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 1988 2.6 auto Trans question
#881551
04/18/08 05:11 PM
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Joined: Jun 2006
Posts: 82
OP
Getting the Wheeling Fever
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Still having problem with over drive. If I go on the freeway and drive 4-5 miles at 65mph and slow down over drive will start working until I turn the car off. If return to the car and start driving again no OD. My question is I know based on all the discussions on this topic the most logical problem is electrical but does OD also work off of line preasure or maybe because I am not using Mitsubishi ATF a valve is sticking? At $4 a gallon I hate not having over drive. <img src="/forums/images/graemlins/confused.gif" alt="" />
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Re: 1988 2.6 auto Trans question
[Re: bigroxydog]
#881552
04/18/08 08:33 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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There's a coolant temp switch in the o/d relay coil ground path that won't let it go into o/d until it warms up. If your thermostat is bad (stuck open) or missing it will do what you describe. You can ground the wire at the sensor/switch, replace the t'stat, or replace the sensor/switch (on the water neck, one skinny wire connection. Other one wire sensor is for the gauge. Two wire sensor is for ecu.
Not responsible for advice not taken...
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Re: 1988 2.6 auto Trans question
[Re: bigroxydog]
#881553
04/18/08 08:35 PM
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Joined: May 2000
Posts: 6,132
Trail Leader
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First place I would look...
There is a thermal switch on the intake manifold to turn off your overdrive if the engine overheats. Over time the connection on it loosens and it becomes intermitant.
Its a single wire sensor near the thermostat.
Kevin C
87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...
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Re: 1988 2.6 auto Trans question
[Re: Kevin C]
#881554
04/18/08 09:23 PM
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Joined: Jun 2006
Posts: 82
OP
Getting the Wheeling Fever
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Thanks guys I will try your ideas this weekend.
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