Reddit reviews Dorman 600-500 Transfer Case Switch for Select Chevrolet / GMC / Oldsmobile Models
We found 1 Reddit comments about Dorman 600-500 Transfer Case Switch for Select Chevrolet / GMC / Oldsmobile Models. Here are the top ones, ranked by their Reddit score.
Direct replacement - this 4WD switch matches the fit and function of the original switch on specific vehicle applicationsEffective fix - restores proper 4WD operation after original switch degrades and failsDurable construction - built for reliable longevity, free of defects in materials and craftmanshipTrustworthy quality - backed by team of designers and engineers in the United StatesEnsure fit – to make sure this part fits your exact vehicle, input your make, model and trim level into the Amazon Garage
Well that stupid bulb is an expensive fuck for how delicate it is. I tried a cheaper ($40) one and it didn't work once, it tried to actuate and the plate that's supposed to do the pulling just went C-shaped. The decent ones cost about $80, but I haven't tried any of them. There's a kit to convert it to a pull-cable setup where you push the button to get the t-case to select gear, and then pullcable engage the diff yourself. Or you can get one of these guys and rig it up yourself somehow.
I'm not entirely up to speed on how the whole system works but the bulb is a common point of failure, or the switch that sits on the t-case itself. Which is this guy. If that fails, it'll suck ATF into the vacuum system that controls the front diff engagement, which can tear up the bulb.
Here's a good post that has some more info on the 4WD system, and also a possible mystery vacuum hose you may or may not have loose.