Don't forget to check the shifter rod bushings which could also be worn out,
making it hard to adjust.
Mike Boteler
'56 8400 Wrecker
Hughesville, Maryland
----- Original Message -----
From: "Ron Keller" <tinwiz1@hotmail.com>
To: <oletrucks@autox.team.net>
Sent: Monday, January 08, 2001 12:53 AM
Subject: Re: [oletrucks] slipping outta gear
> Hi Mike!
> Your's is a common problem.
> If you have a column shifter,as I did, it may be as easy as re-aligning
> the shift linkage ...(also aftermarket floor shifters too)
> ...BUT if it's a top loader, say from a one ton , your guess is as good as
> mine. But, If the linkage adjustments don't do it, then I'd be looking at
> the synchros in the tranny...in short,a rebuild!
>
> ***Synchros***
> ...can be easily checked by accelerating in each gear and then instead of
> shifting, back off on the gas and let the vehicle slow right to
nothing...if
> it pops out of gear each time you decelerate, then the synchro for that
gear
> needs replacing. BUT, you make sure your linkage is fine FIRST....
> Also, if your tranny kind of catches each time you change gears(ie:
slight
> grinding or click) but YOU KNOW your clutch adjusment is fine, then your
> synchros need attention. (Drive an old model A ford and you'll know what
"no
> synchro" driving is like!...lol!)
> "Double clutching" can help you avoid the embarassment but it's only a
> bandaid not a cure. Before you take the tranny out for synchros check the
> shifter alignment as follows.
>
> ***shifter linkage adjustment on a column shifter***
> 1/ To do that...get under the truck and remove the cotter pins in the
> shift rods at "the tranny end".
> 2/ Take ALL the shifter rods out of the arms "on the tranny" and let
them
> hang there.
> 3/ Now,manually shift the tranny into first gear.
> 4/ Get a friend to sit in the truck "while your underneath" and have him
> shift the "column shifter" into first gear. (remember it's not hooked up
to
> the tranny yet)
> 5/ Now, while your underneath the vehicle, you try to place the first
> gear shifter rod back into the hole in the first gear tranny arm. It
should
> fit "PERFECTLY" into the tranny arm hole, without having to move the
tranny
> arm. IF it doesn't...you have to ADJUST the column shifter "rod"" until it
> fits in the hole of the tranny arm.
> 6/ Do the same for each gear.
> Basically what your doing is putting the tranny ALL THE WAY in gear
> MANUALLY, then seeing if the shifter actually moves each arm ALL THE WAY
> into gear. A lot of the time you may not actually be right "in" gear, thus
> your tranny pops out of gear on rough roads or sudden bumps. The worst
case
> is you'll need to replace syncros...but let's hope it's just you linkage
> adjustment,ok?
> I hope this is of some help to all who suffer from "jumpin'trannies"!
> Bye for now, Ron Keller
>
>
> >From: MLayton324@aol.com
> >Reply-To: MLayton324@aol.com
> >To: oletrucks@autox.team.net
> >Subject: [oletrucks] slipping outta gear
> >Date: Sun, 7 Jan 2001 09:37:51 EST
> >
> >i am sure that most of you have experienced the situation in which you
are
> >traveling down the road in high gear and all of a sudden the column shift
> >flies into nuetral and scares the heck out of you my 50 3100 pickup
used
> >to
> >do it quite a bit but stopped when after i rebuilt the engine and
replaced
> >the clutch and pressure plate my 50 burb has really never done it
but
> >once however, on the way home from a 200 mile road trip on friday, it
> >slipped out about 3 or 4 times in the last 30 miles or so what can
cause
> >this and/or what should i check? thank you
> >
> >
> >Mike Layton
> >Sumter SC
> >
> >37 1ton
> >50 2 ton
> >50 3106 suburban
> >50 3600 wrecker
> >50 3100
> >50 panel
> >51 panel
> >51 3600 flat bed dually
> >51 3116 suburban
> >52 3116 suburban
> >52 3100 5wdo
> >59 apache fleetside
> >66 c20
> >68c30
> >oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
> _________________________________________________________________________
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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