my fourwheel drive just went out.......... i think i know whats wrong but maybeyou guys can help


Asked by Dec 26, 2009 at 11:06 PM about the GMC Sierra 2500HD

Question type: Maintenance & Repair

i hear a popping noise which souds like a u joint popping but can be felt under the passenger front floor board....... a soung of ginding gears when taking off in 4 wheel is the closest i can describe the the front axle just plain wont lock in..... i thing that my transfer case isnt pushing the shaft far enough to engage the front axle.....or i have stripped the splines off of one of the front drive shafts

2 Answers


Your passenger side wheel hub is not locking fully. Most likely grease build up or grim. Needs to be taken apart and cleaned.


Depending on the vintage of your truck, I would suspect the front axle engagement actuator. It might not be locking in your front axle all the way. That would be best case and a relatively easy repair. The grinding/popping sounds suggest something slipping that was not meant to slip. Worst case, a broken differential component or like you suspect, an axle component failure. If you're lucky, maybe it's in the outer hub ass'y and won't require a major teardown. Pull the diff fill plug and check for metal in the oil. You might be able to troubleshoot the axle by jacking it up and turning parts by hand with 4x4 engaged and disengaged. Good luck.

Your Answer

Add photo

Related Questions

  • Oil pump or something else please help urgent 19 answers

    I have a 2007 gmc 2500 hd with 6.0 gas engine.oil pressure gage dropped to nothing and alarm went off saying low oil pressure shut off engine.oil is clean and up to leaks or knocking pingin...

    2007 GMC Sierra 2500HD 4 Dr Work Truck Crew Cab 4WD


    Maintenance & Repair

  • I have a 03 gmc Serria 2500hd 4x4 Crew cab with the 6.0 v8 has about 280,000 with regular maintaince. oil pump went out and idk what to do 1 answer

    Thought it was a head gasket so I started it to drive it on the trailer to get it to a mechanic and left it run on the way there probably ran 30 mins to 45 mins and later found out it was the oil...

    2003 GMC Sierra 2500HD 4 Dr SLE 4WD Crew Cab SB HD


    Maintenance & Repair

  • Oil pressure 2 answers

    I have an 02 Duramax that the oil pressure gauge us not reading and I'm thinking that's what's causing my truck not to start. Right before winter I tried to start my truck it started , two seconds ...

    2002 GMC Sierra 2500HD


    Maintenance & Repair

  • 2005 GMC Sierra 2500HD 3 answers

    Does anyone know about how to remove the cabin air filter under the dash on passenger side around HVAC/blower/AC? Also the correct part number of a replacement filter?

    2005 GMC Sierra 2500HD 4 Dr SLE Extended Cab SB HD


    Maintenance & Repair

  • After market Air Intake? 5 answers

    So iv got a 09 GM Sierra 6.0L 2500HD and im looking foe an after market air intake. I want K&N but the dont make one for an 2009!?!? but they do make them for 2008 and 2010... with 08 or 10 fit? Any...

    2009 GMC Sierra 2500HD SLE Ext. Cab LB 4WD


    Car Customization

Search GMC Sierra 2500HD Questions

GMC Sierra 2500HD Experts

#1 jeremyd12
Reputation 110
#1 iEATricers
Reputation 110
#3 Markguidry856
Reputation 100
View All

Related Models For Sale

Used Chevrolet Silverado 2500HD
317 Great Deals out of 27,537 listings starting at $1,250
Used GMC Sierra 1500
808 Great Deals out of 67,795 listings starting at $2,484
Used Ford F-250 Super Duty
337 Great Deals out of 46,815 listings starting at $1,895
Used GMC Sierra 3500HD
57 Great Deals out of 3,841 listings starting at $7,900
Used Dodge Ram 2500
157 Great Deals out of 5,249 listings starting at $2,990
Used Chevrolet Silverado 1500
1,666 Great Deals out of 174,457 listings starting at $1,300
Used Ram 2500
126 Great Deals out of 28,893 listings starting at $7,990
Used Ford F-150
2,211 Great Deals out of 205,389 listings starting at $1,499
Used Ford F-350 Super Duty
405 Great Deals out of 26,383 listings starting at $3,000
Used Chevrolet Silverado 3500HD
115 Great Deals out of 8,986 listings starting at $4,795
Used GMC Sierra 2500
138 listings starting at $4,995
Used Toyota Tundra
441 Great Deals out of 34,121 listings starting at $3,200
Used GMC Sierra 1500HD
7 Great Deals out of 113 listings starting at $2,995
Used GMC Yukon
349 Great Deals out of 17,899 listings starting at $2,950
Used Chevrolet Silverado 2500
6 Great Deals out of 270 listings starting at $3,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.