Question on Speedometer Reduction Gear

[corey]

Hello all, I'm wondering for those that have experience with the speedo reduction gears... is it normal that they would bind up while turning the
little input shift by hand? After installing on the tranny, I got nothing on the speedo. I take the gears out and hook the cable back up directly to
the trans and speedo comes back. When turning the input shaft by hand, the output spins as expected. However if I shake it slightly or lean it just
the right way, it binds up and I am unable to turn the input shaft. Seems like a recipe for disaster with plastic speedo/governor gear. Main reason im
coming to this group is that I tend to overanalyze things but with this particular item there is potential to damage other components so im not really
comfortable putting it back on.
--
Corey P /

Hilliard, OH /

1974 Glacier 26'

ION Wheels

 

[lw8000]

You are correct in that it should be a concern. How do I know this? I had this very thing happen to me. The reducer seemed OK but would bind just
like you said when holding it differently. Eventually, it stripped the plastic governor gear and we were stuck in 1st gear until we could get the
gear replaced. Threw that reducer in the trash and the replacement did not have this issue.
--
Chris S. -
77 Kingsley, 3.70 FD, mostly OEM -
S.E. Michigan

 

[JHeslinga]

CORY

YES THAT IS A PROBLEM! Disconnect it or remove it quick until you can fix the problem ( possible repair below) .
my Reducer for a 3.70 final drive bound up and Broke the Governor gear so I too had only First gear. On the road traveling of course. I have
Thorley Headers too and they needed removing to access the governor. Maybe that would have been bad enough But the BROKEN Nylon Gear was A definite
Devil to remove the broken bits before I could even replace it.Its very deep in there and its plastic so Magnets are useless, and the broken bits
won't let a new one in place. Somehow I removed the spare gear i bought and usually had in the coach, and of course you can't get it anywhere.
Many-many thanks to a couple of Gracious "Black listers" on Vancouver Island we Resolved this Very Irritating Problem.

Over the winter I took apart the gear housing and noticed that on the "step gear, One tooth perfectly lines up on both sizes, when the drive gear
slips over and engages both. As soon as that happens the Drive gear locks up as soon as it tries to continue to the next ( unaligned) tooth). Yhis
happens when there is some wear in input shaft. I Took the housing and reassembled it such that the step gear was to the side rather that between the
drive and driven gear. This keeps the two gears from climbing each other. I also created a shim or space between the drive and driven gear so they
stayed in in contact with the housing and mot interfere with the Step gear.

--
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta