The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (
-   Suspension (
-   -   noises while driving (

triophan 01-17-2011 01:02 AM

noises while driving
I know this is the worst way to diagnose these kinds of things... but I figured I'd throw it out there.

I have a whirring "wow-wow-wow" noise that comes at driving at highway speeds. Its not consistant with engine RPM. And it changes depending on the gear (I THINK i have a TH350).

Also, at idle, it sounds like something is shaking and hitting the trans tunnel. Maybe unbalanced driveshaft?

In the next 2 weeks I will be completely rebuilding the suspension. Mild drop, all new bushings, alignment, possibly new tires, bearings, trying to make sure all moving parts are up to snuff seeing as how this is my daily for now.

Thanks for the input.

BossHogg69 01-17-2011 01:20 AM

Re: noises while driving
If it's vibrating and banging that bad, it may be bent, not just out of balance. but if it's doing it at idle (with the driveshaft not turning) it's probably something in your transmission. I'm just up the road from you in Sherwood, if you need some help, shoot me a PM. I'm off work until Tuesday.

triophan 01-17-2011 01:27 AM

Re: noises while driving
Sweet... and just now, as I was under it, (still inspecting, seeing if I see any thing new/noticeable) I have a square pan tranny, which I think means I have a 700r4...

triophan 01-17-2011 02:18 AM

Re: noises while driving
AAAAAnd I dont think the crossmember was moved back when it was swapped... could be the tranny thumping the tunnel? Anyone?

dznucks 01-17-2011 08:03 AM

Re: noises while driving

How close is the tranny to the crossmember? the tranny isnt going to move hardly at all while driving....if it bolted down properly.

triophan 01-17-2011 12:08 PM

Re: noises while driving
I'll see if I can get some pics today. Its rough not knowing the history. What's been swapped, when, how, etc...

All times are GMT -4. The time now is 02:14 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2013