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Part # TCI-9006 

Revised 9/6/2016 

Toll Free: 1.888.776.9824 
www.tciauto.com 

TCI

®

 Automotive 

151 Industrial Dr. 

Ashland, MS  38603 

Phone:  662.224.8972 

 
 
 

 

 

 

TCI

®

 376600

 

Universal TCC Lock-Up Kit for 700R4 and 2004R 

 

This kit enables hands-free, automatic activation of the Torque Converter Clutch (TCC) along with the 
option of manual control. 

 
TCI

®

 376600 Kit Contains:

 

Qty.    

Description 

One (1)  

Internal Wiring Harness 

One (1)  

External Wiring Harness 

One (1)  

Vacuum Switch 

One (1)  

Fourth Gear Pressure Switch - 2 terminal, N.O. 

Two (2)  

Splice Connectors 

One (1)  

#4 Machine Screw 

 

Step 1 — 

Drain transmission oil pan. You will need a pan to catch fluid. Remove transmission oil pan 

bolts.  When  removing  bolts,  remove  so  pan  will  not  drop  completely  off.  Instead  it  will  be  held  in 
place so that one side will allow the fluid to be drained. After the fluid has drained, remove the rest of 
the bolts  and pour out  the remaining fluid.  If  your transmission did  not  come with  a drain  plug,  you 
may want to install a TCI

®

 805800 universal drain plug kit into  your pan now that  you have the pan 

off. Remember To Dispose Of Used Oil In An Environmentally Safe Way. 

 
Step  2  — 

Remove  original  internal  wiring 

harness. 

Carefully 

disconnect 

the 

wire 

connectors from the switches. Remove the wires 
from  the  clips  and  unplug  the  wiring  harness 
from the connector near the detent roller spring. 
Pry  connector  tab  away  from  the  plug  and  pull 
the plug down. Do not pull on the wires.  

 
Step  3  — 

Based  on  your  application,  find  the 

wiring  diagram  to  determine  the  proper  fourth 
gear  pressure  switch  location. 

See

 

Figures  1,  2 

and  3

.  Install  the  switch  and  torque  to  8  foot-

pounds.  Additional  OEM  switches  may  be  left 
in place even though they will not be utilized. 

 

 

 

INSTRUCTIONS 

 

Figure 1: 700R4 Street/Strip Wiring Diagram 

Summary of Contents for 376600

Page 1: ...ow the fluid to be drained After the fluid has drained remove the rest of the bolts and pour out the remaining fluid If your transmission did not come with a drain plug you may want to install a TCI 805800 universal drain plug kit into your pan now that you have the pan off Remember To Dispose Of Used Oil In An Environmentally Safe Way Step 2 Remove original internal wiring harness Carefully disco...

Page 2: ...ssion case connector into the transmission If you are working with a 700R4 you may want to transfer your OEM plastic wire retainer from your factory wiring harness to the TCI wiring harness in order to keep wires neatly in place Step 5 Figure 4 shows how the external wiring harness is intended to be connected To use the 4 machine screw to retain the switch to the case a new 3 32 hole must be drill...

Page 3: ... switched 12 volt source Now you may manually turn the lock up system completely on and off Option 3 is for those who desire immediate release of the TCC when braking For this you ll need an OEM brake pedal switch with a normally closed circuit Run your switched 12 volt source through the brake switch and then to the red wire on the TCI external harness Step 7 Reinstall Transmission Pan Install a ...

Page 4: ...t first going through a pressure switch than it can simply be left in place because that is how the 376600 is wired as well Q What do I do with the other pressure switches that are on my valve body A The simple thing to do is just leave them in place even though they are not hooked up They cannot be removed unless you replace them with 1 8 pipe thread plugs Q What do I do with the extra green wire...

Page 5: ...rder for the system to work properly the converter clutch valve in the pump must be operable the friction lining and apply piston in the torque converter must be in working order the 0 ring on the end of the input shaft must be in good condition and some valve bodies even have an additional converter clutch valve in them as well which must be functioning It is possible for anyone of the aforementi...

Page 6: ...ars chances are that there is something else wrong with the transmission The wiring harness is only responsible for turning the torque converter clutch solenoid on and off and it has no effect on the transmission s ability to go into and hold reverse and the four forward ranges Have any problems diagnosed and repaired by a qualified technician immediately Social Media Stay up to date with the late...

Page 7: ...ity for any errors made in tolerances component selection or installation There is absolutely no warranty on the following Any parts used in racing applications Any product that has been physically altered improperly installed or maintained Any product used in improper applications abused or not used in conjunction with the proper parts Damage due to excessive manifold pressure e g nitrous backfir...

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