I just had this repaired on my 93 Blazer yesterday, underneath the battery box there is a vacuum actuater that has probably ruptured and needs to be replaced. It looked like an easy job and only took the shop 1/2 hour start to finish.
Same as the rear.
very very hard
You have to remove the diff cover, then replace with new gasket and refill thru plug.
No it will not, It is all different. Actually yes it will i have to correct you om that i have a 96 blazer same front diff as an s10 and 96 to 03 are the same i just put a 2000 front diff in mine
depends upon the truck, diffrent ratio's were used
The vacuum actuator is either in the fender or under the battery. The actually diff actuator is on the back/bottom of the front diff. Mine (2000 blazer) is under the battery. It sucks to get to. If you check the actuator and it doesn't move at all, check the vacuum, if it's not getting vacuum, check the switch on the top driver's side of the transfer case. It sends vacuum to the actuator. It has three vacuum hoses coming off of it. It costs fifteen dollars at autozone and usually greatly improves the performance of the acuator.
94 and up.
the front diff is not engaging its not the transfer case which is manual the solenoid needs replaced
It sounds like you need a new actuator. there is two things that lock in when you use 4x4. one is the transfer case and the other is the front diff. the front diff is turned on by an actuator. if you have a problem with the actuator the front axles wont lock in. even though the transfer case is engaged.
Raise and support front of vehicle with proper jacks. Unbolt front of driveshaft from diff. Unbolt both axles from differential flanges. Disconnect wiring shift cable and vent hose. Support differential with floor jack. Remove bolts holding diff to the frame. Lower diff on jack. You may need to turn the steering one way or the other for clearance.
it will be the same as the rear diff
it could but is not likely to the transfer case transfers power to the front diff, not the rear