70 duster rear brake drum/vibration question
Hello... I have a 1970 Plymouth duster. 340 4 speed. New clutch, rebuilt a833, new trans mount, new “balanced” driveshaft with new ujoints, rebuilt 8-3/4. Pinion angle checked and set. New brakes, wheel bearings, wheel studs and drums.
I have 2 questions I need help with. I’m chasing a high speed vibration. Ready to burn car lol.
At 130km or 80 mphish the car developes the most violent vibration I’ve ever experienced. I can’t push through it and have to back off immediately or the world is gonna end. At this moment it hits The shift lever, clutch pedal and floor are experiencing brutal vibrations. Feels like it’s coming from the trans area but everything on car is new and aligned. Runs perfect at lower speeds. At 100km a slight vibration starts but I can pull outa it. At 130 she’s done!!!! 4th gear it happens in nothing changes if I push the clutch and pull into neautral vib still there in or outa gear while at that speed...... A hot rod that can’t go fast uhg ready to bail from the Abody world as this vibration has cost me thousands in Trying to sort out.
I’m running 14x5.5 ralleys small bolt pattern. I’m not suspicious of a slightly bent rim as I bought these used. Ordered new rims from wheel vintiques they are 4 weeks away here in Canada. Sadly I can’t change the tires/ rims yet. So that’s my 1sts suspicion although the vibration to me doesn’t seem like a wheel as it’s felt on the shift lever and clutch pedal mostly.
A while back I bought a set of 10 inch brake drums from classic industries. One drum has maybe a couple oz weight the other has massive weights!!!!!! It makes me suspicious the darn drum is outa wack!!!!!!
These drums fit goofy to the backing plates as they touch in the odd spot. Grinded the plate to clear in few spots which sickened me..... where do you guys get your rear 10 inch brake drums for these abodies? Small bolt pattern 5x4 so I’ve learned options are skimpy but come on Gotta be some that work better....??? The old 10 inch bell drums I had were toast!!!!! Anyone make rero bell drums for my 8-3/4? Also no I’m not into spending a dime in changing bolt patterns to gain more options, just looking for sbp options. Anyone have some good shape 10 inch sbp bell drums they wanna ship up to Canada? Lol.
Very suspicious of the drums I’ll attach a couple
Pics and you can see the diff weights on each drum it looks suspicious to me and at 80mph could be a vibration nightmare ??????
Help with some advice? At the end of my rope chasing this vibration
Hello... I have a 1970 Plymouth duster. 340 4 speed. New clutch, rebuilt a833, new trans mount, new “balanced” driveshaft with new ujoints, rebuilt 8-3/4. Pinion angle checked and set. New brakes, wheel bearings, wheel studs and drums.
I have 2 questions I need help with. I’m chasing a high speed vibration. Ready to burn car lol.
At 130km or 80 mphish the car developes the most violent vibration I’ve ever experienced. I can’t push through it and have to back off immediately or the world is gonna end. At this moment it hits The shift lever, clutch pedal and floor are experiencing brutal vibrations. Feels like it’s coming from the trans area but everything on car is new and aligned. Runs perfect at lower speeds. At 100km a slight vibration starts but I can pull outa it. At 130 she’s done!!!! 4th gear it happens in nothing changes if I push the clutch and pull into neautral vib still there in or outa gear while at that speed...... A hot rod that can’t go fast uhg ready to bail from the Abody world as this vibration has cost me thousands in Trying to sort out.
I’m running 14x5.5 ralleys small bolt pattern. I’m not suspicious of a slightly bent rim as I bought these used. Ordered new rims from wheel vintiques they are 4 weeks away here in Canada. Sadly I can’t change the tires/ rims yet. So that’s my 1sts suspicion although the vibration to me doesn’t seem like a wheel as it’s felt on the shift lever and clutch pedal mostly.
A while back I bought a set of 10 inch brake drums from classic industries. One drum has maybe a couple oz weight the other has massive weights!!!!!! It makes me suspicious the darn drum is outa wack!!!!!!
These drums fit goofy to the backing plates as they touch in the odd spot. Grinded the plate to clear in few spots which sickened me..... where do you guys get your rear 10 inch brake drums for these abodies? Small bolt pattern 5x4 so I’ve learned options are skimpy but come on Gotta be some that work better....??? The old 10 inch bell drums I had were toast!!!!! Anyone make rero bell drums for my 8-3/4? Also no I’m not into spending a dime in changing bolt patterns to gain more options, just looking for sbp options. Anyone have some good shape 10 inch sbp bell drums they wanna ship up to Canada? Lol.
Very suspicious of the drums I’ll attach a couple
Pics and you can see the diff weights on each drum it looks suspicious to me and at 80mph could be a vibration nightmare ??????
Help with some advice? At the end of my rope chasing this vibration
