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B Body Dana 60, Pinion Snubber, Driveline Vibration #326644 05/23/09 09:43 PM 05/23/09 09:43 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Fellas - My 68 RR (hemi, 727, Dana 60) has some driveline vibration at about 60+ mph. Wasn't happening until recently. Lubed the u joints (I need to swap to solid u joints) today, checked u bolts for tightness. Got pulled over on the test drive (he liked the car, no ticket), but still vibrating. Car does not have a pinion snubber. When I got underneath, I saw where it looks like the very rear of the driveshaft smacked the floorpan - must have been an extreme angle. My guess is that I tweaked the rear u joint when this happened. My plan - drop the driveshaft, get solid Spicer u joints installed. Install a pinion snubber. Driveshaft stuff I can handle, but any ideas on a good pinion snubber? Doesn't have to be 100% correct Mopar; car is slightly modified, and it's not going to be concourse judged. Thanks, Scott Last edited by bulletpruf; 05/23/09 09:47 PM. Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326645 05/24/09 01:21 PM 05/24/09 01:21 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Driveshaft is out and will go to the shop Monday or Tuesday. Any recommendations on pinion snubbers? Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326646 05/24/09 09:28 PM 05/24/09 09:28 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Feel like I'm having a one-sided conversation here, but I bought a Mopar adjustable pinion snubber from Jeg's... Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326647 05/24/09 11:02 PM 05/24/09 11:02 PM
Joined: Mar 2005 Posts: 546 Stuart FL M mercman1 mopar
mercman1 mopar M Joined: Mar 2005 Posts: 546 Stuart FL	Quote: Feel like I'm having a one-sided conversation here, but I bought a Mopar adjustable pinion snubber from Jeg's... What rpm is the engine turning when the vibration starts and can you drive through it? Say it starts at 3500 and vibrates til 4800??? will it vibrate in neutral at the same rpm???

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: mercman1] #326648 05/25/09 12:07 AM 05/25/09 12:07 AM
Joined: Jan 2003 Posts: 5,788 Hamilton, Ontario Canada Magnum master
Magnum master Joined: Jan 2003 Posts: 5,788 Hamilton, Ontario Canada	I don't like pinion snubbers. They hinder suspension travel. If the universal joint is going that high from axle wrap it's the fault of weak leaf springs. Is the vibration speed or rpm related? I correct my statement. I don't like adjustable pinion snubbers. The factory one will not hinder travel. Last edited by Magnum; 05/25/09 10:29 AM. 69 Super Bee, 93 Mustang LX, 04 Allure Super

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: mercman1] #326649 05/25/09 12:09 AM 05/25/09 12:09 AM
Joined: Mar 2003 Posts: 9,099 Rogue River, OR Jeremiah master
Jeremiah master Joined: Mar 2003 Posts: 9,099 Rogue River, OR	The snubber should help the pinion angle stay in a safe area if the rear springs are overcome by the weight transfer of the car. Many say no pinion snubber is needed however I am of the opinion that if you have to have soft springs to get the tires planted a pinion snubber will be very helpful in keeping the pinion angle safe. What springs are in the car now? I would def. have the drive shaft balanced by a known good shop with the new u-joints installed. That said let them put the joints in if you do not have the proper tools or experience. If this is the case as if you can watch. I've seen several shafts ruined by inexperienced, overzealous shadetree mechanics. At the age of 16 I started that list! If you have trouble getting a response shoot me a PM or I'd be hapy to share my experiences.

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: mercman1] #326650 05/25/09 12:53 PM 05/25/09 12:53 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Quote: Quote: Feel like I'm having a one-sided conversation here, but I bought a Mopar adjustable pinion snubber from Jeg's... What rpm is the engine turning when the vibration starts and can you drive through it? Say it starts at 3500 and vibrates til 4800??? will it vibrate in neutral at the same rpm??? I didn't check to see if it was vibrating in neutral. I feel a slight vibration at lower speeds. I also feel some clunking at low speeds when turning. Does not seem to be rpm related; seems to be more speed related. I did not try to drive through it. Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: Magnum] #326651 05/25/09 12:54 PM 05/25/09 12:54 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Quote: I don't like pinion snubbers. They hinder suspension travel. If the universal joint is going that high from axle wrap it's the fault of weak leaf springs. Is the vibration speed or rpm related? I correct my statement. I don't like adjustable pinion snubbers. The factory one will not hinder travel. Leaf springs are brand new, but not sure who manufactured them. Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: Jeremiah] #326652 05/25/09 12:57 PM 05/25/09 12:57 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Quote: The snubber should help the pinion angle stay in a safe area if the rear springs are overcome by the weight transfer of the car. Many say no pinion snubber is needed however I am of the opinion that if you have to have soft springs to get the tires planted a pinion snubber will be very helpful in keeping the pinion angle safe. What springs are in the car now? I would def. have the drive shaft balanced by a known good shop with the new u-joints installed. That said let them put the joints in if you do not have the proper tools or experience. If this is the case as if you can watch. I've seen several shafts ruined by inexperienced, overzealous shadetree mechanics. At the age of 16 I started that list! If you have trouble getting a response shoot me a PM or I'd be hapy to share my experiences. The driveshaft shop does good work and they're inexpensive, so I'll let them handle this. I need to buy a press before I mangle my own u joints. I don't like u joints with a zerk fitting anyway, so if this doesn't fix it, at least I've got good u-joints and have hopefully ruled out the driveshaft as the source of the problem. Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326653 05/25/09 07:18 PM 05/25/09 07:18 PM
Joined: Mar 2003 Posts: 9,099 Rogue River, OR Jeremiah master
Jeremiah master Joined: Mar 2003 Posts: 9,099 Rogue River, OR	Sounds good. Make sure to check all of the trans bolts, etc. while you are under there. I had a nasty driveshaft vibarto and it shook all kinds of bolts loose and almost wrecked the bellhousing. I also suspect that is ate up the trans mount. Had a new d-shaft cut and all was good other than lots and lots of loose bolts. I learn the hard way so others don't...

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: Jeremiah] #326654 05/25/09 09:14 PM 05/25/09 09:14 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Quote: Sounds good. Make sure to check all of the trans bolts, etc. while you are under there. I had a nasty driveshaft vibarto and it shook all kinds of bolts loose and almost wrecked the bellhousing. I also suspect that is ate up the trans mount. Had a new d-shaft cut and all was good other than lots and lots of loose bolts. I learn the hard way so others don't... Good point. I'll check 'em. Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326655 05/27/09 01:43 PM 05/27/09 01:43 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Driveshaft shop says the front u joint is bad. They'll replace it with a solid joint, straighten, and balance it. Should be back in the car this evening. Maybe I can take a test drive without getting pulled over this time... Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326656 05/27/09 01:50 PM 05/27/09 01:50 PM
Joined: Jan 2003 Posts: 3,967 S.I. N.Y. 1MYTGTX master
1MYTGTX master Joined: Jan 2003 Posts: 3,967 S.I. N.Y.	Cool keep us posted....subscribing 1MYTGTX

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326657 05/28/09 06:58 AM 05/28/09 06:58 AM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	#@)(&$)#@Q*I$~!!! Driveshaft went back in last night, freshly balanced, straightened, painted, new u joints front and rear. Took her for a drive and the vibration is still there. I only felt it as I was going pretty fast (maybe 60-80 mph?). Goes away when I put it in neutral. Does not appear to be rpm related; don't feel it at high rpms at lower speeds. This is getting frustrating... Any other thoughts? I'll check the trans bolts for tightness this weekend. Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326658 05/28/09 07:11 AM 05/28/09 07:11 AM
Joined: Mar 2003 Posts: 8,850 Central Coast, Calif. S Snoopy master
Snoopy master S Joined: Mar 2003 Posts: 8,850 Central Coast, Calif.	What did you determine on the length? Length should be 50.39" ctr-ctr.

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: Snoopy] #326659 05/28/09 08:56 AM 05/28/09 08:56 AM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Quote: What did you determine on the length? Length should be 50.39" ctr-ctr. Good question. The only measurement that I took was after I removed the driveshaft - from the tranny seal to the front of the pinion yoke was 54". Gave that to the driveshaft shop and they said the length was good. I'll measure it center to center this weekend and see what I end up with. Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326660 05/28/09 09:50 AM 05/28/09 09:50 AM
Joined: Jan 2003 Posts: 8,016 Polson, MT DoctorDiff master
DoctorDiff master Joined: Jan 2003 Posts: 8,016 Polson, MT	Are you running a poly transmission mount, or a stock (rubber) transmission mount? What is the angle of your transmission centerline? Up or down toward the rear? What is the angle of your pinion centerline? Up or down toward the rear? How much driveshaft travel before the slip yoke bottoms out inside the transmission? Does the slip yoke fit fairly tight inside the transmsission tail bushing? Contact info

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: bulletpruf] #326661 05/28/09 11:22 AM 05/28/09 11:22 AM
Joined: Jan 2003 Posts: 74,974 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,974 U.S.S.A.	Quote: Driveshaft shop says the front u joint is bad. They'll replace it with a solid joint, straighten, and balance it. Should be back in the car this evening. Maybe I can take a test drive without getting pulled over this time... Thanks, Scott Why would the front joint have gone bad if the rear was what hit the floor? Also STRAIGHTEN ??? , straighten WHAT ???

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: DoctorDiff] #326662 05/28/09 04:41 PM 05/28/09 04:41 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Quote: Are you running a poly transmission mount, or a stock (rubber) transmission mount? What is the angle of your transmission centerline? Up or down toward the rear? What is the angle of your pinion centerline? Up or down toward the rear? How much driveshaft travel before the slip yoke bottoms out inside the transmission? Does the slip yoke fit fairly tight inside the transmsission tail bushing? Only thing that I can answer now is that the slip yoke fits fairly tight inside the tail housing. Will check the trans mount. As for the geometry questions, I'll have to check; I was under it yesterday, but the back end was way up in the air, and I didn't look to see how things were positioned in relation to each other when it was on the ground. Will report back with details. Thanks! Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

Re: B Body Dana 60, Pinion Snubber, Driveline Vibration [Re: JohnRR] #326663 05/28/09 04:45 PM 05/28/09 04:45 PM
Joined: Aug 2008 Posts: 757 Northern VA B bulletpruf OP super stock
bulletpruf OP super stock B Joined: Aug 2008 Posts: 757 Northern VA	Quote: Quote: Driveshaft shop says the front u joint is bad. They'll replace it with a solid joint, straighten, and balance it. Should be back in the car this evening. Maybe I can take a test drive without getting pulled over this time... Thanks, Scott Why would the front joint have gone bad if the rear was what hit the floor? Also STRAIGHTEN ??? , straighten WHAT ??? Driveshaft shop said that the front joint was old, and it was bad. Probably the result of age, not rear diff rotation. Surprised that they didn't replace the joint when they built the car. The shaft wasn't bent, but they check for straightness (and straighten it, if it's bent, I guess) when they balance it. Thanks, Scott Please Check Out My YouTube Channel for Vintage Musclecar and Truck Rescues and Builds -- https://www.youtube.com/@THEBULLETPROOFGARAGE/videos

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