have 4lo but not 4hi K3500

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insbroker2

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I have a 1997 K3500 5.7, automatic, 128,000 with a lever transfer case shifter. I have 4 lo but do not have 4hi. I have replaced the front axle actuator and the ball switch on the acuator is working. Any help would be appreciated. Thanks.
 

454cid

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How do you know that you're in 4-low? You can have the transfercase in low, but not have the front end engaged.
 

Solid94

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is your shift linkage messed up? i had the opposite i had 4hi but no 4lo and when i built a new shift linkage bar it shifted into both perfectly
 

insbroker2

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The front wheels pull in lo and the actuator engages when out of axle.
 

insbroker2

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The linkage works fine. I finally found a wiring diagram for this. The 3500 has one more switch and relay according to the diagram, so we are checking those next. Thanks foir the help.
 

93Chevy_1500

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Theres a switch ontop of your T-case. My 93 1500 was doing the same thing. The switch was less than 20$. Easy to fix you can do it in about 10mins. I would bet that what it is.
 

insbroker2

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Problem solved. after tracing every wire, replacing every switch my son the machinist shave 60/1000 off the ball switch and I now have 4wd hi.
 
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