Dorman 600-604 Transfer Case Shift Fork Compatible with Select Hummer Models

While rebuilding my transfer case for H3 hummer noticed that the original fork was worn and not working properly allowing transfer case to shift between gears. Replaced with new fork and now transfer case works great. Exact fit and easy to install.

Early 2007 had the plastic shift fork still, late 2007 got the metal fork. This replacement fit and worked on an early 2007 H3 Hummer, no issues, 4x4 modes all work flawless.

Fixed the problem of being in 4wd all the time. Plastic fork was worn bad in mine. Not too bad of a job to do without a lift, you can use a properly rigged tie-down strap to lower/raise the t-case, the assy is only about 70lbs. I also found that you don't have to remove "timed" gears, chain etc to replace this fork, just pull up on shaft this fork slides on, remove the old one in between the chain and reverse order install the new fork. Also when splitting the case halves make yourself a stand with some 2x4's and support the t-case with tail housing up. Don't split the case with it laying on it's side or you'll have gears fall out etc. There are some great videos on youtube so watch ALL of these before you attempt the repair.

Fit perfect . Much better than the original plastic one!! Cost less than any of the seals and filter that I replaced. Was delivered the next day. Works perfectly now!

This product replaces a plastic piece that wore out. Once this plastic part wears out it make a loud banging/skipping noise coming from the transfer case. Replace with this aluminum part and will fix the problem.

I am rebuilding an h3 transfer case before installing, no existing issues with the plastic fork but just doing some preventative maintenance. Upon installation the gears were not fully seating. Further inspection revealed the arms of this fork appear to be bent down causing the gear to angle. Can anyone tell me if the arms in their Dorman part are perfectly straight like the plastic oem part? Trying to figure out if I just got a bad part and should just order a replacement. I will update my review if I figure out what is going on.Update: I contacted Dorman with the pictures, they confirmed they were warped with no further efforts to fix the problem. Research on the hummer forums showed others have had a similar warped arm issue. I also found that gm makes an upgraded aluminum fork part number 19180438 for a few bucks more which I ordered but have not received yet...... but am hopeful it will have gone through some sort of quality check.Update 2. Gm part is higher quality die cast, arms are nice and straight. Also the bore is clean of burrs and rides freely on shaft. Highly recommend to go with the gm aluminum part for any rebuild or to fix a worn plastic arm.

Needed this for my 2006 hummer h3 , it originally had the plastic fork that wore out and was locking the front , the repair was a pain but was done by me and a freind in my drive way in a few hours , the hummer drives and turns 100 times better now thats its not stuck in 4 wheel drive high locked.

Fit Hummer H3 as expected.