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Author
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Topic: Vibration at the same rpm every gear
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Green_Machine650
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Member # 10459
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posted
 
 
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.
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Bay Area Stunnaz
Posts: 41 | From: So. San Francisco | Registered: Nov 2010
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redvenom
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Member # 12651
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posted
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
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1990 Gt
Some what stock
1993 GT vert-(stolen)
Posts: 623 | From: cali | Registered: Dec 2012
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racsirx
CAFords OG
Member # 1710
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posted
Might be pinion angle check to see if your yoke has excessive wear
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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
17 GT350 #5556
GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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WILDMAN97
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Member # 9138
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posted
Does it vibrate in neutral? Check the balancer.
Posts: 260 | From: Modesto | Registered: Apr 2009
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Tom Renzo
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Member # 13165
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posted
Most likely the harmonic balancer. Check to see if it spun on the cushion. Very common on the 5.0
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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racsirx
CAFords OG
Member # 1710
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posted
If it's a bad balancer then it wouldn't be smooth before and after the trouble rpm area.
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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
17 GT350 #5556
GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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racsirx
CAFords OG
Member # 1710
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posted
Just pull the driveshaft and if the yoke looks like this then it's pinion angle
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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
17 GT350 #5556
GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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30Tunes
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Member # 8105
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posted
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
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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mikeceli
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Member # 8389
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posted
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?
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God Bless America!
88 Mark VII LSC/00 Excursion Diesel/94 Thunderbird SC/01 Corvette/79 "Bandit" Trans Am/83 Cordoba
Posts: 33 | From: N. California, Sonoma County | Registered: May 2008
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30Tunes
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Member # 8105
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posted
Yeah, it was easily noticeable when I actually took the time to look. Took 15-20 min to change.
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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Tom Renzo
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Member # 13165
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posted
Why would his pinion angle be off???
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Duncan Motors
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Member # 7045
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posted
lowered on these cars to much will effect pinion angle.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Tom Renzo
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Member # 13165
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posted
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 ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Duncan Motors
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Member # 7045
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posted
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.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Tom Renzo
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Member # 13165
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posted
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.
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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racsirx
CAFords OG
Member # 1710
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posted
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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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
17 GT350 #5556
GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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