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GM transfer case woes

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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
Points: 38923
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    Posted: 19 Jan 2020 at 5:18pm
Well last case I bought didn't work - 2 problems - later electrical hookup was wrong and no way to convert it to fit my truck - then getting it to lock in manually it would not engage . 
So picked up another take out unit and will try that to see if I can get it working . 
Seems GM NP246 - Auto Track 4 button units have a clutch pack that senses off 2 speed sensors in tale shaft housing to control clutch pack pressure . If you use autotrack doing anything but driving on the highway it shortens the life and leads to failure . 

 So this last snow dump I had to borrow sons 1 ton Dodge diesel to do plowing . 
Nice truck to plow with but a $60 T + cost just isn't in the budget for me to move snow . 

Next found out my 2000 GMC 3/4 ton is actually built on 1/2 ton frame and is just a beefed up under carriage and in 2000 the new body style was made up out of extra junk GM had i rush to get new body style in the market with the 6.0 engine .
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2020 at 8:45am
Bit the bullet and opened up my origional case , bad bearing as the retainerin the bearing melted and all the balls went to one side (plastic retainer between balls) then the clutch pack had excessive play. Bought a new bearing and set of clutches and installed them - said to heck with the shim stack height and just put full 10 friction discs and 10 metal plates in and the shim that was in present case . IT WORKS 
 So thanks to Dakota Dave for saying he did his own - so I did also and it wasn't that big of a job as it sounds - after watching several videos and saying the special tool ws needed I found out it could be done without .
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
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chaskaduo View Drop Down
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Joined: 26 Nov 2016
Location: Twin Cities
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Post Options Post Options   Thanks (0) Thanks(0)   Quote chaskaduo Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2020 at 9:19am
Good to hear, now where's that damn snow? Angry
1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp
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