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What can cause ATC light to come on and possible repair? Toyota 4Runner.

headgasketheadgasket Posts: 5
edited August 2014 in Toyota

Have 1995 Toyota 4Runner 4x4 SR5 V6 Auto 220k mileage. I live in Colorado at Altitude.

Prolonged hwy speed ,pull up hill even slight grade after 20 minutes, hot or cold, loaded or not (slightly worse hot) ATC light comes on. If I continue to drive the performance drops and if I continue worst case scenario is trans fluid blows out of overflow vent. No other mil and all other gauges in normal range i.e. temp and oil pressure. I do not tow afraid to. Have to pull off road and wait about 5-10 minutes in order to continue. That sometimes is a problem since I am single female.

Recent repairs are battery, timing belt/water pump, cat back exhaust, tranny cooler flush and transmission fluid change. Mechanic says the trans fluid was not burned and had normal sediment for mileage. No change in symptom except seems more responsive after exhaust work. I can't say much for performance of this vehicle it is a slug.

Transmission shop of course wants to sell me a rebuild they don't want to address the symptom they just see the mileage and say replace or rebuild. IMHO that would exceed value of the vehicle and I still have 220k on engine so.....

Any suggestions to address the ATC problem any way to diagnosis what is actually happening? Larger trans cooler? Radiator has been flushed but not sure of the tranny cooler embedded in the radiator can be flushed. No coolant or transmission leaks.

Please help this is my only vehicle and need to get to work so daily driver as well. Hopefully can resolve since I would like to take it hunting this year early November but I have to drive 200 miles to get to hunt area it would take me day and a half.

Thank you

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