[grandpa truck]

Can't seem to figure out where a chirp noise is coming from underneath the truck. I noticed it chirps sometimes while shifting and sometimes just on the open road. Sounds like a belt or something? But sounds like it is coming from around the transmission.
If anyone has any suggestions I would like to here. The dealer didnt find anything either.

Thanks
Chuck

 

[Mackin]

Chuck

You should fill in a Sig with your truck specs, Sounds like a possible serpentine idler pulley problem but need more 'truck' information.

 

[specialagentPK]

U joints possibly??

 

[xcman]

I get a chirp when my AC compressor cycles on and off.

 

[udflyer98]

I was going to suggest u-joint as well since I've had the same issue on my kiddie truck. If you have an extended or crew cab, then the carrier bearing may be a possibility.