4 wheel drive 1985 questions
 

OK, I have an 85 blazer. Love it. But I got a few questions. I assume I need to be in Neutral to put it into 4 wheel drive etc. Also, is the selector lever mechanical, or electric? What's the max speed limits for 4 hi and low?
I have no RPO in the glove box. Could it be somewhere else? I was wondering what axel ratios these 4X4 autos came with in 1985. Otherwise, I love it!
Oh, one more thing, there is a hugely annoying squeaky rattle coming somewhere from the back. I can't pin point it, but the jack is out, and there doesn't seem to be anything loose. Is this common, or do I have to hunt down the source with a friend?
Obliged,

https://www.pbase.com/wyk/image/105880377/large.jpg
Wes

RE: 4 wheel drive 1985 questions
 

OK, no answers?

RE: 4 wheel drive 1985 questions
 

give it some time man.

4x4 is vaccum actuated

that's about all i know with what you asked except maybe the axle ratios are like 3.43 or 3.42 or somewhere in there

RE: 4 wheel drive 1985 questions
 

Your back window is probably loose...just use electrical tape on the metal inserts. Just don't use too much or the window will not close.

RE: 4 wheel drive 1985 questions
 

Nice looking truck. I like that classic chevy color combo.

RE: 4 wheel drive 1985 questions
 

That's exactly what it was. Yer a badass, too.

OK part two: Will a torsion bar tweak give me 1" more without too many problems? I was thinking of going 2" in back and 1" in front(backs are sagging some).


Wes

RE: 4 wheel drive 1985 questions
 

Park or neutral to go into 4wd and it's mechanical. I don't know for sure but I wouldn't go more than 80/90kms/hr in 4 hi, and crawling in 4 low. My 85 had 4.11's, but take your VIN to a GM dealer and have them run it for more info. Yes it's probably the rear hatch glass rattling. Also how is your rear spare carrier mounted?

edit: Ya you can go 1-1.5", I wouldn't go more than 2". Also would need to get an alignment done afterwards.

RE: 4 wheel drive 1985 questions
 

Yeah, it's da glass. I was thinking if I lofted it 2" or so, I could maybe fit some 31's in there.
My local Gm dealers can't go further back than 1991 on the VIN. Know anyone else I can maybe call and ask?

Obliged,

Wes

RE: 4 wheel drive 1985 questions
 

a 91 would have the same coding i think. otherwise check out lmctruck.com and go to the catalog for s10 blazers

RE: 4 wheel drive 1985 questions
 

4wd high I have been highway speed (55mph) no problems. 4wd low I think 20 mph is max. Shifter is cable actuated along with vacuum operation. Neutral is what gear you should have to shift it into 4wd. I have shifted mine into 4wd after shifting into neutral and still rolling (5mph or so) and it seems to be a LOT easier to shift into 4wd gears, especially 4 low.