89 4wd Grinding in Low

I just purchaced an 89 s10 4.3L 4wd. It runs great but I was initially having issues with the 4wd. From what ive been researching it was 2 separate problems.
1st. Problem, 4wd was intermitant. When pulling on she shift lever into 4hi or low sometimes the lights would activate and sometimes they wouldnt, and sometimes they would go on or off when driving, (used to haul wood out of forest) I checked all the vacuum hoses and found 2 that were cracked. Fixed hoses and 4-hi works great now. (so its not really a prob im having. just used as background to diagnosing my problems)
2nd. Problem. However when shifting into 4low I am having problem. I get it into 4-hi with no prob. stop and put the trans in neutral. Pull the 4x4 shift lever into neutral. Now here is where the problem comes in. Once in neutral on both the transmission and on the transfercase, I get stuck. Attempts to put back into 4-hi or down into 4-low lead to grinding where I can't/dont want to, move the shifter anymore. So I turn off the truck shift the transfercase back to 2wd and restart and all is good.
I have gotten the 4-low to work once or twice with no prob, or occasionally it will go into low just not come out. The guy I bought the truck from explained similar problems, said he never had trouble getting it into low but occasionally couldnt get it out with out turning off. Im thinking maybe the shift linkage might need adjusting. It has a 2" body lift dont know if that would affect anything. Not sure how difficult adjusting the linkage is. Since I really only need 4-hi for mostly snow and some dirt trails, fixing the low if its a major issue isn't that important (just like to have everything workin on it)
Any ideas? Thanks
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Try shifting into four wheel low when your automatic transmission is in park...that should solve the problem.
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go from 4 hi to 4 low with no pause in t-case neutral transmission in neutral no more than 3 mph
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some times this does work. You can also find the sweet spot between about 3 and 5MPH that it will shift easily with tranny in neutral. (even in neutral, tranny passes some power and hence the reason for it to be rolling to help gears mess quickly without clatter) ----------------- The SnoMan www.thesnoman.com
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make sure when you pullit into 4lo, you do it in one quick solid pull all the way past neutral into lo.and yes, tranny in neutral.
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wrote:

Ditto, you do not want to be lazy on this. ----------------- The SnoMan www.thesnoman.com
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As stated before, shifting quickly is the trick, it uses a chain to drive the gears so there will be some chatter from time to time, but if you shift quickly it shouldn't be a problem. I have a full size with a similar set up, putting tranny in neutral makes it easier to shift since it allows things to move some to align better than being in park would. But the trick is to shift quickly. As for it not wanting to come back out, it should come out fairly easy, easier while moving a little. As far as the body lift affecting the linkage, it will affect it some, how hard it would be to adjust I'm not sure, never had to adjust mine since I don't have any body lift on mine. As for the previous problem of 4wd not wanting to work, it's a problem with GMs thermolinear actuator. 4x4 Posi-Lok is a company that sells a kit to convert it to cable operation. I did it to my full size pick up, works great. It was $180 for mine, but well worth it. And allows use of 2wd low anytime you want too.
Gus
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As stated before, shifting quickly is the trick, it uses a chain to drive the gears so there will be some chatter from time to time, but if you shift quickly it shouldn't be a problem. I have a full size with a similar set up, putting tranny in neutral makes it easier to shift since it allows things to move some to align better than being in park would. But the trick is to shift quickly. As for it not wanting to come back out, it should come out fairly easy, easier while moving a little. As far as the body lift affecting the linkage, it will affect it some, how hard it would be to adjust I'm not sure, never had to adjust mine since I don't have any body lift on mine. As for the previous problem of 4wd not wanting to work, it's a problem with GMs thermolinear actuator. 4x4 Posi-Lok is a company that sells a kit to convert it to cable operation. I did it to my full size pick up, works great. It was $180 for mine, but well worth it. And allows use of 2wd low anytime you want too.
Gus
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