Pump Growl And Whooing

cwendel4 · January 31, 2010

okay, new member old reformed hacker.

I have two issues.

First, 6 months into a rebuilt 4l60E in my 2000 1500 2wd sierra and I have a WuuuuOOOOOOOOOOOING sound when accelerating in first gear. Not a whine or a whir, but a wuuuuuooooooo. Any ideas? The trans was rebuilt by a shop a friend with a long time shop uses. The rebuild guy was supported by all my older friends, some farmers. I truct their choices.

2nd, PS pump.

On cold start up, I get a growl. It happens when the temperature dips below thirty and I and origionally had written it off to a starter solenoid sticking cold. Now does it with a whine from under the hood. Last night I sucked the fluid from the reservoir with a vacuum pump and replaced it. It changed the tone of the noise and returned it to a chirp/whine. I am going to try changing the fluid again tomorrow when the temperatures are above freezing. I have checked under the hood with the old screwdriver and found it louder by the idler pulley but the growl sound like a bad P/S pump.

Before I hear about a motor mount, the motor does not move when brakes on and in drive and the throttle blipped.

The sound ounder the hood quiets after a short time of running. I have gotten a new idler pulley and will change that tomorrow as well. The Goodyear gator belt on the motor is less than a year old and does not seem to have any real wear. I have yet to check the damper pulley as I do Have the dreaded LS 5.3 witht he piston slap issue. I am also using Royal purple in the motor.

Any help would be great. Thanks