Need to know the correct front differential for a 2001 AWD Eddie Bauer Ford Expediton
Has a Triton 5.4 V8
Ok Ill try to sum up my situation, and what Ive done the best I can.
Bought it from a dealer "as is". When I checked it out it ran great, rhode great. I made one critical mistake. Before I bought it I didnt realize there was no front drive shaft. I didnt look for it cuz I just assumed it would be there. So I purchased one and installed it. After I installed it I get whining sound from the front end when I make turns both ways. Seems to be fine straight away at all speeds. So I took a mechanic for a ride in it and he told me it was the front differential. So I got a junkyard front differential and swapped them out. It still does the same thing with the new used differential. So.. Im thinking this....
1.)Maybe I have the wrong differential? The ford dealership told me that it calls for a 3.55 non vacume shift. I think I confirmed the non vacum part because I have no vacum soinoids, or evidence of them ever being there before next to the battery box. It hasn't sat right with me because the clowns I bought it from I have no idea what they did. I know they replaced the rear drive shaft (still has chalk numbers from the junkyard.) Im thinking they put the front drive shaft in, heard the noise, pulled it back out, and sold it anyways. I cant be sure if they swapped differentials, and if maybe they put the wrong one back in.
2.) maybe I have the correct front differential from the junkyard, but Ive heard that junkyard parts are'nt always reliable. So maybe I got a faulty one. If thats the case I might send it out and have it rebuilt that way I know it will be fine.
3.) From looking on this forum I learned it could be 2 bad front wheel bearings creating drag when i make turns. I havent checked this yet.
But before I pursue this any further Id like to at least confirm which front differential I need. For the time being I removed the front drive shaft again and the thing runs perfectly as a 2WD Ford Expedition:)
Thanks for taking the time to read all that and appreciate any suggestions