chief_shotts
Junior Member
- Joined
- Nov 29, 2021
- Posts
- 11
- Reaction score
- 21
- Location
- beaverton, OR
- First Name
- edgar
- Truck Year
- 1986
- Truck Model
- k30
- Engine Size
- 383
I need help identifying an odd noise that occurs at highway speeds (above about 2500 rpms). I would describe it as a repetitive whirling swoosh noise that picks up as rpms increase and then decreases to nothing as rpms slow.
A bit of context: the hole for the transfer case shifter is wide open because the truck was originally 2wd converted to 4wd and i haven't gotten around to modifying the hump to fit a shifter boot. Therefore any noise from road and drivetrain is quite noticeable. I had the motor rebuilt and after installing is when i noticed this noise start. prior to the engine swap i do not recall hearing this noise.
I am at a loss for what could be possibly causing this sound. Truck drives great. Engine running strong. Transmission shifts nicely.
It may also be pertinent information to mention that when i reinstalled the motor the already steep geometry of the front driveshaft was slightly shifted causing the drive shaft u joint to make contact with the transfer case support cross member and so i have the front driveshaft temporally removed. Could this noise be related to front axel or transfer case and made worse by removing the drive shaft?
If anybody has any ideas please let me know
A bit of context: the hole for the transfer case shifter is wide open because the truck was originally 2wd converted to 4wd and i haven't gotten around to modifying the hump to fit a shifter boot. Therefore any noise from road and drivetrain is quite noticeable. I had the motor rebuilt and after installing is when i noticed this noise start. prior to the engine swap i do not recall hearing this noise.
I am at a loss for what could be possibly causing this sound. Truck drives great. Engine running strong. Transmission shifts nicely.
It may also be pertinent information to mention that when i reinstalled the motor the already steep geometry of the front driveshaft was slightly shifted causing the drive shaft u joint to make contact with the transfer case support cross member and so i have the front driveshaft temporally removed. Could this noise be related to front axel or transfer case and made worse by removing the drive shaft?
If anybody has any ideas please let me know
