My 03 makes a coughing type sound when it shifts from 2nd to 3rd? dosnt seem to be causing any problems but it is annoying none the less, i have noticed it just does it when my BDTD is set on stock mode but never does it on the tow mode or higher settings, maybe a fuel/air mix problem? i've never had a diesel do this before.
Thx

 

is it like turbo bark? kinda unusual for it to do it in stock and not in the perf modes

brett

 

It dosnt sound like it is from the turbo, i can really hear it from the exhaust?
it makes the coughing noise then a little bit of power loss then right back to normal?

 

hows your fuel filter? i work with 2 guys that have never changed theirs. they looked at me like i was crazy when i told them i do mine every 10k. ones at 60k and the others at 80k

brett

 

fuel filter only has 2000 miles on it? i change them between 10k-15k?

 

Any other idea's? i'm starting to think it's a wastegate problem!?

 

If it's what I think it is, it's actually normal on the DC. It is the wastegate- sounds weird, but not abnormal at all.

 

Would you describe it as kind of a "shucking" sound??

 

Yeah that would be it, i've noticed it only does it when i get on it hard to pass someone and then have to back off fast to slow down, hopefully it's not hurting anything it's mainly annoying me.

 

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It's normal for the DC. (You'll get used to it!)