At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.Google+
Car Problem Reports
Toyota T100 Automatic Transmission May Not Shift Correctly at High Mileages
Toyota T100 Problem
Drive Trains Affected: 2WD, 4WD
Average Mileage: 166,009 mi (117,000 mi - 280,000 mi)
Doesn't shift from 2nd to 3rd when cold. When engine temp is on the way up to normal, it will shift. A 2 minute warm up usually works. Also shifting onto OD doesn't usually happen until 55 MPH, even when driven for 10 miles or more. Letting off the gas at 50-53 MPH will sometimes allow it to shift but not always.
Visitor, 1997 Toyota T100, 4WD, 280,000 mi
when my Toyota t100 is cold it shifts fine once it warms up it doesn't want to go past in the 3rd and overdrive I can you give me some things to look for
Visitor, 1995 Toyota T100
HIGH RPM AT LOW AND HIGHWAY SPEEDS. I WAS TOLD THAT IT COULD BE SHIFT REGULATOR? THIS PART IS INSIDE THE TRANSMISSION AND MAY COST ANYWHERE FROM $369.00 TO $ 700.00 AND THE INSALLATIONMAY COST FROM $1500.00 TO $2500.00. I GET AROUND 9 TO 12 MPG AND THAT HIGHWAY OR CITY
Visitor, 1997 Toyota T100, 4WD
most the time i break i here a sqeez noise.
Visitor, 1993 Toyota T100
Visitor, 1997 Toyota T100, 2WD, 149,600 mi
Transmission fails to shift properly at the 2-3 shift when cold. Called toyota and they have informned me it is normal. this process is to get the A/T fluid up to temp