I've been experiencing a slight vibration under heavy acceleration lately around 20 MPH. Assuming it was the driveshaft, I went up in the garage to examine my private stock. :Brow: I found a good '66 driveshaft.....and I was pleasantly surprised to discover that it is solid as opposed to being a rubber sandwich like the '67 shaft. Also, the front section has a dampener ring that the '67 does not have. I also noticed that the rear half of all 3 of the spare '67 shafts I have are twisted just a little, throwing them out of phase. That's the section that has rubber sandwiched inbetween the tubing. The solid '66 shaft is perfectly phased b/c it can't twist within itself. Needless to say, since I put in the '66 driveshaft, my vibration problems are gone. Here's a photo of the 2 different shafts side by side.....the one on the right is the '66:
Here's the difference where the rear half goes.......the one on the right is the '66. You can see the rubber sandwich on the '67 shaft on the left:
I know....prolly a lot of wasted HP there to turn the thing! :laugh: One more thing I noticed........the '66 shaft didn't have an index where the two halves come together but all the '67's did. I put it back together in the same position as the other ones just to be safe. Maybe the clip was just missing? o No:
Interesting I'd Like To Find A 66' Shaft For A Spare (i've Wasted 4 Of These Things In The Time I've Had My 68.) Ironically, The 3.42 Rear In My Car Is From A 66-wish I'd Have Known To Take The Shaft Too. Good Reference Material For Sure.
Good, info! Learned something when it comes to when those darn rubber isolated driveshafts came into being. Will keep my eyes peeled. :3gears: Roger
