'90 F150 vibration
09-28-2007, 11:58 PM
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'90 F150 vibration
I just purchased a 1990 f150 with a 5.0 v8 and an AOD transmission.The motor is firing on all cylinders . The truck has a very bad vibration in park. Put new motor and tranny mounts on and checked flywheel weight(50 oz.) put new torque converter in too. I also had checked the harmonic balancer as well. Still vibrating! ANY THOUGHTS?
09-29-2007, 12:13 AM
#2
Beer Drinker
Do you know if anyone has ever been inside the motor? If it was rebuilt it might not have been properly spin balanced internally.
10-27-2007, 12:10 AM
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did you check to see if the balancer spun. ck the timing mark when no 1 is tdc on the comp stroke. they do go bad. or wrong one on it. or firing order could be off but still running decent. if you just bought it it could be anything. the 50oz balancer will have a big weight that goes 3/4 around it. the 28oz has a noticably smaller weight. if the rubber is sticking out or distorted on the balancer it needs to be replaced good luck