Hi I have pulled 628 code 1994 f150 4.9 How much should I use the truck in other words if I am going to get a rebuild should I run it till it quits
Thank you

 

Better do the pinpoint tests for code 628 in the 1994 PCED
It might just be a failing TCC solenoid

 

I will read up on that and do so. Can you please tell if I do have a bad torque convertor does that indicate I need complete rebuild
Thanks

 

You can have just the TC go bad.

 

Thank you

 

Can you please tell me what PCED Stands for and where I might find it

 

PCED stands for Powertrain Emissions Control Diagnosis
They are by year, big thick expensive book
Also, on AllData for free at your local county library
Here's one of mine

 

Thank you

 

Torque converters have three moving parts and a clutch.
Shell spins with engine
Impeller moved by circulating fluid turns tranny’s input shaft
Supercharger (pinecone in the middle) forces fluid to outer edge of shell and drives tranny’s pump.
The clutch locks the impeller and shell together at around 35mph to prevent engine spinning faster than tranny and wasting power / fuel.
If the clutch in there is going out nothing else will be affected

 

Thanks that's very good information