Good info Chiefrudy . I did try the 4x4 with the T-Handle on dry pavement for only about 100 feet , does work well . It does make sense that 35 MPH would be a top speed while in 4x4 . That is why I bought the Compass , I wanted a true capable 4 Wheel Drive vehicle , not just a AWD . The owners manual on the Compass is really lacking in explaining it's AWD verses 4x4 functions . Thanks .
Not a problem buddy. I'm new to this forum too but I've had a Jeep for the past 7 years so I share the knowledge when I can.
I think the compass will turn off the 4lock after 35MPG automatically. I'm not sure what the reasons are for it. Maybe to much strain on the dive train at those speeds to have constant power sent to both axles.
But 35 MPH isn't a top speed for all vehicles with AWD/4WD. All kinds of AWD vehicles may feature lower or higher 4lock limits. My uncles Honda SUV has a 4lock that only works up to 20MPH. Also, Now all vehicles with AWD have a 4lock. My company just got 2 new Chevy Express vans for the Techs and they have AWD but no 4lock option.
SUVs/Trucks with a true transfer case really don't have speed limit when it comes to 4Hi. With my Liberty I can shift on the fly into 4HI up to 55MPH but once I'm in 4Hi I can push past 55MPH no problem. I've never really shifted into 4Hi above 35-40MPH but I've driven up to the 50-55MPH in 4Hi. Basic motto is when in 4Hi, Don't drive faster than conditions allow you too.
Explore Jeep Capabilities | 4WD Systems | Jeep
Check out the link above it will explain the different systems with Videos.
You probably have the Freedom Drive 1. Unless you have a compass with the off road package then in that case you have FD2.
I have the Command-Trac system. I know Liberty isn't listed as model to have it on this page but that's b/c I have a KJ Liberty (02 to 07 Models)