1999 blazer ls 4x4 hi not engaging?

[offroader2000]

hi folks need a lil help here.for some reason the 4 hi on the blazer is not working this is what i know so far lights on 4 hi work properly when presses,(not continually flasing).the actuator under the battery tray works i can see the servo pulling the cable back but still no engagement,i also here the tccm clicking when i press the 4 hi button so i know thats working ok.so for some reason the front axles r not engaging ?any help is appreciated.ty

[offroader2000]

Originally Posted by offroader2000

hi folks need a lil help here.for some reason the 4 hi on the blazer is not working this is what i know so far lights on 4 hi work properly when presses,(not continually flasing).the actuator under the battery tray works i can see the servo pulling the cable back but still no engagement,i also here the tccm clicking when i press the 4 hi button so i know thats working ok.so for some reason the front axles r not engaging ?any help is appreciated.ty

so no one can help me here????

[aleekat]

Originally Posted by offroader2000

so no one can help me here????

Did you read this?

http://www.automotiveforums.com/vbul...d.php?t=572914

[MT-2500]

233 or 236 transfer case?
Make sure cabel is pulling it all of the way.
In 4W with front end raised up turn front drive shaft and see if a front wheel turns.

[offroader2000]

Originally Posted by MT-2500

233 or 236 transfer case?
Make sure cabel is pulling it all of the way.
In 4W with front end raised up turn front drive shaft and see if a front wheel turns.

just did that seems passenger side wheel will not turn freely plz advise???

[MT-2500]

Originally Posted by offroader2000

just did that seems passenger side wheel will not turn freely plz advise???

233 or 236 transfer case?
Does right side whell just drag or is it locking up?
Try locking one wheel or just jacking up on wheel and turn drive shaft.
IF FRONT AXEL IS LOCKING IN ONE WHEEL SHOULD SPIN WITH DRIVE SHAFT.
When in straight 4W high or low and making a sharp turn can you feel any crow hop or 4W bind up?

[offroader2000]

Originally Posted by MT-2500

233 or 236 transfer case?
Does right side whell just drag or is it locking up?
Try locking one wheel or just jacking up on wheel and turn drive shaft.
IF FRONT AXEL IS LOCKING IN ONE WHEEL SHOULD SPIN WITH DRIVE SHAFT.
When in straight 4W high or low and making a sharp turn can you feel any crow hop or 4W bind up?

all i know it is a 3 button electric transfer case ,when i originally did the test as u advised i was in park should i have been drive.??any ways to be more clear i jacked up the one side of the vehicle put into 4 hi tried to turn the front drive shaft it wouldnt move, i also tried to turn the wheel and it was locked up.

[MT-2500]

Originally Posted by offroader2000

all i know it is a 3 button electric transfer case ,when i originally did the test as u advised i was in park should i have been drive.??any ways to be more clear i jacked up the one side of the vehicle put into 4 hi tried to turn the front drive shaft it would not move, i also tried to turn the wheel and it was locked up.

Ok in 4W with one wheel jacked up and wheel is locked or will not turn the front Axel is locked in.
Also in park and 4W the drive shaft should be locked.
In neutral and 4W but with one or both rear wheels off the ground the drive shaft should spin but may also spin rear drive shaft with it if 4W is locked in 4W high or low.
Try jacking up both front wheels and in 4W and in park and drive shaft locked spin on front wheel and the other wheel should spin the opposite direction if front Axel is locked in.
The best fast way to check 4W is the crow hop test.
Can you feel crow hop on a sharp turn in 4W on dry payment?
If so 4W is working good and front Axel is locking in.

[offroader2000]

Originally Posted by MT-2500

Ok in 4W with one wheel jacked up and wheel is locked or will not turn the front Axel is locked in.
Also in park and 4W the drive shaft should be locked.
In neutral and 4W but with one or both rear wheels off the ground the drive shaft should spin but may also spin rear drive shaft with it if 4W is locked in 4W high or low.
Try jacking up both front wheels and in 4W and in park and drive shaft locked spin on front wheel and the other wheel should spin the opposite direction if front Axel is locked in.
The best fast way to check 4W is the crow hop test.
Can you feel crow hop on a sharp turn in 4W on dry payment?
If so 4W is working good and front Axel is locking in.

ok with both wheels jacked up .in 4 hi and in park,drive shaft locked in front both wheels do not spin at all they are locked as well.

[MT-2500]

Well front axel is locking up.
But also sounds like spider gears are also locked or one wheel is binding up.
Put it back in 2 W and see if right passenger side wheel will spin wheel will spin free.
Also try spinning left side wheel.

In your first post you said front axel is not locking in.
How did you test for that?
Can you get the crow hop in 4W on a sharp turn in 4w drive?

[offroader2000]

Originally Posted by MT-2500

Well front axel is locking up.
But also sounds like spider gears are also locked or one wheel is binding up.
Put it back in 2 W and see if right passenger side wheel will spin wheel will spin free.
Also try spinning left side wheel.

In your first post you said front axel is not locking in.
How did you test for that?
Can you get the crow hop in 4W on a sharp turn in 4w drive?

ok i put bach in 2 w and right passenger wheel does spin free,left side spins free as well. will try the crow hop tommorrow.so first post was a typo i meant locked in.cheers