Back at it..
Had a real struggle with cleaning the blasting grit out of the detent passages today.
Details here, if you scroll down -->
https://www.thesamba.com/vw/forum/viewt ... start=1720
On that note,
Does anyone know where to get an on-line manual for the 915 trans?
Apparently my '76 trans has a few differences from the one in Zimmerman's tutorial.
Would hate to pay Porsche prices for a shop manual to get just a couple of specs..
Been searching high and low to no avail.
Anyways,
After Paul suggested a new synchro ring or two,
I started trying to wrap my head around this.. Started looking at 1-2.
The synchro ring supposedly has a super-hard sprayed-on coating that shows rough on the OD of the ring.
Any shiny spots, where the roughness has worn away, means that the ring needs replaced.
This doesn't seem to be my case here - right?
Measuring the OD of the ring assembled into the gear/teeth is showing some odd numbers.
One of these gears was pulled apart and inspected, the other was not.
Here are 1 and 2 showing the different measurements I'm getting at different points.
Note that many of those measurements are oddly under spec.
The measurement gets bigger with wear, right?
Wonder what is up with some of these measurements being so small??
I can read a caliper - And I promise I'm holding my mouth right..
If i'm getting this, the ID of those teeth gets bigger as they wear against the OD of the ring.
That's the 9 degree angle, that you spoke of, that wears, correct?
There is also wear at the ID of the synchro ring, inside the gear, that we are not measuring or checking for.
So this is why it's good to replace synchro rings while we have it all apart...
Also want to double-check that the synchro ring only is OK to replace..
Don't have to buy a new slider sleeve if we dress the corners of the slider teeth down - provided it's in decent shape.
Someone somewhere said you had to replace sliders with rings..
So,
Even though my measurements are all under spec,
And the visuals are good on them,
It's still worth the $176 each to replace the rings?
Just want to be sure...
It somehow comforts me to use parts that are already worn-in together.
Oh, and,
Thanks again for holding my hand.
Getting to the truth with these things is harder than I thought it would be..