B
Britrest
Guest
I had to reply to this one as it happened to us - the 96 should have a cross
drilled gear but I have seen 98's without
Anyway the input gear will only solve the clunking - worn shaft splines, but
the whine are the gears not meshing correctly
The 230 is a swine to shim up = we put a set of Ashcroft high ratio gears in
a 300 not so long ago and the output shaft (to the prop shafts) has so much
play it was un true
We did the maths and had to fit a 0.60 inch shim to take up the play
When you have 2 x taper roller bearings on a shaft and very loose, then
there is more play on the shaft, thus a lower contact area for the gear
teeth - as the teeth are further apart and not correctly meshed hence the
whine
Now we didn't have all the fancy tools you need to put the shim beneath the
bearing seat, so we pulled the bearing off the shaft itself, and had a shim
machined to suit - put it all back together and it was lovely!
Not rocket science, but a right prat about - even on the bench!
Mike
Britannica Restorations Ltd
Canada
"Scot Kight" <me@cox.net> wrote in message
news:2ynsd.1257$2R3.337@lakeread02...
> Ok since I am sure everyone here is waiting with baited breath. The steve
> parker mainshaft oil feeder did NOT fix the gear whine. Absolutely no
> change whatsoever. Neither did repacking the mainshaft's bearings in
> grease. Be aware, I am not disparaging SP for their unit, as it still
> supplies oil to the shaft and is still "a good thing" for those of us
> without the crossdrilled mainshafts. It just does not do anything to
remove
> any noise in my vehicle.
>
> If anyone else has any advice, please let me know. The whine is driving
me
> nuts in the 30mph range.
>
> BTW: The mainshaft bearing keeper was "stuck" on in my case because the
> service people working on the truck before I purchased must have taken the
> PTO cover off for an inspection, and decided some RTV was just as good as
> the proper gasket. Once I broke it free from that, it came off.
>
> Scot
>
>
> "Scot Kight" <me@cox.net> wrote in message
> news:ZqUod.3929$SA.217@lakeread02...
> >I believe I have a classic case of transmission whine. No sound at idle,
> >nothing more than I would expect on a D-R clunk, no driveline lash, but
> >when under power and driving a whining sound can be heard from the
> >transmission tunnel/passenger area. The whining is directly related to
> >vehicle speed and not how hard I press the throttle or rpm. Whine is
> >elimintated when the throttle is fully lifted.
> >
> > It increases in volume 30-50mph then is steady to about 60 where it
drops
> > off again. Unfortunately it can be quite loud, and is right at a
grating
> > frequency for me.
> >
> > Tcase has Mobile 1 75w90 gear oil in filled to the proper level.
> >
> > I was considering trying 75w140 to see if that improved it, but want
> > confirmation it wont hurt anything first. I also will probably be
> > ordering the mainshaft oil feeder built by Steve Parker
> > http://www.steve-parker.co.uk/designed.htm some time in the near future,
> > if anyone knows a USA based dealer, please post who in a reply. I am
sure
> > plenty of people want to know this.
> >
> > One site suggested filling the tcase 1/2 quart above full to reduce the
> > whine. The only way I could think of doing this is to remove the pto
> > cover and somehow get more in that way. Possibly taking out the output
> > shaft to do it, but I haven't popped the pto shaft yet so I have no idea
> > what it looks behind there or if that is even a possibility.
> >
> >
> > If anyone has any other suggestions, please let me know.
> >
> > Scot
> >
>
>
drilled gear but I have seen 98's without
Anyway the input gear will only solve the clunking - worn shaft splines, but
the whine are the gears not meshing correctly
The 230 is a swine to shim up = we put a set of Ashcroft high ratio gears in
a 300 not so long ago and the output shaft (to the prop shafts) has so much
play it was un true
We did the maths and had to fit a 0.60 inch shim to take up the play
When you have 2 x taper roller bearings on a shaft and very loose, then
there is more play on the shaft, thus a lower contact area for the gear
teeth - as the teeth are further apart and not correctly meshed hence the
whine
Now we didn't have all the fancy tools you need to put the shim beneath the
bearing seat, so we pulled the bearing off the shaft itself, and had a shim
machined to suit - put it all back together and it was lovely!
Not rocket science, but a right prat about - even on the bench!
Mike
Britannica Restorations Ltd
Canada
"Scot Kight" <me@cox.net> wrote in message
news:2ynsd.1257$2R3.337@lakeread02...
> Ok since I am sure everyone here is waiting with baited breath. The steve
> parker mainshaft oil feeder did NOT fix the gear whine. Absolutely no
> change whatsoever. Neither did repacking the mainshaft's bearings in
> grease. Be aware, I am not disparaging SP for their unit, as it still
> supplies oil to the shaft and is still "a good thing" for those of us
> without the crossdrilled mainshafts. It just does not do anything to
remove
> any noise in my vehicle.
>
> If anyone else has any advice, please let me know. The whine is driving
me
> nuts in the 30mph range.
>
> BTW: The mainshaft bearing keeper was "stuck" on in my case because the
> service people working on the truck before I purchased must have taken the
> PTO cover off for an inspection, and decided some RTV was just as good as
> the proper gasket. Once I broke it free from that, it came off.
>
> Scot
>
>
> "Scot Kight" <me@cox.net> wrote in message
> news:ZqUod.3929$SA.217@lakeread02...
> >I believe I have a classic case of transmission whine. No sound at idle,
> >nothing more than I would expect on a D-R clunk, no driveline lash, but
> >when under power and driving a whining sound can be heard from the
> >transmission tunnel/passenger area. The whining is directly related to
> >vehicle speed and not how hard I press the throttle or rpm. Whine is
> >elimintated when the throttle is fully lifted.
> >
> > It increases in volume 30-50mph then is steady to about 60 where it
drops
> > off again. Unfortunately it can be quite loud, and is right at a
grating
> > frequency for me.
> >
> > Tcase has Mobile 1 75w90 gear oil in filled to the proper level.
> >
> > I was considering trying 75w140 to see if that improved it, but want
> > confirmation it wont hurt anything first. I also will probably be
> > ordering the mainshaft oil feeder built by Steve Parker
> > http://www.steve-parker.co.uk/designed.htm some time in the near future,
> > if anyone knows a USA based dealer, please post who in a reply. I am
sure
> > plenty of people want to know this.
> >
> > One site suggested filling the tcase 1/2 quart above full to reduce the
> > whine. The only way I could think of doing this is to remove the pto
> > cover and somehow get more in that way. Possibly taking out the output
> > shaft to do it, but I haven't popped the pto shaft yet so I have no idea
> > what it looks behind there or if that is even a possibility.
> >
> >
> > If anyone has any other suggestions, please let me know.
> >
> > Scot
> >
>
>