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Topic: vibration problems 64 dart (Read 305 times)
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64dartsb
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I have a 64 dodge dart and I just put a 360/904 8 3/4 combo When I get on the freeway the car starts vibrating really bad at 3000 rpm all the way to 3700 rpm and then it just goes away and I can cruise along fine but then if I dip down to like 3000 again it will start vibrating then I have to take it back up to about 4000 rpm again for the vibration to go away. I tried throwing it in neutral while it was vibrating and it didn't help it at all. When I first put the thing together the tranny was fine but I think it vibrated so much that it messed up the front pump seal on the tranny and now it leaks tranny fluid real bad. the driveshaft hasn't been balanced , the yoke sticks out of the tranny about 2 in. , the pinion angle on the rearend is like 5 degree's up I think if I remember correctly , It has a good tranny mount and there is no contact from tranny to crossmember or underbody what do you guys think would fix it? has anyone ever experienced this before?  |
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Logged
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If your dreaming of your car then it's your dream car
64 dart stock appearing, grocery getter, 360 2.02 in, 1.60 ex victor jr, aeromotive fuel system. msd dist, coil, wires, 6a, 125 shot of nitrous hedman 1 7/8 fenderwells 3 in exhaust / 904 quarter stick, reverse manual, / 8 3/4 3.91, suregrip
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CARNUT
Full Member
 Offline
Posts: 258
BigBlockDart.Com
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are you running the wright torque converter and crank balancer for a 360 they are diferent fron a 318/340
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Logged
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74 duster 318 swirl port heads 274/490 cam holley 600 with headers and a accel supper coil 333 R.W.HP
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St.Louis-Dart
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My driveshaft is to short ..yokes out 2in but no vibration...no problems after 1 year...mild cam 383 3:91 power lock..8 3/4... stock 727 (shift kit)
[attachment deleted by admin]
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bOb shingler
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are you running the wright torque converter and crank balancer for a 360 they are diferent fron a 318/340
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"bOb Built" (no matter how many times it takes)  |
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64dartsb
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yes I am positive that I am running the right torque converter it has weights on it for the 360 and the balancer is correct too.
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Logged
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If your dreaming of your car then it's your dream car
64 dart stock appearing, grocery getter, 360 2.02 in, 1.60 ex victor jr, aeromotive fuel system. msd dist, coil, wires, 6a, 125 shot of nitrous hedman 1 7/8 fenderwells 3 in exhaust / 904 quarter stick, reverse manual, / 8 3/4 3.91, suregrip
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signet
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if it was the engine out of ballance it would happen at a stand still at the rpm you mention.
it sounds like the driveshaft is bent or the wheels and rubber are out of ballance.
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kawazuki8097
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With the DS hanging out so far, that could wreck the bushing on the tailshaft.
Running the DS out of balance will wreck the pinion bushing.
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Logged
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Only two people ever died for you,Jesus Christ and the American GI.
One died for your soul the other for your freedom.
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64dartsb
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so do you think that the driveshaft being out of balance messed up the pinion bushing and lead to the front seal failure too.
I think your right about the tailshaft bushing too it drips a little from there also.....
also does anyone know some website about how to rebuild 904 trannies and I've seen books on how to rebuild 727 will that work for the 904 also or is it completely different?
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Logged
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If your dreaming of your car then it's your dream car
64 dart stock appearing, grocery getter, 360 2.02 in, 1.60 ex victor jr, aeromotive fuel system. msd dist, coil, wires, 6a, 125 shot of nitrous hedman 1 7/8 fenderwells 3 in exhaust / 904 quarter stick, reverse manual, / 8 3/4 3.91, suregrip
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CARNUT
Full Member
Offline
Posts: 258
BigBlockDart.Com
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same thing but everythings smaller
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Logged
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74 duster 318 swirl port heads 274/490 cam holley 600 with headers and a accel supper coil 333 R.W.HP
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instrument
Guest
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Man, I'm going through the same trouble. The Drive line is in the shop, so I will see in a couple of days.
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instrument
Guest
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The drive line was bent and uot of ballance...Now I have no problems other then the desire to keep my foot on the throttle...Hopefully your trouble will be as cheap!
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440Ken
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You say highway and 3000-3700 RPM. Does it vibrate at those RPM when setting still? If yes....engine if NO if may be wheel balance problems.....maybe.
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Former "God Member" with 1180 posts
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74' DART
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I had the same problem a few years back, would only vibrate at certain rpm's had a new driveshaft made balanced, still had the same problem. Usually a tire or wheel vibr. u can feel through the steering wheel , or the seat of your pants if its a rear tire. My vibration would shake the hole car, rattle the dash etc. When i changed from sb to bb it took my convertor to trans shop to have it looked at , there was a guy who knew mopars working there and he knew right away what my prob was. It was a 360 conv. not a 318. I ran my bb with the same drive shaft ,rear, tires, and never had another prob. Double check that convertor, it is poss. for them to damage front seals. J.R.
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