2000 Suburban 1500 4x4. At some point in time noticed worse fuel economy and more noise going on underneath. Decided to change the front hub assemblies since we are over 110,000 miles and probably time. Noticed that in 2WD the wheel hubs appear locked as if in "Auto 4WD". With the front jacked up and if you spin the wheel, the front driveshaft and CV spins. Changing to "auto" does nothing different. If you put in 4WD everything locks up like it should. In 2WD shouldn't the wheel spin free? It seems like it is stuck in "auto". What would cause the hubs to not disengage? I don't really know much about how the auto hubs work.

 

Welcome to the forum.

Never got involved w/ the hubs but someone here can probably help.

 

u might try putting it in 4wd..backuping up maybe 4 foot..then pull up a few feet...take it out of 4wd..then back up and pull up a few feet.. then try again.. only thing i can think of..hopefully if this doesnt work..somebody can help..

 

Thanks I will try that. In 2WD the front wheels should spin free correct? Without spinning the axles?

 

they shoudl.. but again i dont know much about the newer vehicals..but my 95 pickup they spin.

 

Funny I don't think of my Suburban as "newer" anymore. It's been through a lot. Pretty rusty underneath.

Anyway, does your '95 have the "auto" 4WD system?

 

well..its newer then mine.. lol and no it doesnt..my mom and dad had a 98 or 99 surb. with the auto 4x4..never had any trouble with the 4x4 system..just the motor! but anyway try that and let us know..

 

I have a 1999 chevy tahoe 4x4 that works the save as your 2000 suburban. The hubs are locked in all
time unlike automatic or manual hubs. I figured this out when i switched from a nisson to a chevy 4x4. if you look closer you will see that the hub assembly is bolted right to the cv axle and cannot possible disengage. I don't really like the design because of fuel economy, but is one less part that can break or need to be replaced. Hope that helps you out.