This is topic Vibration at the same rpm every gear in forum Tech Talk at Northern California Ford Owners .
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Posted by Green_Machine650 (Member # 10459) on
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I have a vibration at the same rpms (2500-3500)every gear, after an before that it's smooth an feels fine. I feel the vibration mostly in the shifter handle. I have a mustang 5.0 with a t5 transmission and aluminum driveshaft.
Posted by red5o (Member # 12651) on
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Check U joints, drive shaft and drive shaft bolts make sure thers little to no play at the trans mount if that all good then it might be the pilot bearing
Posted by racsirx (Member # 1710) on
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Might be pinion angle check to see if your yoke has excessive wear
Posted by WILDMAN97 (Member # 9138) on
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Does it vibrate in neutral? Check the balancer.
Posted by Tom Renzo (Member # 13165) on
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Most likely the harmonic balancer. Check to see if it spun on the cushion. Very common on the 5.0
Posted by racsirx (Member # 1710) on
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If it's a bad balancer then it wouldn't be smooth before and after the trouble rpm area.
Posted by racsirx (Member # 1710) on
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Just pull the driveshaft and if the yoke looks like this then it's pinion angle
Posted by 3-0-Tunes (Member # 8105) on
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I had a bad balancer and it was vibrating bad at those rpms, it would smooth out before and after those rpms. Changed the balancer and good as new
Posted by mikeceli (Member # 8389) on
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quote:
Originally posted by 3-0-Tunes:
I had a bad balancer and it was vibrating bad at those rpms, it would smooth out before and after those rpms. Changed the balancer and good as new
Was the outer ring visibly out of position?
Posted by 3-0-Tunes (Member # 8105) on
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Yeah, it was easily noticeable when I actually took the time to look. Took 15-20 min to change.
Posted by Tom Renzo (Member # 13165) on
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Why would his pinion angle be off???
Posted by Duncan Motors (Member # 7045) on
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lowered on these cars to much will effect pinion angle.
Posted by Tom Renzo (Member # 13165) on
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I have lowered many a Ford in my career and have never seen a pinion angle out of speck by lowering the car. Also never had to correct a pinion angle after lowering. Pinion angles should be anywhere from -1* to -2 1/2* This is always what we use as a reference and lowering a stang will not effect the angle enough to even worry about it. As it is so slight it is not worth talking about it. Normal drops on a stang are 1 - 1 1/2 inches which will not change the pinion angle enough to even talk about. Just saying The yoke posted was not a pinion angle issue. Unless it was from a monster truck raised through the moon.
[ 2014-06-05, 06:10 PM: Message edited by: Tom Renzo ]
Posted by Duncan Motors (Member # 7045) on
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on this type of ford i have and they do, its not even a discussion. not sure what models fords you've referring to as of done, but the upper adjustable arms fix it on these model cars.
Posted by Tom Renzo (Member # 13165) on
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Upper arms fixes it on every car! just saying lowering it as i explained does not change the angle enough to even bother with it.
Posted by racsirx (Member # 1710) on
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I just can't believe it was the balancer and it was doing it just in certain rpms, I have had them do it down low or seem like a motor is completely coming apart, most of the time when a customer complains about a vibration that comes and goes at different rpms and I pull the driveshaft out and see a bad yoke, it's pinion angle, but changing pinion angle is a good idea any ways since it helps with traction
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