For about 5 months, I have chased down a strange vibration mystery in my 1971 IIA swb...
Symptom vibration between 1700 rpm and 2900 rpm in second and third gear.
Thinking one of 3 things:
1. Something wrong with Carb (weber 34ich) carb idles fine and motor will rev to any amount without a miss, no popping or other concerns. (Entire ignition replaced did not seem to matter)
2. Something wrong with 2nd and 3rd gear bearings? Under load there is a vibration but with clutch in it goes away...
3. SOmething wrong with propshaft. Will vibrate a bit around 65 mph but have changed UJoints and there seems to be no free play in splines.
Truly am at a loss. The vibration goes away around 3k rpm in second and third gear. First and fourth have no issues...
Can not decide if it is the motor shaking under load, or??? Motor mounts and tranny mounts seem "good"
Thanks for your help.
Griswald
Symptom vibration between 1700 rpm and 2900 rpm in second and third gear.
Thinking one of 3 things:
1. Something wrong with Carb (weber 34ich) carb idles fine and motor will rev to any amount without a miss, no popping or other concerns. (Entire ignition replaced did not seem to matter)
2. Something wrong with 2nd and 3rd gear bearings? Under load there is a vibration but with clutch in it goes away...
3. SOmething wrong with propshaft. Will vibrate a bit around 65 mph but have changed UJoints and there seems to be no free play in splines.
Truly am at a loss. The vibration goes away around 3k rpm in second and third gear. First and fourth have no issues...
Can not decide if it is the motor shaking under load, or??? Motor mounts and tranny mounts seem "good"
Thanks for your help.
Griswald
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