FORDFORDFORDFORDFORD86

© 2007 ATRA. All Rights Reserved.

The Computer can operate the TCC in all Forward range positions. This diagramshows the valves in the lock up off position. The TCC solenoid is a normally OPENpulse width modulating solenoid that is fed main line oil in all ranges.

TorqShiftTCC Operation

87FORDFORDFORDFORDFORD

© 2007 ATRA. All Rights Reserved.

TorqShift

When the computer commands the solenoid to start modulating, the solenoidpushes the valve up and exhausts the oil from the front of the Converter Clutchallowing it to lock-up. This diagram shows the valves in the lock up on position

TCC Operation (continued)

FORDFORDFORDFORDFORD88

© 2007 ATRA. All Rights Reserved.

It is very important to be absolutely sure this orifice is clear of debris, if this pas-sage is clogged, main line pressure can’t get to the TCC solenoid. This will preventthe TCC from locking-up and cause a number of codes that associate to TCCoperation.

No Lock-Up Before or After Rebuild

TorqShift

89FORDFORDFORDFORDFORD

© 2007 ATRA. All Rights Reserved.

TorqShift

You have built the transmission the best you can and it wont lock up, now what?Simple: build a lock up tool. This tool will tell you absolutely that your Torqueconverter and pump are working correctly.

Lock-Up Test Tool

Carefully pull the solenoid apart. It’s not necessary to remove the allen screw andspring from the tip of the solenoid.

Bend the 4 tabs out to remove the solenoid parts.

FORDFORDFORDFORDFORD90

© 2007 ATRA. All Rights Reserved.

TorqShiftLock-Up Test Tool (continued)

Secure the solenoid plunger to the Snout of the solenoid with a small hose clamp.Be sure the screw portion of the hose clamp is aligned with flat on the solenoidsnout. If its not aligned properly it will not fit into the solenoid body

91FORDFORDFORDFORDFORD

© 2007 ATRA. All Rights Reserved.

TorqShiftLock-Up Test Tool (continued)

Remove existing TCC solenoid and install the tool as shown. Put the pan back onand fill with fluid.

CAUTION!This will cause the TCC to be engaged in all ranges. If the TCC and the pump areoperating properly the transmission will kill the engine right away. Engaging thetransmission with the TCC on will be very hard on the new TCC lining, so keepthis test to a minimum.

FORDFORDFORDFORDFORD92

© 2007 ATRA. All Rights Reserved.

TorqShift

This truck was setting a code 1744 TCC performance. This truck also had verylittle if any lock up feel to it at all. The problem was a misplaced retainer clip.Turns out the rebuilder had pushed the sleeve in one land too far.

P1744 TCC Performance

This causes a MASSIVE loss of TCC apply oil.

Correct installation

In-correct installation

93FORDFORDFORDFORDFORD

© 2007 ATRA. All Rights Reserved.

TorqShift

Use the following illustration to correctly install the clip into the pump housing.

P1744 TCC Performance

FORDFORDFORDFORDFORD94

© 2007 ATRA. All Rights Reserved.

TorqShift

Before or after the rebuild and the TCC is on all the time killing the engine. Wecan modify a solenoid so that no oil is fed to the TCC control valve. If the TCC stilllocks up then we KNOW that this is going to be a hard part issue. This test willcompletely block oil from getting to the TCC solenoid.

TCC Stuck On

Remove the End cap

Using an Allen,remove the screwfrom the Solenoidbody

Remove the AllenScrew and Spring

Install check balls to blockthe valve into the solenoidsnout