1995 f150 5.8, 280kmiles. runs like a bear, idles perfect, sat for about a month in the mountains, slight mold on floormats. drove approx 50 miles fine. second drive, shift into 2nd gear at high rpm, O?D starts flashing, speedo jumps, then speedo/odo dead, trans in limp mode. replace vss, all fuses in and out look good, mlps replace about 1.5 years prior with rough shifting, perfect since. key off codes 111,10,452, key on codes 116,536,632,116. whats next step, psom? another relvant sensor replaced prior to that? i saw some psom on ebay is this asking for trouble?

 

Thanks in advance for any additional info, i'm an engineer and fabricator by trade, somewhat knowledgeable on trucks but definitely not my area of expertise

 

Welcome to the site!!

Hopefully someone can give some advice.

 

The 452 code is telling you that the PCM isn't getting a vehicle speed signal. That would be caused by any or all of three things. The VSS, the wiring to the VSS, or the PSOM. One, two, or all three of those are bad.