View Full Version : 4 channel in place of a 3 channel

05-07-2012, 03:16 PM
the previous owner of my car swapped a 4 channel rear in place of the 3 channel rear. how hard is it or what is involved in making it work (abs and tc).

05-07-2012, 03:30 PM
Turning a 4 channel into a 3 channel is the harder of the two scenarios. You need the reluctor ring that goes on the differential adjacent to the ring gear. It's my understanding that GM has discontinued this ring. Then you need to drill the hole for the ABS sensor in the top of the housing....UGH. Probably better off looking for a used 3 channel rear and sell yours.
FYI, 3 channel is ABS only
4 channel is ABS and TC.

05-07-2012, 05:48 PM

05-08-2012, 12:47 AM
just to make sure a 4 channel car should have an asr switch on the dash and a 3 channel shouldn't? cause my car has an asr switch. would have to say it is from the factory cause it is plugged in.