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I have a 2005 mack granite cv 713 dump truck and every time…

Customer Question
I have a 2005...

I have a 2005 mack granite cv 713 dump truck and every time the radiator fan kicks on it make a loud humming sound and the transmission seems to struggle for power when the radiator fan kicks off everything goes back to normal

Mechanic's Assistant: Have you heard this particular sound before?

No

Mechanic's Assistant: What is the model of your '05 transmissions?

Allison

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

No i don't fix it myself but the mechanic can't figure the problem

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

How to check hydraulic oil level

Submitted: 5 years ago.Category: Medium and Heavy Trucks
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Answered in 2 hours by:
6/13/2017
Technician: Daniel Wilson,
 replied 5 years ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 14,852
Experience: Owner at DJ Wilson
Verified

Hi my name is***** will be glad to try to help. Is the noise coming from the engine bay or transmission area? If there is concern of an internal transmission issue you should find metal/debris and dark discolored oil in the transmission and filter. Also the transmission should be scanned for fault codes. If okay check the fan, waterpump pulleys and other pulley bearings for any play or roughness that could be causing an issue. Let me know the results and if we need to dig deeper into this.

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Daniel Wilson
Daniel Wilson
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 14,852
14,852 Satisfied Customers
Experience: Owner at DJ Wilson

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