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Weird Hummer H3 Problem

Acer4LO

Well-Known Member
Messages
801
Location
Illinois
Okay this is a weird one guys. Not sure if this has been covered before because I couldn't find any thing when I searched for it. So a family member of mine is now daily driving my 2006 H3 Non-Adv Lux and has been complaing that the truck has been driving strangely. I went to drive it to see what they were talking about and it seems that truck looses throttle power when you turn the wheel, very simular to when you are in 4HI. The problem is that the truck is in its regular 4WD drive mode not 4HI. Also when you make a sharp turn the rear wheels seem to make a tire skidding noise very simular to if you were to have your diff lock on in the street and attempt a turn. But again this 2006 H3 dosen't have the adventure package so it can't accidently be turned on somehow. Any out there have a similar problem before? I am really sure how to approach this and start looking for things that might be wrong. Not really sure how this problem began. I have never ran into this issue when this H3 was my primary rig that I would daily drive and take offroad.

A few more details I can give is that it is Not a tire rubbing issue. It just has 285/75/16 Duratracs on the stock suspension. No T-Bar crank or anything. Also the rear diff fluid was changed last year in case that helps.
 

atvspeed4

Well-Known Member
Messages
1,214
Location
massachusetts
Did you replace the shift fork recently? Lights can be normal on indicator and worn shift fork or collar allow collar to slide and lock center diff with no warning lights. It's happened to several of our h3s now
 

alrock

El Diablo
Staff member
Messages
10,677
Location
Scottsdale
:yeahthat. And double check that the buttons are not stuck. It is very likely a worn shift fork and you're stuck in 4 Hi Lock.
 

Traxx

Well-Known Member
Messages
682
Location
PNW
Sounds very shift forky. Thanks to the GM bean counters for a tedious job over a 20$ part.
 

Acer4LO

Well-Known Member
Messages
801
Location
Illinois
Thanks guys! 95% percent sure that this is problem, just didn't know what to type in on H4O or google in order to find it. I know I have read about this before but I just didn't know that these were the exact symptoms. I am going to include the word shift fork in the title of this post to link it to other threads. Also do you guys know if this is a common problem for early 2008 model adventure package alphas? Curious to see if I am going to have face this problem some time in the future.
 

atvspeed4

Well-Known Member
Messages
1,214
Location
massachusetts
Thanks guys! 95% percent sure that this is problem, just didn't know what to type in on H4O or google in order to find it. I know I have read about this before but I just didn't know that these were the exact symptoms. I am going to include the word shift fork in the title of this post to link it to other threads. Also do you guys know if this is a common problem for early 2008 model adventure package alphas? Curious to see if I am going to have face this problem some time in the future.

It does not make a difference what year it was. All years were potential to have a plastic shifter fork. My alpha had one and I know of at least one 2009 that confirmed as well. If you plan on wheeling I would split the T-case and check everything out in there and maybe swap the chain.
 

4speedfunk

Well-Known Member
Messages
4,250
Location
Tardville
Sometimes the chain snubber comes loose (on 08-up models). It’s a small aluminum plate inside the t-case, and it can bounce around inside and get ground into dust. This clogs the screen on the pump and starves the case from fluid. Check your t-case fluid. Look for glitter in it. If so...time to pull it for an inspection.
 

06 H3

a.k.a. "The Jackal"
Messages
9,506
Location
Meridian, ID
I can’t believe how many shift fork problems I hear about. I’ve literally broken and destroyed just about every damn thing...but I’ve never had a shift fork issue or an electric shifting issue.

It certainly does sound like a shift fork...they aren’t too bad to replace. Just observe how it all comes apart so you put it back together the same way
 
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