Highway Driving in 4 wheel

[VinceY]

I have been told the newer models allow highway driving in 4 wheel drive (if required) with no side effects other than reduced mileage. I have had to in our 2002 Trailblazer every now and then.
How about our 69-72 blazers? Same or what?

[Jimmy72custom]

I don't run mine on just wet pavement or patchy snow, but if the road is covered No problem.

[smokekiki]

The road should be wet at the least for 4x4.

[vtblazer]

I'll run the hubs locked in on the interstate for a short trip and just pull into 4x4 when needed.

Don't think I'd go 65mph in 4wd though, even with snow covered roads.

[FRENCHBLUE72]

Dont try to run in 4wd with a locker in the front diff( I doubt the trail blazer has one)on dry or wet pavement

[LUV2XCLR8]

I have yet to use mine, but thanks for the tips

[Medicanman71]

JEeps with selec trac t cases can like my girls 97 cherokee, there is a dif between the front and rear axle so even if the roads are only slick/raining etc you can shift into it w/e....When you go into 4 lo or 4hi the dif locks the axles together. thats like part time or something, then it also have 4hi , 4lo, and N. The blazers only have 2hi / 4hi/4lo and N .. so i wouldnt drive in either 4hi or lo unless as said the roads were covered in snow or mud heh.

[Huck]

Highway speeds and old 4x4's don't go hand in hand. Newer designs are capable but why would want to do that? You burn more gas, put strain on a bunch of expensive stuff that you don't need to, and quite honestly, a 4x4 running at speed has less driver control then running in 2x4. Only real advantage is braking by downshifting the transmission and even then you can get crazy things to happen---like a broken front axle universal that will probably kill you!!!

[Scrubby]

The part time 4x4 in your blazer is not designed to run in a no slip situation. The road should at least be wet, or you are going to be tearing things up. Now, if you are running on a snow covered, gravel, or similar road, I think you could run in 4 high with no problem at any speed you can safely go. Remember 4x4 doesn't help you stop.

[special-K]

Road-use is fine in 4wd when it is needed.You don`t need it on wet roads,although the reduced traction would be easier on the drivetrain.Like VT Blazer.I just lock the hubs in when there is snow on the roads(the only time I can think I`d need 4wd).With the hubs locked-in,you have "shift-on-fly" between 2hi and 4hi.I use a "conserve drivetrain" approach and try to go as long as I can in 2wd.Remember,there is no harm in running all day long with the hubs in "lock".This is how the system was designed to work and "lock-out" hubs are an afterthought add-on.When the snow gets deep enough and the rear starts trying to push around under power(fish tail)because the fronts are meeting enough resistance,I pull thr lever.When the roads are mostly clear,I pull the lever when I see white on the road,mostly on curves or when it`s drifted.A thin white patch on a straight-away,I just let off the throttle and drift through.