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Asked: Sep 02, 2009 - 04:01 PM

Status: Closed

2000 Lexus RX 300 with no overdrive. However, light throttle will allow od and in shop jacked up will always go into overdrive.

2000 Lexus RX 300 won't shift into oderdrive. However, under very light throttle it will shift into od and in the shop with front end raised, no load it always shifts in od. When driving turn key off and restart than shifts into od, od light operates and will downshift if slowing down without going into first it will upshift always. First time out when engine is cold usually get 2 upshifts thru all gears. Pressure solenoid changed, speed sensors changed maf and tps both swapped with known good, only code is for knock sensor bank 2 was told that 1999 thru 2001 knock sensor willprohib shift into od. Currently have intake off waiting for sensors. Any help on problem would be great.

In Maintenance & Repair
2 answers - 70 days ago

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mr_shiftright

Date: Sep 02, 2009
Time: 07:03 PM

Doesn't this car also use a temperature sensor to inhibit overdrive until the car is warmed up?

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snowball2

Date: Sep 17, 2009
Time: 08:25 AM

I if was the knock sensor you would not get any 4th gear shift regardless no load 1st time out etc,dont waist your money,sounds to me you have a pressure problem maybe in the vavle body or in the underdrive clutch itself,because with no load the trans does not need any real big pressures to operate,and when cold the fluid is nice and thick.I would think about replacing the trans or having it rebuilt

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