Hummer H2 For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.

Hummer down HELP

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Old Jan 30, 2026 | 01:50 PM
  #1  
EPT_H2's Avatar
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Joined: May 2022
Posts: 2
From: Texas
Default Hummer down HELP

Well I’ve been trying to figure out this problem with my hummer.
The rig drives perfect straight and reverse. Only when I I’m turning it feeling like I have a dragging rear differential the turning radius is god awful.
03 hummer adventure
240k
Kryptonite front suspension
heads
cam
long tube headers
rebuilt transmission
new cv axles
this happened before the front suspension upgrade due to the planetary gear failing on me. Now I haven’t driven the hummer in about six months because I don’t want this to happen again because it does feel like it’s pushing against each other when I turn. again, the turning radius is really really bad but when I go in reverse or forward, the truck doesn’t work. It’s only when I turn. Any help please I wanna drive my truck again

 
Old Jan 31, 2026 | 08:13 AM
  #2  
legerwn's Avatar
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Joined: Apr 2010
Posts: 1,002
From: Deep South Louisiana
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it sounds like your truck may be stuck in 4 high lock,
when in normal 4 high you should not feel any resistance when turning

Neal
 
Old Jan 31, 2026 | 07:24 PM
  #3  
Gavin Costigan's Avatar
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Joined: May 2020
Posts: 619
From: North GA
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Originally Posted by legerwn
it sounds like your truck may be stuck in 4 high lock,
when in normal 4 high you should not feel any resistance when turning

Neal
yep sounds like it’s stuck. Pull the front drive shaft. If the truck drives at all with it out and the T case in 4 hi open then it’s stuck.
 
Old Feb 2, 2026 | 02:18 PM
  #4  
RobertDez's Avatar
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Joined: Feb 2024
Posts: 519
From: Oregon
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Probably needs a new shift encoder.....
 
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