94 f150 302 4r70w xlt 89,000 new to me
Drained trans+ TC for 3days (work) and new filter. I was going to flush like this site recommends, but I got 11 measured gallons out and what I wore plus what hit the tarp, I just refilled. Codes are as follows 452c and 311r. Trans and OD light are better flashing less frequently and intermittently. After about 300 miles. The only thing I have to say is that my shift into OD is weak. Magnet was fuzzy with gray Permatex anti-sieze type of shmoo. I guess more than I'd like to see. Not sure if it was ever serviced, appeared to have stock gasket. Wasn't necessarily a FOMOCO filter.
As far as 311 and running condition, seems smooth enuff. Tail pipe is very clean though. Physical inspection all hoses and plastic intact. Didnt spray or use propane to check for a leak.
Whats the course of action for both? Thx Dan

 

Continuous Memory DTC 452 indicates the PCM detected an error in the PSOM output signal during the last 40 warm-up cycles.

Possible Causes:
-- Damaged Rear Anti-Lock Brake Sensor (VSS).
-- Damaged PSOM.
-- Damaged harness circuits.
-- Damaged Powertrain Control Module (PCM).
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KOER DTC 311 indicates the Secondary Air Injection system is inoperative.

Possible causes:
-- Vacuum hoses damaged.
-- AIRB/AIRD valve inoperative.
-- Air Pump inoperative.
-- AIRB/AIRD solenoids damaged.

 

Ok, thanks. I'll get picking away at them. Any particular order of likely culprits? My speedo is never 100% rock solid steady.

 

You got 44 quarts of ATF out of your transmission!? Wow! There is a dipstick so did you check the fluid level after you refilled the system or not?

 

Oops, yeah,so how about 11 quarts. Thats seem a little more in spec.Yep, checked after I filled.