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Wierd noise.

834 views 2 replies 3 participants last post by  Dovepower 
#1 ·
This noise sounds like the engine is dieseling or something, but I really dont know if it is the engine or the transmission. It happens when the truck needs to kick down a gear but hangs a bit when I press the gas. At first I thought I had some bad gas so I went and put a full tank of 93 octane in it. The noise is still there. It gets worse the longer the tranmission dosnt kick down a gear, but when it kicks down and the RPMS kick up it goes away. Any help would be great thanks.
 
#3 ·
I agree it sounds like detonation but I would recommend finding the cause as opposed to putting a band-aid on it. Detonation can blow your engine up. You say the tranny isn't down shifting like normal? You may have a timing prob, a vacuum leak, or a tranny vacuum leak/solenoid prob.
 
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