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<div> <font size="2">Jack the late laygears use a pressed-in "shell" bearing.</font></div>
<div><font size="2">They can be fitted to the early circlip gears and aren't an issue but the pressed-only have a tendency to walk out and lathe (used as a verb) into the thrust washer so it can't be removed, so nor can the gear.</font></div>
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<div><font size="2">The wear issue is exacerbated by all of the metal crumbs generated above the area by 1st/reverse gear graunching.</font></div>
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<div><font size="2">Glen</font><br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: Jack Wheeler via Fot <fot@autox.team.net><br>
To: Glenn Franco <brakey6666@gmail.com><br>
Cc: Triumph 'Friends of Triumph <fot@autox.team.net><br>
Sent: Sun, Aug 11, 2019 8:47 am<br>
Subject: Re: [Fot] Triumph 4 speed O/D's and Layshaft bearing failures.<br>
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<div dir="ltr">I have rebuilt many TR-3B through TR-6 gear boxes, both with and without overdrive. The failure mode you mention is common, where the lay gear grinds into the rear thrust washer, and sometimes into the housing. However, I have never had trouble removing the lay gear. Once I remove the thrust washer, the lay gear lifts right out. Am I missing something? Are you working on a Spitfire or GT-6 gearbox?</div>
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<div dir="ltr">Once again, I pull the rear thrust washer out, generally with the transmission oriented with the bell housing down. Then, with the gearbox oriented in the upright position, I lift up the end of the lay gear where I have just removed the thrust washer. Once it clears the boss at the rear of the housing, the lay gear comes right out.</div>
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<div dir="ltr">Not sure this is any help, but that's my experience.</div>
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<div dir="ltr">Jack Wheeler<br clear="none"></div>
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On Saturday, August 10, 2019, 3:52:18 PM EDT, Glenn Franco via Fot <fot@autox.team.net> wrote:
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<div>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.</div>
<div>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.</div>
<div>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.</div>
<div>I did read somewhere that someone is using a tapered roller bearing on that end which would make more sense than the original design.</div>
<div>Please advise</div>
<div>Thanks in advance</div>
<div>Glenn</div>
<div>TR6, TR250, Miata, 47 MG TC For Sale, 73 BMW E10 2002 being restored</div>
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