Thanks to Bob Lang, Randall and Dean Tetterton for their input. I got home
tonight and finished tearing the gearbox down. What I though looked like a
nice set of gears had 2 problems. The bronze top hat bushing was broken
(answering the question why it didn't want to shift down) and the forward
countershaft busing was galling the countershaft. This is particularly
"galling" to me since I spent time making sure the bearing all rolled,
cleaning out the rollers and WD40 them until they rolled freely.
The advice I got included the fact the TRF bronze top hats are too tight and
need to be opened up. Mine was from TRF. Other advice was that the mainshaft
gets galled from metal particles rubbing between the bushings and mainshaft.
This happens when gearboxes fail, like failing galled countereshafts.
Although I remember cleaning and polishing the shaft, it doesn't look
perfect anymore. This would indicate that the bushings were not freely
spinning on the shaft. The gears all spin on the bushings.
Lesson learned. I didn't think the bushings needed much clearance when
placed on the shaft. I made them just loose enough to push them on. I don't
know if this cause the top hat failure or it was just one of those things,
but I think a careful rebuild will fix it.
Thanks Bob, Dean amd Randall.
Bob Kramer
Volente, TX
Perfection is not attainable, but if we chase perfection we can catch
excellence.
Vince Lombardi
----- Original Message -----
From: "Kramer, Robert" <RKramer@rdoequipment.com>
To: "FOT" <fot@Autox.Team.Net>
Sent: Wednesday, March 17, 2010 2:03 PM
Subject: [Fot] TR transmission bushing I.D. and O.D.
> Friends,
>
> Are there specs for the I.D. and O.D. for the big TR transmissions? I've
> rebuilt a bunch of them over the years and occasionally I have trouble
> with a
> tranny that doesn't like downshifting into second gear. I think that the
> gear
> is hanging up on the O.D. of the bush and the bushing and gear start
> spinning
> on the mainshaft, screwing up the speed matching of the synchros. I build
> them
> with the bush tight enough that it should not spin on the mainshaft as
> long as
> the gear is spinning freely on the bush. I suspect bad repro bushes. Does
> anyone have an opinion or other experiences?
>
> Bob Kramer
> Sales Manager
> RDO Equipment Company
> 16415 N. IH 35
> Pflugerville, TX 78660
> 512-272-4141
>
> _______________________________________________
> fot@autox.team.net
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe:
> http://autox.team.net/mailman/options/fot/rkramer3@austin.rr.com
_______________________________________________
fot@autox.team.net
Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|