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Old Mar 6, 2018 | 08:13 PM
  #1  
st8yd's Avatar
st8yd
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From: central fl
Transmission trouble

Having a vibration intermittently at 1500 rpm regardless of gear, mostly when cold after several miles will generally go away and sometimes doesn't do it at all. Had tranny cooler added a while ago and seemed to help with temp., but is now getting hot without much effort when towing.
Thanks
 
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Old Mar 6, 2018 | 08:35 PM
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Mark Kovalsky
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Originally Posted by st8yd
Having a vibration intermittently at 1500 rpm regardless of gear,
Thanks
That strongly suggests that the problem is not in the transmission.
 
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Old Mar 7, 2018 | 06:24 AM
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DieselDenny
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Time to drop the rear shaft and inspect or replace ujoints if it has been a while.

Denny
 
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Old Mar 7, 2018 | 08:01 AM
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It isn't a bad idea to check the u-joints, but they are not the cause of a vibration at 1500 RPM regardless of gear. U-joints will cause vibrations at specific road speeds, not specific engine RPMs.
 
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Old Mar 7, 2018 | 02:16 PM
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HD Rider
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If the transmission started running hot when the vibration showed up, what about a torque converter issue?
 
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Old Mar 7, 2018 | 06:20 PM
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The vibration and excessive heat are not necessarily related.
The vibration will go away.
While towing the boat (12k lbs) the other day I don't recall the vibration, but the tranny got hot rather quick and no hills, it was only a 25 min trip.
I have noticed that if you stomp it, the vibration goes away before it really even accelerates?
 
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Old Mar 7, 2018 | 06:46 PM
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Outer ring on the harmonic balancer slip ? Was a similar thread in the excursion forum recently.
Does it do it in neutral/park?
 
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