[T3] poppin out of 4th!

[Max Welton]

I think the engagement dogs have a slight backwards angle to them when new
that hold them in gear..

Max


On Mon, Oct 27, 2025 at 6:03 PM Keith Park <topnotch at nycap.rr.com> wrote:

>
>
> The Squarebacks transmission was rebuilt again by an experienced local
> builder a couple years ago after the west coast builders job ground the
> input shafts bearing down to a nub.
>
> Worked fine and was very happy with it for the first few thousand miles but
> now it occasionally pops out of 4th under moderate acceleration.  This
> Tranny has the Bus 3rd and 4th gear in it
>
> For the Freeway flier as it did on the first build with no popping issues,
> but he did change out the 4th due to minor damage from the sloppy bearing.
>
>
>
> Now I know that the old swing trannies would pop out when they wore out but
> this is IRS, and nothing in there should be worn with less than 10Kmi on
> it,
>
>
> So what could it possibly be?  I have adjusted the linkage at the shifter
> (moved the plate forward to make sure its pushed in properly) to no avail,
> the rest of the linkage
>
> Is good although the guide bushing below the shifter is worn (as they
> usually are).
>
>
>
> One clue may be that if I make note to get it in firmly it hasn't popped
> out, and if its in for a mile, its in for 300miles, never pops out after
> the
> first mile, so
>
> What is SUPPOSED to hold it in gear?  Trannies are a black box for me so Im
> trying to get a feeling for what could be wrong by understanding how it
> should work in the first place.
>
>
>
> Keith
>
>
>
>
>
>
>
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