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How to tell if a gearbox mount is shagged

General Tech Talk

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How to tell if a gearbox mount is shagged

Post by pongo »

I am thinking ,mine is fugged, But im unsure how to tell. I dan move the gearbox up and down a few mm with 1 hand. My cruise control sensor used to be 3mm or so clear of the tailshaft and now its rubbing.

Is this bad ?


Its on a 90 model 4runner . I have just replacd my rear centre due to pinion leaking and noticed that 4 locking plates on the bolts of the hemisphere are now nolonger in existance.

Any ideas ?
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Joined: Tue Apr 08, 2003 7:28 pm
Location: Narellan Vale, Sydney

Post by Screwy »

the best way to tell is.... IF you cant see any splits in the rubber at all on visual inspection... and the bolts are all tight...

get a trolley jack under the gearbox or t case and put abit of upward pressure on it... not too much.... just enough to stretch the rubber mount a little so that you can see if its worn / cracked / split / or come away from the metal.....

again if its persished or oil soaked it would loose its tension over time as well....

screwy
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Posts: 3523
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Location: Fairfield,Sydney

Post by pongo »

Yeah i think it has lost its tension, there more oil under it than whats in kuwait.
Took it for a hoon up the M4 20 mins ago and The vibration is still there. It sems to be RPM related at 3100 rpm in 4th. In 3rd its Hardly noticable and i Need a bigger hill for 5th as its got a 4.3 in it till i get my other centre rebuilt again. the new rear centre helped, Its a lot quieter in the cab now.

Cheers and thanx screwy
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Joined: Tue Apr 08, 2003 7:28 pm
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Post by Screwy »

grease both uni joints and also the tailshaft slip joint as well mate as this could be half your vibration issue...

no wuckers mate, anytime

screwy ;)
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