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Old 09-18-2020, 04:04 PM   #6
1976gmc20
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Join Date: May 2015
Location: Montana
Posts: 3,696
Re: Considering a k1500 gmt 400

Oh, I forgot to mention those thermal actuators for the central axle disconnect on the 4wd.

They don't work very well when they work, and then they quit working at all.

Since mine is just a "ranch truck" I just shimmed the end of the actuator to lock the two front half axles together semi-permanently. The ring gear and front driveshaft now turn all the time even in 2wd, just like if you had the front hubs locked in on a solid axle.

They also make a manual cable control kit. The last I checked they were about $160 and claimed an hour or two labor. I figured that was money I didn't need to spend but an advantage is that you would have a 2wd low range option. If I had a nice GMT400 then I would get the cable control.
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Current/past Chevy/GMC trucks:
1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD

Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner
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