Toyota’s U660E mounted to a V6 engine and the U760/1E with the L4 is a front wheel drive transmission. It utilizes 7 solenoids to achieve 6 forward gears along with flex lock up control.

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When a hydraulic/mechanical fault occurs with one of these solenoids (as mentioned earlier), the diagnostic process begins with checking the operation of the solenoid and its related valve(s).

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Now, rather than having a gear ratio code, a performance code or codes are set for the specific solenoid or solenoids responsible in making the shift change and holding the gear.

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In this last and final article of this series, we will be looking at the Transmission Adaptive Values Learn. As most know by now, this is a series of tests that are run to allow the transmission control module (TCM) to learn individual clutch characteristics. Click below to read more.

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Inside we will be looking at the Line Pressure Specifications and continuation of A Look at Ford and GM's Jointly Built 6T40 Transmission: Part 2 of 4

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With the exception of the Low and Reverse Clutch, each clutch inside this transmission is operated by a solenoid through its respective regulating valve. 


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Oct. 10, 2002, Ford and GM announced that they would join together to develop a new six-speed front wheel drive automatic transmission. Working on this project together would not only offer a cost-saving factor in its development, they could bring a new transmission to market sooner. 

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In 1998, with all AODE/4R70W transmissions, Ford decided to exchange a typical internal wiring harness for a molded circuit board. This affected the construction of the pass through case connector and all the internal solenoids.

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