Randell Jesup wrote:
>
> Fred Krampits <fred@hprrc725.rose.hp.com> writes:
> >Now on the gearbox problem, it pops out of 4th almost every time I use
> >it. However if I am very deliberate in going through the gears I can get
> >it to stay in 4th sometimes. It pops out as soon as I stop
> >accellerating, sometimes forcefully, sometimes gently, I DO NOT try to
> >hold it in 4th. I did not fully understand the replys I got, is this
> >something that may be fixable from the interior?
>
> Fixable without pulling the trans? No. Also, I strongly advise
> NOT using 4th anymore until this is fixed. Everytime it pops, I believe it
> causes angled wear on the gear 'dog' teeth (what you grind if the synchros
> are dead, but in this case the wear problem is with the parallel section
> wearing at an angle, not the pointed-teeth section).
>
> I drove a Sprite with a dead 4th gear for 2+ years as my only
> transportation in high school/college. 5500-6000 rpm cruise on the highway
> (1098 (10CC) engine, 4.22 rear). Fun on highway trips. (NOT)
>
> Two primary possible causes for popping: one, a worn or weak
> spring/plunger on the 3rd/4th fork shaft.
Second, worn dogs on the input
> gear or on the 3rd/4th collar. (Ok, two others: worn shift fork not fully
> engaging 4th gear, and worn bearings (input shaft), maybe.)
>
> --
> Randell Jesup, Scala US R&D, Ex-Commodore-Amiga Engineer class of '94
> Randell.Jesup@scala.com
> #include <std/disclaimer>
> Exon food: <offensive words no longer censored - thank you ACLU,
The main problem I have found over the years, that causes 4th gear to
pop out has been worn indentd on the 3rd - 4th shift rod.
Pete Phillips
61 Bugeye
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