Leading Arm Bushing Orientation

[TheRareElement]

Happy New Year
I am about to change the bushings on the leading arms of my 97 80 series, 2 failed so far in 452K Km's.
Found the following hint in 2 FSM's,

Can anyone advise the reasoning behind this hint............just out of curiosity ?
Thanks
-Marwan

 

[crikeymike]

Replacing with oe bushings, with holes centered? No idea why they would suggest an orientation unless they were eccentric caster correction bushings (offset).

Maybe it's something to do with the flex of the bushings? Who knows...

 

[inkpot]

OEM design was probably most concerned with maximum comfort/soft ride, as opposed to the max suspension travel that some of us want now, 20 years later. John

 

[TheRareElement]

Maybe it's something to do with the flex of the bushings? Who knows...[/QUOTE]

Who knows ?......That is the question.
Any possibility for a more "technical" answer

 

[mudgudgeon]

align with the holes vertical, it helps the bush flex, but keeps solid rubber fore and aft of the bolt so the axle alignment stays firm.

I've drilled out the holes larger in the past, and added extra holes to assist with flex offroad bushes fail faster though

 

[TheRareElement]

There we go, I guess that puts an end to that question unless someone else has more to say.
Thanks Mudgudgeon

 

[LandCruiserPhil]

Front bushing TSB

 

[TheRareElement]

There we go again
LC Phil......any technical reasoning behind this new and/or the old orientation ?

 

[LandCruiserPhil]

There we go again
LC Phil......any technical reasoning behind this new and/or the old orientation ?

 

[mudgudgeon]

well, . . . .


that makes things clear as mud!

thanks Mud!

 

[sunrk]

Interesting - I've just fitted new bushes to the right side radius arm (not oem arm) and aligned them all with the holes vertically positioned. Genuine Toyota bushes though.

 

[LandLocked93]

Interesting - I've just fitted new bushes to the right side radius arm (not oem arm) and aligned them all with the holes vertically positioned. Genuine Toyota bushes though.

You've done it wrong.

Clearly the wampams go in the new orientation.

 

[sunrk]

Well seems so but nobody ever answered the question when it was asked why. I've already fitted the arm back to the 80, still need to do the left side arm if I have time.

Is there a link to Toyota TSB's for 80 series btw?

 

[NorCalFJ100]

Here is the PDF

 

[LandLocked93]

One out of two aint bad.