Drivetrain Driveline Noise

[Fetch]

Hey guys, Daniel here

I have an issue with my driveline sounding like a bus, or it has straight cut gears. Its a high pitch wine. The trans is stock as far as I kno. Has Upgraded clutch, cable, short shifter, etc. when I let off the throttle it wines down then goes away. If I keep a constint throttle, it stays. Also when I accelerate. But it sounds exactlly like a school bus and how there driveline sounds when your rideing. Any suggestions or ideas?

 

[GreenStang302]

Does it sound like it is coming from the rear of the car? If the rear end gears have been changed and not set correctly, they can make a whining noise.

 

[notch351]

could be something in the trans. does it do it in every gear. under load in neutral exc...

 

[Killa]

I have same noise in the rear, mostly on first gear ( automatic ) or low speed like under 15mph. at high speed or after second gear ( automatic ) no noise. Im thinking because im using thick gear oil 75w140 mobil 1. in a month or 2 imma change it back to regular 80w90 valvoline durablend.

 

[revhead347]

Usually that's a rear end noise. Also could be the bearing on the leigh shaft in the transmission is a little worn giving you slack in the leigh shaft.

Kurt

 

[Fetch]

It sounds more like from the trans. The rear does a grind like sound when I go around curves. It has 4:10 gears and a full posi. The noise is a high pitch, and only does it when I get up to a certain speed like past 15mph and does it when I accelerate(gets louder the higher thr rpms), when I cruze at a constant speed, and when I let off the throttle it whines down a few seconds then goes away. They only thing I can compare it to is a racecar(lemans) with straight cut gears in the tranny, but not as loud. There is a video on youtube. Type in racecar with straightcut gears. Thanks so far for all the info and help. Im trying to be as discriptive as possible.

 

[notch351]

what year is your car does it have an electric fan or clutch fan mounted to waterpump. I have had the fan clutch lock up on one of my foxes and it sounds like a bus literally as you drive it and it is always hard to tell where the sound comes from.

 

[Fetch]

Sorry, its a 94 gt 5 speed, electric fans. Ok I got it on the lift today and checked it out a little. The fluid in the trans and rear are good and clean. The driveshaft has marks/ cuts were something has been rubbing it and made grooves. But nothing has been rubbing, its like it came from another car. But that might cause a vibration not a whine right?

 

[revhead347]

That absolutely might cause a vibration or whine. You can put new U-joints in the stock driveshaft and have it rebalanced, or just get an aluminum one.

Kurt