lock up $non lock up???

[turboTURBO]

how do you tell the difference??? what does it do?? and which is my 85 tranny??
thanks

 

[FastRegalWE2]

lock up should have a square 4 pin plug on the left (driver) side near the front corner just above the pan rail. 85 should be a lock up unless someone took it out and put in a TH350 or 400

 

[turboTURBO]

what is it for and what does it do??

 

[FastRegalWE2]

I think it controls the TCC solenoid but Im not sure

 

[GNeric]

Lockup provides a direct mechanical link between the input shaft and engine. It eliminates slippage in the torque converter (which eliminates heat) and improves gas mileage. There is a clutch inside the converter and when the solenoid is engaged, the lockup valve in the pump moves and re routes fluid to evacuate the fluid from behind the clutch in the converter providing the mechanical link.