Dodge w100

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gilberttitan08

Mexican Hillbilly!!!
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Hey guys got a 75 dodge Powerwagon club cab 360 married 727 fulltime 4X that has this annoying vibration at 1500+rpm, whether I am in park or driving. At first I looked at my transmission mounts and noticed they were all rotten and destroyed. (Engine mounts are new.) I ordered some Polly transmission mounts and the vibration is still there. Can it be harmonic balancer, flex plate, or torque converter? Truck runs really good and smooth, besides the fact that it vibrates.
 
Pull the inspection cover off the transmission and check the torque converter to see if it has a balance weight on it where it bolts to the flex plate, from what you're describing it sounds like someone put a neutral balanced torque converter in it somehow. Also another thing to check is the damper on the front of the engine, it should either have an extra half moon piece cast into it or a half moon section that's hollowed out of it depending on year
 
Pull the inspection cover off the transmission and check the torque converter to see if it has a balance weight on it where it bolts to the flex plate, from what you're describing it sounds like someone put a neutral balanced torque converter in it somehow. Also another thing to check is the damper on the front of the engine, it should either have an extra half moon piece cast into it or a half moon section that's hollowed out of it depending on year
No, torque converter was never changed out, truck had the same torque converter for years, just starting doing this last month.
 
No, torque converter was never changed out, truck had the same torque converter for years, just starting doing this last month.
Definitely check the balancer, if someone swapped to a later damper, the outer ring can slip and throw off the balance.
Early 360 dampers had an offset weight that was part of the center and couldn't shift.
I believe your '75 should have the early piece.
 
Aside from the balancer and the usual suspects for ignition, you might also check the advance springs and plate motion in the distributor.
 
I had a vibration I thought was something in torque converter area since it started after that, but it ended up being the poly transmission mount I installed at the same time. Put a rubber one back in and all fixed.
 
So...... Changed my transmisson mounts to rubber mounts, took my damper for rebuild, torque converter looks fine, weights are on. Still have vibrations, I got a gnarly exhaust leak on back driver side. Will this contribute to vibration?
 
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