So I want to make sure my 4 wheel system is good on my new to me 04 AV. How can you test it in a drive way on road? no warning lights on about the 4 wheel system. When I click it into 4 wheel while in park i can hear something engage.
Be careful with it and don't feel invincible because you now have 4x4. Look for your rear diff code at the glove compartment and see if you have a locked diff. Code I believe is G80. Driving around on dry pavement is not recommended with 4x4 on.
I also agree, try to avoid putting in 4wd on dry pavement, especially turning. Take your AV to a dirt area or other loose surface then put it in 4wd. How many miles does it have and has the drive line been serviced? Look online or in manual for service intervals, changing fluids and filters is cheap insurance and allows you to find small problems before they become large problems.