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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8417
Experience:  I am ASE Master Truck Certified.
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I have a 3176B and it has started vibrating and running hard.

Customer Question

I have a 3176B and it has started vibrating and running hard. Gears 3 to 4 and 5 to 6 experiences the most severe issue. Trany is okay. It has an Allison B500R and all D's checked okay and Trany fluid level okay. No check engine light no over heating
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 1 year ago.
Hi. Thanks for asking your question and requesting me! I will try and help you out.
Since the mounts have been changed. I would next suspect the vibration dampner. The tough part is there is no way to verify or troubleshoot the dampner. You just have to replace it.
Please reply back if you need more help or have more questions. I am happy to assist.
Customer: replied 1 year ago.
Where is the vibration damper
Expert:  Cat Man replied 1 year ago.
It s bolted to the front of the engine on the crankshaft.
Please reply back if you need more help or have more questions. I am happy to assist.

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