Go Back   DodgeForum.com > Dodge SUVs > Dodge Durango > 1st Gen Durango
Sign in using an external account
Register Forgot Password?


1st Gen Durango 1998 - 2003 Durango's

Still can't diagnose vibration

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 10-13-2013, 01:34 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default Still can't diagnose vibration

So my rig has had a vibration since I got it, and I still haven't been able to track it down. Here are the conditions. At first it was a narrow rpm band, about 2700-3000 rpm where it would happen, cruising. It sucks, because that is right where I am at when towing with the OD off down the freeway. It runs very smooth up until this point. When it happens, it's hard to tell where it's coming from specifically. It just rattles the whole truck really. I have checked all my u joints, and while I would like to replace them, I don't think they are the cause because it is rpm related, not speed. It seems worse under load, so if I put it in manual first and drive at that rpm, it's not as bad.

Does anybody have any ideas? The only thing I can think of is potential bad motor mounts, but I don't really know how to check that without replacement. The rpm band that it vibrates seems to have gotten larger, starting at maybe 2500 rpm and not really ever going away at high rpm like it used to. It seems to run right otherwise and has decent power, expect it also has a slight miss (I think it's a miss) at idle but it smooths out as soon as I start moving. I don't think it's related and am not worried about that one really, unless it turns out they are related.

If it helps, I know that this truck originally had a 5.9 and someone swapped in a 5.2. I have no clue why, and didn't know it when I bought it. They didn't don't a very good job, so it could be something uncommon that you wouldn't think of as a wear item or anything, or maybe the motor just wasn't aligned correctly.

Any ideas would be great. I want to keep it, but it makes me really uncomfortable towing with the vibration, and I seem to be towing lot with it and don't want something breaking on me
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
Reply With Quote
  #2  
Old 10-13-2013, 01:37 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

Since I am on my phone, it doesn't show what my truck is so just to make sure, 2000 Durango AWD 5.2/46re(since it originally had the 5.9)
Reply With Quote
  #3  
Old 10-13-2013, 02:21 PM
winkie74's Avatar
winkie74 winkie74 is offline
Professional
 
Join Date: Jan 2010
Posts: 193
Default

Is the vibration present at that rmp when you are sitting still in neutral? If not it's drivetrain related.
Reply With Quote
  #4  
Old 10-13-2013, 02:43 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

I will check again to be accurate. Last time I checked I thought I could feel it, but it was hardly noticeable, to the point i wasn't sure if I was imagining it or not. I assumed because there was no load on the motor. Hopefully it will be more apparent since it's gotten worse
Reply With Quote
  #5  
Old 10-13-2013, 04:29 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

It's definitely there at idle. It's more audible, with less vibration felt through the truck, but it's there right around the same rpm band
Reply With Quote
  #6  
Old 10-13-2013, 05:15 PM
winkie74's Avatar
winkie74 winkie74 is offline
Professional
 
Join Date: Jan 2010
Posts: 193
Default

It could be motor mounts, or you may have even lost a weight on your flywheel. Also check your balancer, if the balancer looses its ability to absorb the torsional vibrations created by combustion forces you could be picking up pieces of your chranshaft off the ground.
Reply With Quote
  #7  
Old 10-13-2013, 05:22 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

Hope I don't sound like an idiot, how done check my balancer, just visually or is there a test?
Reply With Quote
  #8  
Old 10-13-2013, 05:24 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

Is the 5.2 external or is that the 5.9
Reply With Quote
  #9  
Old 10-13-2013, 07:50 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

I have recently discovered that the flexplate/torque converter (still haven't confirmed which one) is weighted on the 360 and not on the 318. I highly doubt the person who swapped motors realized this, and it could very well be my problem. My 5.2 is bolted to the wrong flex plate is what I'm thinking
Reply With Quote
  #10  
Old 10-14-2013, 02:14 AM
RockGuardedDak's Avatar
RockGuardedDak RockGuardedDak is offline
All Star
 
Join Date: Feb 2009
Vehicle: 1993 Dakota 3.9L 2WD
Location: Winnipeg, Manitoba, Canada
Posts: 841
smokeweed69 smokeweed210 AbsorbedComa
Send a message via MSN to RockGuardedDak
Default

Quote:
Originally Posted by AppelH View Post
Is the 5.2 external or is that the 5.9
The 5.9 is externally balanced where as the 5.2 is internally balanced. I can't remember how they balanced the 5.9 exactly, but I'm pretty sure it was balanced by the torque converter. If so, the 46re torque converter being installed will be your problem. If not, it may just be a matter or changing the flywheel? I can't remember what they used to balance the 5.9 so couldn't tell you for sure. If the vibration is rpm related, I can almost guarantee that the engine balance is your problem.

If you still wish to check the motor mounts tho, you can kinda check them this way by yourself. Lift the hood, start the truck, put it in drive, hold the brake hard and rev the motor, while revving it, watch to see how much the motor jumps. If you have a friend to help, get them to watch to see if the mounts jump to the safety catch. If they jump to the safety catch, they need replacing. You could also inspect the rubber for excessive cracking
__________________
My Daily Driver: 1993 Dakota LE 3.9L v6 Magnum, 42-RH 2WD (180 Degree Thermostat, V8 Throttle Body, Hughes Plenum Fix) My Project: 1981 Chevrolet 1500 5.0L (305ci) v8, Auto, 2WD Long Box Old Lady's Truck 2002 Durango SLT PLUS 4.7L Magnum, 545-RFE 4x4
Reply With Quote
  #11  
Old 10-14-2013, 06:49 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

I may have found out that I don't have the PCM for the 5.2. If someone could decode these numbers that would be great.

P56040 407AD-I have all the numbers on the sticker but I am pretty sure this is the one that is needed.
On the block it says: 53006714 31824
Reply With Quote
  #12  
Old 10-15-2013, 09:03 PM
volaredon volaredon is offline
Captain
 
Join Date: Apr 2010
Posts: 509
Default

by 2000 they weighted the flexplate instead of the torque converter. 46 RE used same torque converter with both engines. older ones (pre 96 I think was the change) they both used the same flexplate and different converters between those engines.
Reply With Quote
  #13  
Old 10-15-2013, 09:04 PM
volaredon volaredon is offline
Captain
 
Join Date: Apr 2010
Posts: 509
Default

the PCM don't actually know what engine its running,,, that's NOT your issue
Reply With Quote
  #14  
Old 10-15-2013, 09:13 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

OK... So both the points you just made are consistent with comments made when I asked the same question on the ram forum, which is good. Do you have any ideas? Do you think the weighted flex plate might be the problem?
Reply With Quote
  #15  
Old 10-16-2013, 07:27 PM
vako vako is offline
Professional
 
Join Date: Mar 2012
Posts: 125
Default

2 things, if vibration is gone while standing still, i would say wheel bearing, if vibration still exists when ur parked i would say spark plugs
__________________


Dodge Durango, powaaaaaaaaaaaa!!!
Reply With Quote
  #16  
Old 10-16-2013, 07:35 PM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

It is present, but less severe while stopped. The guys on the ram boards have helped me determine that I have a weighted flex plate that the 5.2 should not have.
Reply With Quote
  #17  
Old 10-17-2013, 12:12 AM
adukart adukart is offline
Record Breaker
 
Join Date: Jun 2011
Vehicle: 1998 Durango SLT 5.9L
Location: Bismarck, ND
Posts: 1,629
Default

Well what did the 5.2l come out of? If it was from a ram then it was in front of a 46re already. If it was from a dak/durango it was in front of a 44re. Its sounds like a balancing issue. The flex plate should not have been changed out, the 46re should have bolted up with out an issue.
__________________
'98 durango 4x4 5.9l, 3.92 diff, 46re 4speed, nv242hd transfercase, home brew cai, sct tuned by hemifever, kegger mod, 2" t/s lift, custom homemade bumper, rockin goodyear duratracs. When talking about towing - There no replacement for displacement.
Reply With Quote
  #18  
Old 10-17-2013, 12:37 AM
AppelH AppelH is offline
Captain
 
Join Date: Feb 2013
Vehicle: 2000 Durango 4x4 5.2
Location: Central Washington
Posts: 532
Default

Don't know what the motor came out of. They could have reused the original flex plate, which is what I think happened. They don't know they switched from a 360 to a 318, I have come to the conclusion that they put a 318 in thinking that was the original motor size. I found the weight in question, I pulled the inspection cover off and I took pictures of it. They are all on the thread I made in the 2nd Gen ram forums, I don't know how to link to it on my phone.
Reply With Quote
Old 10-17-2013, 12:37 AM
 
 
 
Reply




Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 08:29 AM.

Internet Brands, Inc.


Contact Details & Emails