Overdrive disengages I have a 1987 Toyota pickup 22r carburated not fuel injected pickup two wheel drive with column shift automatic transmission. My problem is with the overdrive automatic transmission. While driving the truck I hear what sounds like a relay clicking and then the overdrive disengages. This occurs more frequently in warm weather. I can reengage the overdrive with the button which is located on the column shifter and it may or may not say engaged. What's going on?

Not worth the trouble and expense. Two different systems, You wuld need new head, intake, computer, vacuum system, lines.

Install a better carb like a Weber.

Contact http://www.lceperformance.com/

what engine ? 22R-TE, 22R, 22R-E California or federal? give me your engine i'll send you the vacuum diagram.
thanks

transmission rebuild time the clutch disc are burnt all ready

Hi Spacey, Sounds as if you have an old model of the HiLux. Is it Carburetor or injection? If its carb I think that's where your problem will be. If there is leakage between the throttle body of the carb and the main body above it, there will be a flat spot when pulling away from start and possibly at higher revs. The easiest way of dealing with the problem is to replace the carburetor. Keep in mind that the most critical setting in any carb is the float level, if its not set correctly it will either flood or starve. Sounds as if you may have those measurements wrong. The settings are specific to the type of carb, if you need further help, tell me the type of unit fitted to your vehicle. Regards Johngee10

faulty switch on autobox.adrian

change the brake light switch i think this is faulty causing your problem

High to low /low to high ratio, you will need to be stopped and the transmission in neutral for this to be changed.
The 2wd - Auto - Lock switch can be switched at any time, as it operates an electromagnetic clutch - 2wd is rear wheels driving only - Auto - is to automatically engage 4wd when wheel slippage is detected (this also happens when turning at intersections, due to the inside wheels having a shorter path to the outside wheels, and can give a binding effect on sealed roads (I don't drive with it in auto on sealed roads) auto is excellent if you get, or expect wheel spin from an intersection when wet, just flick it on before or when you have wheel spin, also on gravel roads, having it on auto will greatly reduce the sliding of the back end, and make the car noticeably more stable.
Lock - this locks the differential, which further reduces wheel spin, when in mud / snow, but this will also make the car not want to turn corners, due to it resisting the different distances traveled by the inside and outside wheels.
A/T switch - this actually has 3 positions, and changes the shifting points of the automatic transmission - the middle is normal - Hold is to hold the gear longer, to improve fuel economy, and not change down (kick down) as quickly - Power has the opposite effect, it makes the transmission change down sooner under acceleration.
Also the O/D (overdrive) button on the side of the Tee shift lever, is to engage / disengage overdrive (5th gear) - never do heavy towing in overdrive, this will cook the transmission and overheat the engine (due to the radiator being used as a heat exchanger for the transmission fluid.
Another little quirk - if the transmission light starts flashing every 40 to 50 km, this can indicate that the wheels are different diameters (a flat tyre, or tyres have been swapped around and the spare is more or less worn than the other tyres), the computer will pickup that the wheels are turning at different speeds.
When cold, it is normal for the transmission to stay in 3rd (2-3 minutes of driving), until it has warmed up, and then stay in 4th for a few more km's (5-6 minutes), before it has warmed up enough to change into 5th (overdrive).

Carbed models should be started at 0 degrees, Fuel injected models at 5.

buy a chilton or haynes manual for the year of your car. cost 14-19.00 most auto parts stores.

red and white with yellow go to #1 and #3.
blue and white go to #2 and #4