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Chevrolet Repair/1994 chevy full size blazer with 6.5l turbo desil 4 wheel drive problem

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Question
QUESTION: Bout 94 blazer off a guy. It sat for 3 years in is yard. Bought drove 600 miles no problems. Changed oil in rear end and front dif. Drove around dirt road in four wheel drive to get lubed back up worked great. But now I  can go from 4h to 4L an it is tight and works great. But when taking it out and putting it into two wheel and driving it. U can hear it grinding every so often. Does fine if driving slow gas it and it grinds a Little like its trying to kick in or it's not all the way out. Changed the actuator and no luck still does it. But still can stop put into 4h and works fine. Fuse are good everything shows to be working write.

ANSWER: HI ALLEN, GM HAD 2 STYLES OF 4WD ELECTRIC AND FLOOR MOUNTED SHIFT TRANSFER CASE. IF I AM READING THIS CORRECT IT SOUNDS LIKE THE AXLES ARE NOT DISENGAGING FULLY, SUCH AS THE COLLAR THAT IS IN THE FRONT AXLE ASSEMBLY IS NOT PULLING OUT OUT THE WAY TO RELEASE THE AXLES FROM EACH OTHER..POSSIBLE CAUSE IS THAT IT HAS TARNISH ON IT SO THE COLLAR WILL NOT MOVE SMOOTHLY.
TRY OVING IT FROM 4 WHD AND 2 WHD DRIVE 5 TO 6 TIMES AND SEE IF THIS IMPROVES IF SO YOU ARE ON THE RIGHT TRACK. IF NO BETTER YOU WILL NEED TO TAKE THE ACTUATOR OUT AND MANUALLY FREE THIS COLLAR UP ON THE SHAFT SO IT MOVES FREELY....LET ME KNOW HOW THIS GOES..GOOD LUCK TOM..

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QUESTION: It is the floor shift. Will take actuator out and test while plugged in to make sure it is kicking out. If it does how would I free up the inside collar. If not working right should I try a new actuator cause the one I put in was used but just barley. So if collar is good an new actuator not kicking out. I guess I should turn to the indicator switch? The switch on the transfer case that tell actuator to work.

Answer
HI ALLEN,YOU SHOULD BE ABLE TO FEEL THE ACTUATOR WORKING ON THE FRONT AXLE WHEN SOMEONE INSIDE IS MOVING THE LEVER. THE ONLY WAY THE SWITCH WOULD BE BAD IS THAT IT WOULD NEVER SEND A SIGNAL TO THE ACTUATOR..I DID NOT KNOW THAT YOU USED A USED ACTUATOR..ONCE IT IS OUT LOOK AT THE COLLAR AND MAKE SURE IT MOVES FREELY ON THE AXLES..IF NOT SPARY SOME CLEANER ON THE MOVING PARTS TO TRY AND CLEAN IT OFF AS BEST AS POSSIBLE..I WOULD ALSO THINK THE MORE IT IS USED IT WILL GET BETTER AND BETTER...LET ME KNOW HOW IT GOES AND GOOD LUCK TO YOU,,,TOM

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TOM SHEETS

Expertise

PLEASE READ ALL OF THIS BEFORE ASKING ANY QUESTIONS. IF THIS CHEVY SECTION IS MAXED OUT.YOU CAN REACH ME IN THE OLDS/BUICK SECTION. Will answer questions from 6:00am to 10:00pm all days [EST][[[ NO DIESEL OR PAINT QUESTIONS]]] will answer all 1965 to present QUESTIONS ON ALL GM'S on mechanics of these cars. Keep in mind i am not there in person i am going on what you are telling me !! PLEASE IF ASKING A QUESTION GIVE ME AS MUCH INFO AS POSSIBLE. THE MORE THE BETTER. SUCH AS YEAR,MAKE,MODEL,ENGINE SIZE. THIS WILL HELP ME HELP YOU. I will not be able to answer all questions because of some situations that i would really need to be there and see things for myself,such as electrical issues. In many cases i would need wiring diagrams. I can also give you an estimate on what the cost would be at our repair shop as an idea to help you. Keep in mind that my answer is ONLY MY ADVICE,ck with your mechanic as well.. >> THANK YOU, TOM..

Experience

I have been a ASE certified master mechanic for over 30 years and certified IN ALL 8 CATEGORIES,[engine repair,engine performance,auto trans,manual trans,clutches,steering and suspension,brakes,electrical systems,heating and air/cond. I am also a state CERTIFIED inspector for over 30 years. I do computer work [pcm]fault codes,pcm flashing,state inspection monitor readiness,repairs on exhaust,fuel service,[injection and carburetor,] charging system problems, running issues,alignments,frame problems,tire balance,struts and of course standard and anti-lock brakes.

Organizations
nys state auto repair industry and ase group.

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N/A

Education/Credentials
high school,4 years of tech school,and many many hours of auto training with many gm classes and aftermarket training classes..

Awards and Honors
ASE MASTER TECH CERTIFIED IN ALL 8 CATEGORIES.NYS INSP LICENSE AND A/C CERTIFIED

Past/Present Clients
MANY CUSTOMERS IN OUR BUSY SHOP.

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