My boss just got a 88 silverado, and the 4 wheel drive doesn't want to engage. It tries, and the light blinks on and off, and will sometimes stay engaged for a few mins, then back off it goes. I'm sure this couldn't be good for the transmission, so we were wondering what we could look at to possibly fix this. I'm thinking maybe a short somewhere, but i don't know where to look.

Also, when you rev the engine up, LOTS of oil shoots out the exhaust, I'm thinking bad rings, but it doesn't smoke at all, so am I wrong? Thanks.

oooooooops, sorry, didn't see til after i posted, i posted in the wrong forum, please delete.