4wd low range half works

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4wd low range half works

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Chevrolet >> Chevy Trucks, Vans & SUV's >> Suburban >> 4wd low range half works

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4wd low range half works - 11/12/2007 11:10:08 PM

nvexplorer

Posts: 3
Joined: 11/12/2007
Status: offline

I have a 93 Suburban 2500 7.4L. For the past few months the 4wd low will engage the low gears to the rear wheels but does not engage the front wheels, which gives me 2wd low range. The 4hi works just fine every time I use it though. The indicator light also comes on at the appropriate times for both hi and low 4wd. Here is a list of the symptoms I've encountered while driving:

4-Low sometimes pops out of gear
4-Low can be kept in gear by pushing on selection lever in cab
4-High does not pop out of gear
4-Low does give low range gears but...
4-Low SOMETIMES is not in 4 wheel drive (2 wheel drive low)
4-Low Indicator light works fine
4-High indicator light works fine
4-High works normally without problem

Can anybody tell me why this is happening and possibly a part number so I can fix this?

Thanks!

< Message edited by nvexplorer -- 11/12/2007 11:16:46 PM >

Post #: 1

RE: 4wd low range half works - 11/17/2007 12:12:36 PM

nvexplorer

Posts: 3
Joined: 11/12/2007
Status: offline

Any suggestions at all? How about another forum to post on?

(in reply to nvexplorer)

Post #: 2

RE: 4wd low range half works - 11/17/2007 4:29:36 PM

MalibuMaxxSS

Posts: 598
Joined: 11/18/2006
Status: online

is it manual shift....maybe its not going back all the way linkage?.....or is it push button?........are you stopped or going VERY slow and no toruque to the engine when shifting to 4 low......only other would be a sensor....but being 93 dont know, cant remeber that far back.....

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2006 Malibu Maxx SS, computer Flashed, undercar LED, Cold air intake, 18' Potenzas, Limo tint front to back

1990 YJ Lifted Locked and always muddy, posi loc, 33s TSLs, weber carb. drop tailgate...

(in reply to nvexplorer)

Post #: 3

RE: 4wd low range half works - 11/17/2007 6:04:20 PM

nvexplorer

Posts: 3
Joined: 11/12/2007
Status: offline

It is manual sift. When we shift into 4 low the truck is always in neutral and stopped. 4high doesn't care whether we're moving, stopped, or in or out of neutral. I'm not totally sure about this, but I do believe there are two 4 wheel drive actuators, one on the front diff and one on the transfer case. Both must be working at least most of the time because we get 4 wheel drive high and we get the low gearing but not the front wheels. I wish I knew more about the 4wd system on these.

(in reply to MalibuMaxxSS)

Post #: 4

RE: 4wd low range half works - 11/19/2007 1:34:55 PM

candycane184

Posts: 3
Joined: 11/19/2007
Status: offline

hi guys!

(in reply to nvexplorer)

Post #: 5