Are there any things to consider if looking at the earlier years....like 96 and 97? Besides mileage...are there any mechanical failures etc that were more common in the first few years of this gen?
Also, do all years have the OBD2 port? I think I read in one of the links that they do, but can anyone verify...
Yes, all have OBDII.
Bought my 96 in 2000 74k mi Totaled 2-18 370k mi. My understanding on head gasket issue is that it would happen sooner rather than later.
The 96-2k's are well designed.
Things you can run across are the Locker and or ADD will not engage properly, 8 out of 10 times this comes from owner not using them. Cycling these systems usually gets them working correctly. All 4x4 3rd gens.
This is based on my research cause I started looking late 2015.
01-02's have two design flaws on them as I see it that can cost you.
TRAC System, ABS System.
Trac Sys: The control module can fail. For now they are available in yards/ebay
$300+- neighborhood. I purchased 01 2-17 with a bad module picked up one on ebay $275 no problems to date.
ABS Sys: Can be a issue dependant on PO maint history,,did they change fluid at service interval as recommended, most don't. Go by color of brake fluid if maint records are vague my 01's were, looked as fluid had been changed during the 198k mi on it.
If you get serious about a 01 02 plan on doing this which I have and do.
The ABS/Master combo is $2k new, used is a crap shoot.
Flush the brake system ASAP, run it say 500 mi flush again another 500 mi again. Then make it function lock dem brakes up on wet streets or dry.
I do the lock up often just like functioning the ADD & Center diff.
This ABS/Master combo has Spools and O-rings in it that get stuck together from lack of use, then when used damage occurs.
So far no problems.