A1/G2 whine-howl after overhaul

[peteua636]

recently overhauled an A1/G2 drive gearcase.All new bearings & seals. I noticed today that when I put my drive into gear or in neutral it makes a slight whine/howl type noise. It will increase in tone as the rpm increases and then seems to disappear after 11oo rpm or so. Or at least I can't hear it over the engine. I do know that a .005 shim was added to the forward gear as the backlash was on the high end of the spec. After the shim it was at the lower end of the spec .019" dry. Could this cause the whine? Nothing was done to the upper and the noise was not there before the overhaul...any ideas?

 

[Bondo]

Re: A1/G2 whine-howl after overhaul

Could this cause the whine?

Ayuh,.......... Sure Could,........ <br /><br />The Gears are now Contacting/Wearing in a Different Place,...........

 

[peteua636]

Re: A1/G2 whine-howl after overhaul

thanks....so should I replace the gears or go back to the original shim config?<br /><br />Thanks again

 

[Wellcraft 89]

Re: A1/G2 whine-howl after overhaul

9 Times out of 10 if your replacing seals and bearings,because the bearings are worn the gears are worn also.This is not a rebuild ,it is a ticking bomb.the whine will get worse over time as well as now the gears are wearing in different spots causing metalic particles to float around inside your new bearings.<br />If you do nothing ,at least change the fluid more often in the drive to remove particles.<br />you could reshim to orignal,but your already on the high end of backlash.<br />Rich

 

[peteua636]

Re: A1/G2 whine-howl after overhaul

What end of the backlash range is the quietest? or is there a difference?<br /><br />Thanks<br />Pete

 

[Laddies]

Re: A1/G2 whine-howl after overhaul

Ussally gear whine is caused by not enough backlash

 

[peteua636]

Re: A1/G2 whine-howl after overhaul

Would you think that the gears are scrap at this point?<br />Unit only has 180 total run time on it. 60 hours on the overhaul.<br />PN