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1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

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  #1  
Old 08-02-2010, 06:49 AM
Diesel Fan

   

Default Truck Shaking Real Bad

so i got the overdrive solenoid fixed put new tires on it and new transmission mounts and i still have this vehicle shake from 40mph up. its really bad between 40-55mph then tapers off but you can still feel it....thought it was tires being in bad shape so i replaced them, still the same problem, thought it may be in the powertrain so i found the tranny mounts squshed and mushy rubber, replaced and still have same shake. dont know which route to go, read about driveshafts being out of balance but how likely is that? shocks shot and so im getting leaf spring bounce? leaf spring bushings? motor mounts? bent axle? balljoints? bearings? dont know if any body else has had a problem like this or not i just dont want to throw parts at it and sink a lot of money in it. read some other threads similar but not really describe what going on with mine. it is 4 wheel drive
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  #2  
Old 08-02-2010, 08:09 AM
NadirPoint's Avatar
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Block up all 4 corners and have somebody run it up while you crawl around underneath looking and listening.
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  #3  
Old 08-02-2010, 09:02 AM
Budgreen's Avatar
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in the front? how did you install the rims?

you have to use 2 tapered lugnuts to center the rim then install the remaining lugnuts, then pull off the tapered ones.

Budgreen's Sig:.



2006 chevy duramax 2500 (stock, just got it)
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  #4  
Old 08-02-2010, 01:03 PM
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I'll have to take a lood at therim situation, the tire shop might not of done all that, but the rims are aftermarket 17" pacers
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  #5  
Old 08-02-2010, 02:34 PM
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That just night be the issue, check what kind of lug nuts they used, if they are conical that's not the issue.
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  #6  
Old 08-04-2010, 02:22 AM
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ok, so i checked it out and the wheels fit snug with the lug pattern so that is correct, all lugs are conical. Took all wheels off, and retorqued using proper torque sequence. Still shaking haha. guess i will start with the cheapest parts and work my way foreward, like leaf spring bushings. Tell me what you guys think about this....if the shocks are wore slap out in the rear, would that cause is to shake? its almost like a side to side shake and you can feel it coming on and it starts to get harder and harder almost like everytime it bobs back it springs it to the other side and each time it slings harder and harder....am I thinking right or am i completely wrong. Havent pulled the shocks off yet to see.
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  #7  
Old 08-04-2010, 08:04 AM
tltruckparts's Avatar
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check your kingpin bushings or balljoints

tltruckparts's Sig:1995 Chevy K2500, 1993 Cummins P Pumped 12 valve Turbo Diesel IC, Getrag 5 speed w/ southbend clutch, NP205 Transfercase, SAS w/ GM Dana 60 front. custom fabbed coil suspension, AAM 11.5 rear, BFG MT 35's. SDX 5x14 injectors, PhatShaft 62, airdog II 165, Autometer EGT, Boost, & Fuel Pressure, hydraulic steering. and a few moore goodies
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  #8  
Old 08-04-2010, 08:43 AM
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Originally Posted by snakebite2004 View Post
its almost like a side to side shake and you can feel it coming on and it starts to get harder and harder almost like everytime it bobs back it springs it to the other side and each time it slings harder and harder....
You have a case of Death Wobble coming on.

Is it 2WD or 4WD?
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  #9  
Old 08-04-2010, 01:29 PM
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king pin bushings? what exactly and where are those located? i'll check the balljoints. it is a 4wd. this is what i was afraid of...the dreaded death wobble i have read about haha
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  #10  
Old 08-04-2010, 05:04 PM
regor's Avatar
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My shocks are completely worn out on mine and i don't have that issue, if the wobble is in the back maybe a universal joint? If its in the front, death wobble new steering stabilizer should fix it and shocks

regor's Sig:92 ex cab, 3200 spring, denny t pin, couple of turns on the fuel screw, 02 dodge seats, K&N filter, 2nd gen turbo, 4" turbo back exhaust, push button start
83 Vw rabbit 5 speed diesel, pump turned up, file fitted rings, timing bumped and 50 mpg

Last edited by regor; 08-04-2010 at 05:07 PM..
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