[Fot] Triumph 4 speed O/D's and Layshaft bearing failures.

Glenn Franco brakey6666 at gmail.com
Sat Aug 10 13:50:23 MDT 2019


Just finished another A Type Overdrive rebuild this afternoon. Next one I
do I'm going to insist that the owner bring a spare 4 speed for parts or
maybe 2.
I very rarely find an overdrive transmission that the layshaft bearing next
to 1st that hasn't walked and tried to escape the case through the thrust
bearing. I have tried in vane to remove the laygear with one that ground
its way into the thrust bearing and sometimes the case. I sometimes get the
laygear out but in most cases the trans case with the laygear is sent to
scrap.
Does anyone have a solution, trick, special tool, to ease the laygear out.
The normal way is to remove the small thust bearing with a magnet so you
can tilt the laygear enough to get it out. I have even once resorted to a "
Slugger Slide Hammer" and chain wrapped around the laygear to get it out.
Didn't end well however.
I did read somewhere that someone is using a tapered roller bearing on that
end which would make more sense than the original design.
Please advise
Thanks in advance
Glenn
TR6, TR250, Miata, 47 MG TC For Sale, 73 BMW E10 2002 being restored
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