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Discussion Starter #1
i changed my 67 from a glide to a 4 speed Muncie. ever since i did that i have a viberation from around 50 mph on up.
i had the flywheel and pressure plate balanced using the same drive shaft that i had with the glide which did not shake at all, not even up past the speed limit (not that i woud ever break the law) :)
anyway i took the trans to a shop that rebuilds them and it cost me over a grand and it still vibrates
any thoughts
thanks bobby
 

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Check the pinion angle. That can cause strange vibes, especially when you're accellerating or decellarating.

Dave
 

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Drive shaft is too long.

Putting the trans & rear in a bind.

Check on a drive on lift. So you can look at engagement with vehicle on the ground.

AL
 

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Probably a really stupid question but you did put a pilot bearing in the crank shaft. My dad had one that did the vibration thing at higher speeds and found the pilot bearing worn.
 

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Discussion Starter #6
thanks guys
pinion angle was the same as with the glide, drive shaft has enough room that i can push it into the tail shaft by more than 2 inches.
i can HAMMER this thing in first and second gear and not till i get up to around 50 mph do i notice the vib. i can coast going down hill put the trans in nutral so the engine is at idle and the vib is still there.

like i said with the automatic i could go up to 90 and it was smooth.
put the 4 speed in and viberation.
same tires, drive shaft, rear, and yes i put a piolt bering in the rear of the crank
bobby green
 

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Probably a really stupid question but you did put a pilot bearing in the crank shaft. My dad had one that did the vibration thing at higher speeds and found the pilot bearing worn.
Is it just speed or also RPM related?
 

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Nova Vibe

Are you saying that you can push your slip yolk into the trans 2"? If so It sounds like you my not have enough engagement, of the slip yolk into the trans ? That will give you a nice vibe. Is the glide longer than the 4 speed? Just a thought? drag69
 

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check um ujoints :yes: heep bad when um drive shaft comes through mighty buffalo taking out mighty indian cheif ............ j/k i would look at your ujoints remember automatics take up the slack in the drive line where as manual trannys dont maybe have it rebalanced too just my opinion
 

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Are you saying that you can push your slip yolk into the trans 2"? If so It sounds like you my not have enough engagement, of the slip yolk into the trans ? That will give you a nice vibe. Is the glide longer than the 4 speed? Just a thought? drag69
I agree with drag69. You should only be able to push the driveshaft in an inch from the installed position. In other words, when the drive shaft is installed you should only have an inch of the yoke shaft exposed.
 

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check um ujoints :yes: heep bad when um drive shaft comes through mighty buffalo taking out mighty indian cheif ............ j/k i would look at your ujoints remember automatics take up the slack in the drive line where as manual trannys dont maybe have it rebalanced too just my opinion
i have no idea what you just said....and please don't try and help me understand either

are you sure its a driveline vibration?

take notice of when its happening and what effects it

ujoints would be the easiest thing to check, try there first, i would pull the shaft out and see if they're dry and moving freely
 

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wonder if ,,

thanks guys
pinion angle was the same as with the glide, drive shaft has enough room that i can push it into the tail shaft by more than 2 inches.
i can HAMMER this thing in first and second gear and not till i get up to around 50 mph do i notice the vib. i can coast going down hill put the trans in nutral so the engine is at idle and the vib is still there.

like i said with the automatic i could go up to 90 and it was smooth.
put the 4 speed in and viberation.
same tires, drive shaft, rear, and yes i put a piolt bering in the rear of the crank
bobby green
wonder if you might have a pinion bearing going bad , or has some slack in it ?? A vibration will sound like the speed its rotating. With it vibrating while coasting sounds like something in the rearend maybe.
 

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thats a good point, with the driveshaft out, try and take some weight off the axles and spin the pinion by hand and see if it feels nasty....or run the car in the air and take a listen
 

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When you find out what the problem was, please let us know.

pops
 

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ujoints would be the easiest thing to check, try there first, i would pull the shaft out and see if they're dry and moving freely
Even easier would be tires. Out of balance or tread seperation couse cause this, too.

Dave
 

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Did you change anything else when doing the swap? Another thing & I have seen this a few times and it makes no sense but try undoing the drive shaft, rotate the shaft 180 degrees and reinstall. This has happened more than once to my customers when getting transmission work done after we did the rear diff. I mark the driveline before removal so I get it back in place but some shops don't pay attention.

Miles
 

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Discussion Starter #20
when i did the swap all i changed was the trans
same tires, rear, drive shaft, and i marked it so i know that it is in the rear the exact smae way it was when the car was new
i am the 2nd owner of this car.
after the swap i drove it for a year and then redid the rear 4:56 gears and all new u-joints all new bearing in the rear. and added a fire breathing 327 with 2x4's
i bought the trans from a guy how had a 67 nova like mine and i still beleive there is something in the trans that is causing this viberation.
the guy i bought it from said he had it rebuilt and had paper work from a place in NJ. i took the side cover off and i could see new parts in it.
after the year of driving it i found it would not go into 3rd & 4th easy so i had it rebuilt by a guy that i trust. Moose crew guy in PA. and after all those new parts it's still not right
i want to see what it will do @ Maple Grove but don't want to take a chance till it's ok
bobby
 
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