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Driveline Vibration |
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WesternRed 
AMC Addicted 
Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5799 |
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 Topic: Driveline VibrationPosted: Mar/19/2017 at 8:47am |
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My 69 Javelin seems to have developed a noticeable vibration when you lift off in top gear and the driveline is in overrun. It might be happening in other gears, but it's not really noticeable. This is with a BW M11B auto. Any thoughts on what might be causing this? I haven't really had time to have a good look at it yet.
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Doug in New Freedom
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Joined: Aug/02/2014 Location: NEW FREEDOM, PA Status: Offline Points: 149 |
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Posted: Mar/19/2017 at 9:04am |
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First thing I'd check would be your Universal Joints?
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amcglass
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Posted: Mar/19/2017 at 9:23am |
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Wheel balance weights may be the cause
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Javmanpres
BBG Mark Donohue 401 74 Jav/AMX 71 Matador 2dr sedan delivery wagon 1902 Rambler Runabout 70 T/A Javelin |
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1970390amx
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Posted: Mar/19/2017 at 11:00am |
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As has been said I would look at u joints. Also motor and trans mounts. Leaf spring bushings or u bolts that hold the diff to the springs that are loose can cause problems.
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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FSJunkie
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Posted: Mar/19/2017 at 11:56am |
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Wheel balance would typically show vibration all the time. Likely u-joints, u-joint angles, or rear suspension mounting problems.
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1955 Packard
1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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990V8
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Posted: Mar/19/2017 at 5:03pm |
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Vibes on overrun - I'd start with the rear u/j.
Ivor Edited by 990V8 - Mar/20/2017 at 5:14pm |
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63 Canadian Ambo 990 V8 327
74 LandRover Lightweight V8 SIII Shopping Trolley |
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6PakBee
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Posted: Mar/19/2017 at 5:05pm |
Just so I understand completely, your term "overrun" is what this side of the pond might call "coast"? |
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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Lyle
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Posted: Mar/19/2017 at 8:50pm |
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While checking the U-joints also look at the driveshaft as well for lost balance weights and dents. Ask yourself when this started and did anything unusual happen or did you change anything? My Dad dented a driveshaft after going over a dead coon on the road. Just do a detailed inspection - including the U-joints as stated above.
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MARTINSR
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Posted: Mar/19/2017 at 9:35pm |
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I had this issue in my American, U joints were the cause.
Brian
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1959 Rambler American daily driver. And I mean EVERY SINGLE day.
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WesternRed
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Posted: Mar/19/2017 at 10:49pm |
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Overrun/coast, more or less the same thing.
Will start with the uni joints, that was my initial thought too. Not sure when it started, but does seem to be getting progressively worse over time. |
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WesternRed wrote: