Re: What went wrong? flex plate, converter, or tranny?
[Re: 71nonRT340shaker]
#1483581
08/14/13 12:09 AM
08/14/13 12:09 AM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
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Quote:
Here's the converter its fairly small in diameter compared to some I've seen may or may not be the correct one? Also the flat you can see in the pic is where the weights would be, and this motor shouldn't have any on the converter, correct? Thanks again for helping me out...
That is a after market race converter, not a stock one I think I see a washer under one of the converter mounting bolts, take it out and leave it out It looks like your working on a SB motor, yes? Next thing is to figure out if the motor was a externally balanced cast iron crankshaft motor originally or not What crankshaft dampener is on it now? Post a picture of the front of the motor with the pulleys and dampener so we can see them from the front
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: What went wrong? flex plate, converter, or tranny?
[Re: Cab_Burge]
#1483585
08/14/13 06:54 AM
08/14/13 06:54 AM
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Joined: Jan 2003
Posts: 926 MICHIGAN
BB65Barracuda
super stock
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super stock
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Posts: 926
MICHIGAN
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I think I see a washer under one of the converter mounting bolts, take it out and leave it out! Cabs right, looks like wrong bolts and the washers aren't helping. That's obviously what is tearing up the inspection plate.
1957 Power wagon wm300 original 10.000 mile truck, 1964 dodge Polara Convertible numbers matching
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Re: What went wrong? flex plate, converter, or tranny?
[Re: Cab_Burge]
#1483586
08/14/13 08:24 AM
08/14/13 08:24 AM
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Joined: Jul 2013
Posts: 116 Pa
71nonRT340shaker
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Quote:
It looks like your working on a SB motor, yes? Next thing is to figure out if the motor was a externally balanced cast iron crankshaft motor originally or not What crankshaft dampener is on it now? Post a picture of the front of the motor with the pulleys and dampener so we can see them from the front
Cab this is from earlier in my post I can get a pic this evening if needed but:
The motor is a 9-9-68 casting 340 with the early (thinner) dampener which I already swapped with another one I had of a 70 motor, the converter doesn't have any weights welded onto the flat spots on the motor side. I thought this was all correct maybe I'm wrong? It's a 727, and it vibrates in park, neutral, and all forward/reverse gears. Timing is set at 28 or 30 flat with no vacuum advance, electronic conversion Evan's harness and MP dist, orange box.
Thanks again for all of the great feedback, I'm happy to hear the washers and what not don't look ok. I'm well on my way to getting the tranny out, and it should be out by the weekend. It's not the ideal setup by any means the car is on jack stands and I'm laying on the garage floor. Makes sense it's not the stock converter the car doesn't engage like a newer daily driver when you put it in drive, and the neighbors love when I pull it in the garage at 10pm.
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Re: What went wrong? flex plate, converter, or tranny?
[Re: poboyengineering]
#1483588
08/14/13 09:40 AM
08/14/13 09:40 AM
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Joined: Jul 2013
Posts: 116 Pa
71nonRT340shaker
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the installer just pulled the ears down with the bolts, distorting the flexplate? just my
I have my fingers crossed that's exactly what went wrong. With any luck a new plate, and 10 bolts and I'm good to go.
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Re: What went wrong? flex plate, converter, or tranny?
[Re: 71nonRT340shaker]
#1483589
08/14/13 09:51 AM
08/14/13 09:51 AM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
the installer just pulled the ears down with the bolts, distorting the flexplate? just my
I have my fingers crossed that's exactly what went wrong. With any luck a new plate, and 10 bolts and I'm good to go.
How would a distorted flex plate cause a vibration?
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Re: What went wrong? flex plate, converter, or tranny?
[Re: Challenger 1]
#1483591
08/14/13 10:24 AM
08/14/13 10:24 AM
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Joined: Jul 2013
Posts: 116 Pa
71nonRT340shaker
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Quote:
How would a distorted fex plate cause a vibration?
If I'm understanding this correctly:
If the crank bolts are hitting the converter and they tightened the first flex plate bolt all the way initially, you would have to draw the plate to the converter with other 3 bolts (after the first one is tight the plate would be putting force on the heads of the other 3 bolts, or pulling away from the converter) which would bend the ears and create a spring like tension VS the plate laying flat against the converter as it should be and the bolts simply holding the 2 together.
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