Problem:
When cruising down the road approaching 1500 rpms in any gear you start to hear a faint howling sound and maybe even a buzzing like vibration in the floor and gas pedal. As rpms increase to 2000 it gets worse ( louder ). Once up to 2000ish rpms it fades maybe just a little but still very noticeable. This only happens when under load/throttle pedal down. If I get up to speed and cruise somewhere in the 1500-2000 rpm range and let off the throttle and coast the howling/buzzing goes away completely. I CAN recreate this at any speed.
I thought maybe it was the down pipe rubbing the firewall again but I dont think this is the case anymore after looking around at it again today. Unless there is significant movement while motor is under load and pushes it into it or the transmission or something. There is some space between the pipe and surround equipment but not very much at all.
Notable things:
Transmission was rebuilt 2.5k miles ago at reputable shop by previous owner so I don't know if this is a new thing or not.
EGBPV is still in place but no leaks and works as it should when cold
It runs great and will run with this but it is irritating after awhile
When cruising down the road approaching 1500 rpms in any gear you start to hear a faint howling sound and maybe even a buzzing like vibration in the floor and gas pedal. As rpms increase to 2000 it gets worse ( louder ). Once up to 2000ish rpms it fades maybe just a little but still very noticeable. This only happens when under load/throttle pedal down. If I get up to speed and cruise somewhere in the 1500-2000 rpm range and let off the throttle and coast the howling/buzzing goes away completely. I CAN recreate this at any speed.
I thought maybe it was the down pipe rubbing the firewall again but I dont think this is the case anymore after looking around at it again today. Unless there is significant movement while motor is under load and pushes it into it or the transmission or something. There is some space between the pipe and surround equipment but not very much at all.
Notable things:
Transmission was rebuilt 2.5k miles ago at reputable shop by previous owner so I don't know if this is a new thing or not.
EGBPV is still in place but no leaks and works as it should when cold
It runs great and will run with this but it is irritating after awhile