04 F150 Limp Mode
 

Okay I am trying to figure this out. I took my truck off road a few days ago and if I spin my tires very much at all the truck goes into limp mode. This happens in 2WD and 4x4. The thing I am trying to figure out is, is it a TPS that needs to be replaced, or is the ABS light being on causing this. The thing is I had my throttle body taken off and the gasket replaced, all at the same time I also had the wire leading to my rear diff that was cut/burnt into that goes to the speed sensor fixed. My issue with this went away.
My ABS light is back on an has been for a bit, its not the speed sensor nor the wire yet the code that is being shown is code B1230 "Malfunction Rear Speed Sensor" even after replacing the speed sensor. So I am assuming my ABS module is probably bad and needs to be replaced, however last night while spinning and ending up getting stuck my truck through a code after going into limp mode as well. The code was for the TPS, P2106.

So my question is can ABS light being on cause a truck to go into limp mode if spun to aggressively off road, or is it the TPS sensor that needs to be replaced? NEVER MIND. Found my answer the truck will throw itself into limp mode if the rear speed sensor is not functioning properly. I bought a new speed sensor and still got a B1230 code any suggestions? I really don't want to think its my ABS module if its not, and code readers at advanced do read my ABS and the only code for it is B1230.

Also I got another question and I know this has been talked about, yes I know where the IWE thread is. My truck now when in 4x4 the front passenger side just grinds and doesn't spin, driver side doesn't make no noise but will not spin or else I didn't get it to spin because the grinding scared me so I disengaged it. I was sitting idle each time tried putting it in neutral reverse 4x4 low has the same effect. Someone tried to tell me it was my differential in the front, I don't think it is as it sounds to be coming from just the passenger side.. I think I got a vacuum issue some where. The truck is trying to engage and it does. I am just trying to narrow down which part to replace. The outter hub has a seal in it and my theory is its the culprit however not sure what this part is called? I did have my whole front end apart prior to this but I am pretty sure I got the cv axle lined up with the gears and back where it needed to be at and I put grease in there as well. Any suggestions on this would be great. Thanks in advance!