4 wheel drive differences?

[ccnova]

I have a 97 2 wheel drive Suburban that I love but being from South Dakota I have been looking at used late 90's 4 wheel drive Yukons/Tahoes for my wife. I have seen 2 different types of "shift" methods on different Yukons/Tahoes. One is a manual floor shift to engage 4 wheel and the other is a push button type. My question is what are the pro's and con's of both? Given the choice what would everyone recommend?
Thanks for the help!
ccnova

[old_master]

Manual shift lever on the floor would be my choice. No TCCM, (Transfer Case Control Module), no encoder motor, (electric shifting motor on transfer case) no switches or wiring to fail....less gadgets, less problems.

[j cAT]

Originally Posted by ccnova

I have a 97 2 wheel drive Suburban that I love but being from South Dakota I have been looking at used late 90's 4 wheel drive Yukons/Tahoes for my wife. I have seen 2 different types of "shift" methods on different Yukons/Tahoes. One is a manual floor shift to engage 4 wheel and the other is a push button type. My question is what are the pro's and con's of both? Given the choice what would everyone recommend?
Thanks for the help!
ccnova

with the auto 4wd which does have more control electrical devices it is better when you do not need constant 4wd operation..the position I always use when it is slippery is the AUTO 4WD position...

this position only locks the front axles together ,,then when the computer detects a slip [you won't] the drive train goes into full 4 WD...then drops out..this saves wear on the componets and saves some fuel..

the weak componet here is the transfercase...this fluid needs replacement every 30,ooomi or the fluid goes bad damaging the clutches and other parts..even if you never use the 4wd this fluid needs to be checked and replaced when it begins to get dark..most never even look at it until it is broke.

I would also get the locker rear diff with the 4WD...