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Drivetrain - 2001 - 2010 Discuss front and rear axle, transfer case, brakes, etc. Transmission questions belong in the appropriate transmission forum below. First through fourth generation...

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Old 02-03-2020, 11:01 PM   #1 (permalink)
Dondiesel
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4 wheel drive engagement is rough

Just wondering where to start. Iíve been noticing my 4 wheel drive is engaging rough. Sometimes itís smooth sometimes it bangs into gear. O7 6.6 240k any ideas...

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Last edited by OkDually; 02-04-2020 at 08:20 AM. Reason: prefix
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Old 02-03-2020, 11:58 PM   #2 (permalink)
heymccall
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Are all 4 tires the same rolling diameter?
Also, is there fluid in the transfer case?

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Old 02-04-2020, 07:36 AM   #3 (permalink)
Babin Farms
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Electronic or manual shift? What speeds are you running when engaging? Are you turning at all when engaging?
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Old 02-04-2020, 07:49 AM   #4 (permalink)
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Quote:
Originally Posted by heymccall View Post
Also, is there fluid in the transfer case?
^^^^
If your truck hasn’t had the pump rub fix done you may be out of oil.
If your transfer case oil hasn’t been changed in a while it wouldn’t hurt to put some new oil in.
Maybe this will get moved to (Drivetrain - 2001 - 2010) for more responses.

Last edited by Rvn4me; 02-04-2020 at 07:56 AM.
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Old 02-04-2020, 08:19 AM   #5 (permalink)
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Thread relocated over to "Drivetrain 2001-2010"

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Old 02-04-2020, 09:17 AM   #6 (permalink)
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All the tires are the same size. I’ve been shifting with the electronic switch at slow to no speed going straight. Just did a quick search on how to check the fluid. Do you guys recommend over filling through the speed sensor? Also people are saying use full synthetic 5 -30 because it won’t evaporate.
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Old 02-04-2020, 09:41 AM   #7 (permalink)
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Quote:
Originally Posted by Dondiesel View Post
All the tires are the same size. Iíve been shifting with the electronic switch at slow to no speed going straight. Just did a quick search on how to check the fluid. Do you guys recommend over filling through the speed sensor? Also people are saying use full synthetic 5 -30 because it wonít evaporate.
I fill it to the bottom of the fill hole on the back of the case and use Merchant Auto transfer case fluid, haven't had a problem and my fluid level is the same now as it was about a year ago when I changed it last.
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Old 02-04-2020, 10:08 AM   #8 (permalink)
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I’ve never changed this fluid so I’m figuring I probably should. Drain it fill it till it spills out the fill hole and call it good right? Anyone know how many quarts to fill?
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Old 02-04-2020, 10:26 AM   #9 (permalink)
Babin Farms
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2 qts of Genuine GM Fluid 88900402 Auto Trak II Transfer Case Fluid
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SOLD 2001 Chevy K2500HD Ex-cab LB7
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Chrome DMI
Truxedo Bed Cover
Rebuilt filter head
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New injectors and HG @ 85,000
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Old 02-04-2020, 01:14 PM   #10 (permalink)
Dondiesel
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Ordered it, I’ll let y’all know! Hope it solves the issue! Thanks for the help!

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