10:00
Had similar, ended being a stuffed main shaft.
AnswerID: 49905

Reply By: Crackles - Thursday, Mar 11, 2004 at 22:45

Thursday, Mar 11, 2004 at 22:45
Parso, had a friend with a Turbo HJ78 that developed a vibration while accelerating.
They had alot of trouble locating it thinking it was in the transmission but ended up being a motor issue. Apparently Toyota developed a small valve to be added to the fuel system that fixed it. Can sympathize with your diff problem as I'm on my forth one.
Craig................
AnswerID: 50021

Reply By: Bilbo - Thursday, Mar 11, 2004 at 23:51

Thursday, Mar 11, 2004 at 23:51
Based purely on the layout of a typical gearbox and assuming the gear you are using is 5th Gear (i.e "top" as you refer to it), I reckon it's the gearbox mainshaft. Either the bearings at each end of the box are u/s ( more likely the front of the mainshaft at the front of the box) or the small roller bearing that sits inside the primary shaft that supports the mainshaft. I'd discount the front diff or any other thing that is not common only to "top gear" use. The front diff is in use all the time and then prob would show up in all gears. The above mentioned bearings are the only bearings that would be under load at your stated observation times in a conventional gearbox. However, this is based on an "old mechanic's" (me) view of things and I've never seen a drawing or the inside of a Cruiser gearbox. However, if 5th gear is an "overdrive" gear and that it sits in the back of the box as is normal in an overdrive gearbox, then it could the back mainshaft bearing. Are you showing any signs of gearbox oil around the back of the box or dripping out of the front of the box where the bellhousing meets the engine block??

Bilbo
AnswerID: 50034

Follow Up By: Parso - Friday, Mar 12, 2004 at 07:56

Friday, Mar 12, 2004 at 07:56
Bilbo
Thanks for the input.
There are no oil leaks, etc.
I'm not too concerned with the slight vibration at 80 kph, it is the vibration and noise accelerating up an incline in 2nd, 3rd & 4th gear in high range.

Thanks to all for your thoughts.
Parso
2012 Toyota Landcruiser 200 Series Sahara.

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