dogfriend
Human-Animal Hybrid
- Joined
- July 22, 2002
- Messages
- 7,556
- Reaction score
- 16
- City, State
- Carmichael, CA
- Year, Model & Trim Level
- '97 Sport 4x4
I took it to AutoZone and the diagnostic hookup found no error codes, not sure if the guy knew what he doing.
He would need to use a scan tool that can scan for GEM codes - if he only can scan the PCM, then it wouldn't give the codes. If you are getting flashing lights, it should set a GEM code
So I'm thinking that I should remove and clean the front and rear speed sensors. To make sure I am after the right thing, is this the rear sensor: Rear Sensor. And is this the shift motor that must be removed in order to access the front sensor (pointers to mounting bolts): Shift Motor
Unfortunately, the links that you gave don't work for me, but I think that if you trace the wires from the harness that plugs into the Transfer Case, you will be able to find the speed sensors easily.
Do I have to worry about any fluid draining out when I pull these items? Will I need to replace any seals? How exactly should I clean the sensors?
I believe that both speed sensors are above the fluid level, but I think that I drained the fluid out anyway. The speed sensors have an o-ring seal. You shouldn't need to replace them, but you might want to replace to avoid leaks later. The sensors have magnets in them, so you would clean them by wiping off any metal which may have collected on them.
A couple other things: I recently replaced the fluid in the transfer case, at this mileage I realize it was way overdue but the fluid was still pretty clean looking. Much cleaner than me after I got Dextron all over my shirt trying to refill the case anyway I have been guilty of NOT putting the vehicle in 4WD every month or so, could something be "stuck" somewhere? Also, I recently traced a problem with the defrost control to a broken vacuum line, are there any vacuum lines that (if they were leaking) could cause these 4WD symptoms?
Thanks very much,
russ
Your 96 has a vacuum disconnect for the front diff - it is possible that a vac leak could cause a problem with engagement of the front diff - I don't know if that would also cause the dash lights to flash.