[Fot] Transmission for racing GT6+
Larry Young
cartravel at pobox.com
Fri Sep 21 12:34:31 MDT 2007
My transmission rebuild article at www.vtr.org has pictures of the three
different layshaft bearings and typical layshaft wear. The best
arrangement was the loose needle bearings used in the 3 synchro boxes,
but unfortunately these can't be used in a 4 synchro box. I agree with
Glen. The shell type bearings are the next best and they can be used as
a direct replacement for the open cage bearings. Triumph seems to have
changed these bearings more for ease of assembly rather than improved
wear and reliability.
Fubog1 at aol.com wrote:
> In a message dated 9/21/2007 12:43:00 AM Eastern Daylight Time,
> billb at bnj.com writes:
>
> Generally the layshaft bearing goes south because
> it's small and not all that well supported. I've heard that there are
> some fixes for this, including dual bearings on the rear end of the
> layshaft. Anyone ever hear of this?
>
>
>
> The Stag has an improved laygear bearing setup but there really isn't that
> big a problem with the stock arrangement IF you use good parts & service it
> regularly.
> Some of the laygear replacement bearings are caged & don't have many needles
> in them. Torrington has a nice bearing but sometimes you have to deepen the
> housing bore a tad to fit them.
> The laygear thrusts wear from the little pieces of trash getting behind the
> gear & the thrust washer & backside of the washer & eating up the gear thrust
> washer & case but frequent lube changes minimizes this.
> The biggest problem is getting good parts for them. Most of the good OEM
> stuff is gone & repros are always in question.Syncros are a big problem, lot of
> bogus pos replacements on the market.
> Kens BFE CR gearset is great & if the box is built right & maintained it
> will live a good life.
> Glen
>
>
>
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