89 Cressida trans drops out of high gear - likely cause?

Have an 89 Toyota Cressida. About a week ago I started experiencing two sym ptoms pretty much simultaneously. When cold it was reluctant to upshift. Wh en hot after about 20 mins it began dropping out of 3rd/Overdrive - i.e. en gine would race, clearly the trans wasn't in gear. I could manually drop it into second but wouldn't upshift back into 3rd/OD. Pull over, turn the car off, turn it back on ran okay for a while, would dump out of gear again.

I got it home, pulled the pan on the trans, replaced the filter. Flushed th e trans by disconnecting the outlet line to the radiator and letting it flo w into a bucket while pouring fresh in. Probably ran about 16 gals through the trans, with the goal of purging the trans and torque converter to get a ll the old fluid out. Admittedly it was overdue - there was some debris in the filter, some gray sludge in the pan, obvious buildup of particles cling ing to the magnets in the pan. Purged it again the next day with probably 1

2 gals.

Both originally mentioned symptoms disappeared for a couple of days - shift ed crisply even cold, no dumping out of high gear. Then tonight on the high way it dropped out of high gear again. Pulled over, put it in park, then ba ck into Drive and it was okay again. I'm guessing it needs another rebuild, was done once about 8 - 10 years ago, got run dry once due to my being neg lectful about a not tight enough pan.

I'm still curious, what particular component(s) in the trans do you think i s causing this drop out of high gear symptom? Like I say, it stopped doing for a couple of days ago after a fluid transfusion but whatever caused it i s still going on even if less prominently.

Thanks.

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brassplyer
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replying to brassplyer, miguel wrote: Doesnt the cressida have the same engine and transmission as the supra?

Reply to
miguel

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