Automatic Transmissions

Tech Sheet: 700R4 "BadBoy" Lockup Control

Note: This tech sheet applies to Wiring for the High Impact "Bad Boy" 700 R4, which has been developed for aftermarket conversions & upgrade applications. It does not apply to conventional GM 700R4 transmissions

The wiring is set up so that several TC lockup options are available.

Pin connections:

There is a 3 pin electrical connector on the transmission (it has 4 marked positions, however only three have active pins).  

Option One - TC Lock up always in 2-3-OD

Pins A and B are internally connected to the Torque converter lockup solenoid. Any time power is connected to pin A and Pin B ins grounded, the TC will lock up in 2nd, 3rd and OD (The valve body does not supply hydraulic pressure to the TC lockup circuit, so it does not lock up in 1st gear whether the TC solenoid is powered or not). Thus, in order to always have the lockup in 2,3 & OD, connect pin A to switched ignition power and pin B to ground.  To make this a switched manual option, put a switch in the leg from Pin A to Sw Ign Power (12V AFTER the ign sw)

Option 2 - TC lock up always in OD

An internal pressure switch connected to a valve body rail that carries pressure when trans is in OD. Thus, this switch will close whenever the trans is in OD. This switch is wired from pin B to Ground internally in the transmission. Thus if  (switched ignition) power is applied to pin A, whenever the trans is in OD, power will flow into pin A, through the TCC solenoid and to ground through he pressure switch.

Option 3 (switchable between options 1 and 2)

Connect switched ignition power to Pin A. Also connect pin B to a dash mounted (or wherever you want it) switch, connecting the other side of this switch to ground. In this method, the TC will always lock in OD, but will only lock in 2 or 3 when the switch is manually on.

There are other possible wirings possible, but they are permutations of the above data.

Basic Internal wiring Data:

 This describes the internal wiring as supplied in our non-computer BadBoy trans. If you bought a BadBoy from us, and it was intended for use in a non computer application, this is how we wire the inside. You should not have to remove your pan. This info is for your reference

Use a pressure switch (Normally open, closes on high pressure) in a 4^th gear pressure port. 88-90 has an external port right behind the 2-4 servo and fwd of the TV cable. Other years: Goes into valve body, inside the pan.

700R4 electrical Harness connector:  Use 3 pin electrical connector on the transmission (it has 4 marked positions, however only three have active pins).

Pin A to the + side of the TCC solenoid.
Pin B to the - side of TCC lockup solenoid
Pin B ALSO to the 4th gear pressure sw on the Valve body.
Note: This pressure sw must be also be grounded. If the switch being used has only one pin on it, it grounds directly through its case to the valve body. THis is fine. If this switch has TWO pins on it, a wire must be connected to it which is then attached to a suitable ground such as a valve body bolt. It can also be run to an external ground, through the remaining pin on the connecter