[W126 Coupe] Re: (W126) Odd Trans Problem

[jeffk at gsm.udallas.edu]

Many thanks to all for your prompt suggestions. This is what I'm faced with:

1. Last complete tranny service was around 20k miles ago. No hard driving,
neither extremes of climate. Level always seemed ok (yes, I check it under
conditions recommended by Richard and Robert). Before this incident, car
hadn't been driven for two months while I was away, but showed no untoward
signs on startup. There is no external leak.

2. If there is so much fluid transfer between the t-converter and sump that
the cold level is high while the hot level is very low (again, trans shifts
smoothly for a mile or so upon startup), perhaps the t-converter is
evacuating too much fluid thus starving the tranny and causing
non-shifting? Would the solution (though iconoclastic) be to overfill the
cold sump to ensure the tranny gets enough fluid? Is there a valve/seal
that should prevent the t-converter from draining?

3. I can drain the sump and t-converter, change the filter etc., and refill
per Dick Spellman,  but was always leery about introducing completely new
fluid. I blew out an Audi tranny doing this and subsequently read that new
fluid dissolves things in there that are best left undisturbed.

To overfill or not, that is the question. Trouble is that I am aware that a
wrong move at this point may end up costing me the GDP of Peru.

Thanks,

Jeff Khan 

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