I have a 91 blazer with the 700r4 and np 241 x-case. I had some transfer case problems a while back and fixed those. Ever since then, my check engine light comes on till I hit about 35 mph, then it goes off and my brake light comes on. The brakes don't work like they should until the brake light comes on. I'm getting the code for the vss. Also, my speedometer bounces and sometimes doesn't work at all. From what I gather, the VSS is for the ABS system. If this is true, will I have any problems with my 3/4 swap next week? I wouldn't mind getting rid of ABS stuff while swapping, it doesn't work anyway. I did a search, but no one had all the same symptoms as I do. Thanks in advance for any help you guys can give me on this.