After 2 days of waiting for the 'official' tail end top plate, we made one.
Replaced transmission mount with new OEM. Installed transmission, new Magnefine filter before fluid entering coolers, Hayden 699 cooler in-series after radiator cooler, new Denso radiator, OEM cap, Toyota red coolant, OEM thermostat and OEM heater control valve, filled with Toyota TIII fluid and tested.
Runs very smooth, firm yet not harsh 1-2, just like OEM and gentle 2-3 and final 'shift' into OD. Took it easy first day and now have driven at highway speeds while climbing hills where I could turn OD off, handles it very well.
I can now tell old trans was 'sluggish' 1-2 and 2-3 shifts, this one feels like I'd shift a Porsche manual, fast, smooth and accurate with a quick power take off in next gear.
Old trans fluid was changed just last summer, it came out Black and had many tiny chunks. Tried to remove TC from old trans, it was stuck solidly in place - its bearings must have failed and it glued itself in place. Despite this, it would still shift and run with occasional noises like marbles inside of it. It lasted 338, 861 miles, RIP.
Yota1 <
Yota1 Performance Engine & Machine - Your Toyota needs all in one place! > out of Riverbank, CA (nearish Stockton/SF area) provided great service and product, highly satisfied. They are super busy so a wait may be in order. Mine was essentially a wait from Oct 25 to Dec 27, it was worth it.
My Runner only gets about 5-6K miles of us per year (mostly for deer lease travels and some DD) yet I'm going to try to increase that. I plan on annual drain/fills for this transmission.
While we were at it we aimed for a suspension refresh, we swapped out all shocks/springs (blue/yellow & yellow/red) using new '99 highlander 'talls'. Also replaced all bushings, many were quite a pain to R&R, some were easier, LBJs with new bolts + protector boots, upper ball joints and rear upper control arms. Then took it in for a 4 wheel alignment, toe in was significant - feel great now.
Here's a pic of how it sits now, the change in driving characteristics is night and day - even that doesn't describe it. More car like and less truck like. The off-road tests come next.