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vibration question 360 auto #296727 04/22/09 07:42 PM 04/22/09 07:42 PM
Joined: Jan 2003 Posts: 421 massachusetts P Provan OP mopar
Provan OP mopar P Joined: Jan 2003 Posts: 421 massachusetts	360 motor 727 b&m flex plate for 360, ger converter with no weights.. have a vibration around 2000 to 2500 rpm when in park, and also under acceleration around the same rpm.. pop into neutral while driving, and no vibration..all new u joints .any ideas? thanks 76 DODGE VAN PRO STREET 67 DODGE CORONET R/T 480 STROKER

Re: vibration question 360 auto [Re: Provan] #296728 04/22/09 09:35 PM 04/22/09 09:35 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Don't know what you have changed recently ( if anything - besides the u-joints - which didn't solve the problem ) to get the vibration, but you could try unbolting the convertor and rotating it 180 degrees and bolting it back up. The flex plate does have a big bite out of it for external balanced engines right? Got a big hunk of iron hanging off the trans tailshaft? That was Chryslers cure for a vibration in about that rpm range on some vehicles. Fastest 300

Re: vibration question 360 auto [Re: Provan] #296729 04/24/09 04:14 PM 04/24/09 04:14 PM
Joined: Sep 2003 Posts: 845 Utah O orangemonster super gas
orangemonster super gas O Joined: Sep 2003 Posts: 845 Utah	You probably know this but 360's are externally balanced,heavier dampner and weights on the convertor.Since yours does'nt have the weights that is probably it.And check and see if your u-joints are centered in the yoke.

Re: vibration question 360 auto [Re: Crizila] #296730 04/24/09 08:41 PM 04/24/09 08:41 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Quote: you could try unbolting the convertor and rotating it 180 degrees and bolting it back up. Good luck with that trick. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: vibration question 360 auto [Re: orangemonster] #296731 04/24/09 08:58 PM 04/24/09 08:58 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: You probably know this but 360's are externally balanced,heavier dampner and weights on the convertor.Since yours does'nt have the weights that is probably it.And check and see if your u-joints are centered in the yoke. If he already bought the B&M flex plate for a 360, it is made to be run with a non-weighted convertor, which he has. He should be all set there. Cheap aftermarket convertors can have a balance problem - hence rotate it 180 and see if that helps. If he put the u-joint "C" clips in properly, they should be centered. Good to check though. Fastest 300

Re: vibration question 360 auto [Re: Crizila] #296732 04/24/09 10:44 PM 04/24/09 10:44 PM
Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada Magnum master
Magnum master Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada	The drive plate to torque convertor bolts/lugs have one lug offset to NOT allow mixing up their indexing. Are you sure you have the correct 360 balancer? There are 2 different ones. A LA360 and a Magnum which is 92 and up. 69 Super Bee, 93 Mustang LX, 04 Allure Super

Re: vibration question 360 auto [Re: Provan] #296733 04/24/09 10:55 PM 04/24/09 10:55 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: any ideas? Yes, has it always had that vibration or did it start recently? live every 24 hour block of time like it's your last day on earth

Re: vibration question 360 auto [Re: RapidRobert] #296734 04/25/09 08:14 AM 04/25/09 08:14 AM
Joined: Jan 2003 Posts: 421 massachusetts P Provan OP mopar
Provan OP mopar P Joined: Jan 2003 Posts: 421 massachusetts	I got the B&M plate with the notch cutout on it to run a converter with no weights. The motor is a low mileage 29K,360 with the balancer that was on it when it was pulled out ..And I cannot spin the converter because it does only bolt on 1 way..The vibration started after I changed everything,removed the 318 and trans, and put the 360 in with a new rebuilt 727. I think I can rule out u joints and wheels, as the vibration is there when sitting in park..Maybe the converter is junk. its a GER, and I guess they are out of business? 76 DODGE VAN PRO STREET 67 DODGE CORONET R/T 480 STROKER

Re: vibration question 360 auto [Re: Magnum] #296735 04/25/09 08:36 AM 04/25/09 08:36 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: The drive plate to torque convertor bolts/lugs have one lug offset to NOT allow mixing up their indexing. Are you sure you have the correct 360 balancer? There are 2 different ones. A LA360 and a Magnum which is 92 and up. HMMM - I'll have to check mine again, Thought the indexing was drive plate to crank only on external balance B&M plates. Don't understand why you would have to index a convertor to the drive plate with no external weights on the convertor? It's been a while since the 408 I've been running for the last 3 yrs is internal balanced - forget a lot at my age. Fastest 300

Re: vibration question 360 auto [Re: Provan] #296736 04/25/09 08:42 AM 04/25/09 08:42 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Maybe the converter is junk. that would be my thinking. It's a nonmagnum 360 that ran good when pulled(no vibration I'm sure)harmonic dampener wasn't changed(would be no reason to), the correct flex plate(The one for an externally bal 360 with a neutral 727 converter) was used. R&R the converter. live every 24 hour block of time like it's your last day on earth

Re: vibration question 360 auto [Re: RapidRobert] #296737 04/25/09 08:45 AM 04/25/09 08:45 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: Quote: Maybe the converter is junk. that would be my thinking. It's a nonmagnum 360 that ran good when pulled(no vibration I'm sure)harmonic dampener wasn't changed(would be no reason to), the correct flex plate(The one for an externally bal 360 with a neutral 727 converter) was used. R&R the converter. Fastest 300

Re: vibration question 360 auto [Re: Crizila] #296738 04/30/09 09:36 AM 04/30/09 09:36 AM
Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada Magnum master
Magnum master Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada	Quote: HMMM - I'll have to check mine again, Thought the indexing was drive plate to crank only on external balance B&M plates. Don't understand why you would have to index a convertor to the drive plate with no external weights on the convertor? Both the crank to plate and the plate to convetor need to be indexed because it's not actually the plate that needs to be indexed (in a factory app). It's the convertor to crank that need to be indexed. 69 Super Bee, 93 Mustang LX, 04 Allure Super

Re: vibration question 360 auto [Re: Magnum] #296739 04/30/09 10:58 AM 04/30/09 10:58 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: Quote: HMMM - I'll have to check mine again, Thought the indexing was drive plate to crank only on external balance B&M plates. Don't understand why you would have to index a convertor to the drive plate with no external weights on the convertor? Both the crank to plate and the plate to convetor need to be indexed because it's not actually the plate that needs to be indexed (in a factory app). It's the convertor to crank that need to be indexed. Checked mine - your right - sorry about that. Fastest 300

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