" From: "Jay" <jciampi@xxxxxxxx> " " Has anyone got the service letters for the 1963-66 Ramblers that mention the " vibration problem with some cars. It was a shock that mounted horizontally " between the frame and the Right rear shock mount. It supposedly eliminated " some weird vibration problem that AMC had. I don't know if it pertained only " to the BIG car series (10/50/80) or if it included the 01 series also. since the rear suspension is pretty different, i'd be surprised if it applied to the american also. " I have this vibration from the drivetrain(I believe) at approximately 32-35 " mph, whether the car is driving ahead or just coasting(out of gear). I know " it is NOT the front wheel brgs. as I just installed all new ones due to " having a bad one on the left front. " The driveshaft u-joints have been replaced last year. Could a u-joint be " installed 180 degrees out? I get a low roaring noise above 50 mph (or so " it seems to my ears) I have convertible, so it may be wind noise. a u-joint is ordinarily a symmetrical cross. the only common exception is when the yokes are different sizes. " I intend to jack the back end up and put it on jack-stands and run it in " gear up to where the vibration comes in and see if the driveshaft is out of " balance or what else might be wrong. this can happen if the -yokes- are installed 180 deg out. usually the -entire- driveshaft - yokes and all - is balanced, so if a yoke is flipped... ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought