I have a 89 chevy truck 4x4 CK2500. When I engage the 4 weel drive the front weels will not spin. I supposed to have an automatic locking system but don`t work. Does anybody out there knows how to fix this problem? Should I install the mechanical hubs on it?
IFS 4x4s have a diff actuator in the front diff, GM had some problems with it
May, 18, 2012 AT 7:43 AM
Ck for vacuum at the servo. If u push the servo in does the front hubs lock?
June, 3, 2012 AT 9:13 PM
Read mileage wrong its 73500
June, 3, 2012 AT 10:54 PM
Have u checked the servo yet
July, 13, 2012 AT 12:28 AM
Please help me someone is this an expensive fix
August, 8, 2012 AT 4:24 AM
When u shift to 4wd there is a vac. Servo under the hood. This has a cable that locks the front hubs. Sometimes the little clip from the servo to the cable. The clip brakes at the servo. When you switch to 4wd the servo sucks in and with that broken clip it doesnt pull the cable to lock the front hubs. Just go to the cable. Pull it to lock the hubs use vice grips to hold the
cable. Then test the 4wd. If your truck doesnt have this sys. Mail 2CarPros Jack. My sons had a 84 chevy it had this type sys.I cant see them redisigning a whole different sys. Gl