Andre1981

Hi there. I am from South Africa and have a Hummer H3 with the 4l60e gearbox. My main problem is that it slips gear in 3rd. All the other gears working perfectly. So i took the valve body off, to go through it. What i did find was that the spring on the 3-2 control valve was broken in half and intertwined with each other. My question is would this be a cause of the 3rd gear slipping? Any help would be greatly appreciate

Regards Andre

MaroonMonsterLS1

no, it would not be the cause of your 3rd gear slip issue

jetech

If you do a pressure check while going for a drive and have normal pressure in 3rd gear it is probably worn/burnt 3rd clutch pack.
3/4 clutch pack failure is a fairly common issue with the 4l60e