4x4 acting funny - Ford Powerstroke Diesel Forum
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Old 12-29-2012, 08:58 PM
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4x4 acting funny

so today we got some snow and we all went out to have some fun. found a nice steep hill to climb put it in 4wd hi started to go up the hill and it didnt feel like it was in at all just my back wheels were spinning would come down the hill and drive a foot and it felt like it would engage again driving around it was fine. getting on it it was in 4wd no sliding around or anything. didnt lock the hubs had my center caps on my rims. heat was fine the entire time didnt stop blowing or start from the defroster. so i parked and tried to spin the front driveshaft and it was locked in. put it back in 2wd and the front driveshaft would spin fine. used 4x4 last winter once and once in the summer went to diesel nationals and raced but i locked the hubs when i put it in 4wd. really confused was thinking i just have to drive and use the 4wd more often just a little funky because it hasnt been used in awhile. any thoughts?
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Old 12-29-2012, 09:28 PM
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Check the 4x4 vacuum soleniod on the passenger side fender well just behind the battery. When you turn the 4x4 to high you should have about 15" of vacuum on the bottom port for about 45 seconds then it shuts off and goes to 0". If you dont have vacuum out of the soleniod check and make sure you have power and ground to the soleniod if you do replace the solenoid. Also if you have a scanner to test the 4x4 system and you get codes P1876 or P1873 in the 4x4 system the solenoid needs replaced.
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