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Vibration when torque converter locks up

stocky

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Got a real annoying problem with the VN. When the torque covnerter locks in at 80-100km/h, i get a real bad vibration through the entire car. i thought it was the tailshaft but looks like i was wrong.
i took the old tailshaft out, and the CV joint was absolutely rooted, so i thought i had found the problem. put a new tailshaft in, but the problem remains. what else could cause this vibration?
 

greenfoam

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How old is the mount?
 

stocky

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probably pretty old. will be checking it out tomorrow when i attempt to fix a kickdown cable leak
 

delcowizzid

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worn out torque converter clutch replace torque converter
 

stocky

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ok so far ive replaced the tailshaft and the transmission mount, same problem. would it be the torque converter? i also have 3.45:1 diff gears if that matters. they cause the tcc to lockup earlier than usual
 

rob drag racer

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vp 3.8 with gas new project vn s1 guted strip only
i had the same issue it turned out to be a miss fire one of my coils had a crack in it but would only show up wile the car hit overdrive at 80 plus km per hour
having said that ive never heard of my issue causing my problem before but its always worth a look

i will also be looking at doing my converter soon i have 2 good spares :D
 

HSV99

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Definately could be the converter. Had a similar problem with mine. Soon as the converter would lock up if I gave it light throttle just cruising I'd get a brutal noise through the car. Checked the rear end and even replaced a few bits but it ended up being the lock up clutch. Definately worth a look.
 

CoMrAdE MaRx23

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You have obviously checked your engine mounts aswell?
 

rob drag racer

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vp 3.8 with gas new project vn s1 guted strip only
hmm interesting. i have a spare set of coils i can throw on

as i said its worth a try before ya go to the trouble of another converter :thumbsup:
 
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