DYING BREED

iTrader: (5)

Ok, ive read all the stickies. I had a burnt up 3ch rear in my 99 TA(surprising huh?). i found a good 4ch rear from a 02 SS m6 car. I know the gears are different and that will be adjusted in tune. My question is instead of looking for 3ch axles and drilling a hole in the case for the sensor, why cant i retune the ecm or bcm or find a bcm from a 4ch car and swap it out so i have abs and add TC? harnesses tend to be the same for all models as its cheaper to produce.

So in theory, i need a TC switch, a 4ch cars bcm, and have it flashed to my VIN or have my tune adjusted instead of living with no abs and having to look for axles and drill into my rear end.
Anyone have any expericence or lead me in the right direction? seems to easy to be possible.. and my old axles are toast...

flame

iTrader: (13)

You would need the whole abs hydraulic unit, brake lines, throttle cable, traction control unit etc
Really not worth the effort, just pull the bulbs out of the gauge cluster and drive on

DYING BREED

iTrader: (5)

There is an actual unit for the traction control? Was hoping it would be possible to program or swap bcm. Guess I will be looking for a good 3ch unit. Is it a year difference or option difference? My friends 00 has 3 ch and traction control.

LopeyZ

iTrader: (2)

You should be able to use the 4 channel rear but you would need to swap the brake lines across from your 3 channel. Then in order to run ABS, you could either find a 4 channel harness (I have one) or extend your 3 channel harness to the drivers side speed sensor. Not sure anybody has done this but it should work. If it was my car... Id just find a 3 channel rear.

I don't think you can really go from 3 channel to 4 channel very easily though without tons of wiring. It all depends on whether or not GM uses the same wiring harness for 3 and 4 channel cars. I know they differ some but to what extent I'm not sure. Plus like mentioned above, you would need a 4 channel EBCM, route a brake line from the engine bay to the rear axle!, traction control computer (one under the dash), traction control module plus all the throttle cables. I have most of this stuff if you really want to give it a try though.

ABS and traction control are not at all tied to the PCM either in the sense you can tune it.

flame

iTrader: (13)

If it has traction control its 4 ch, no tc 3ch

JOHNNY59

iTrader: (398)

I have a 3-channel with about 1500 miles since being rebuilt with a new HD Eaton posi unit, new 3:23 gears and bearings. but location is eastern, Pa.

DYING BREED

iTrader: (5)

yeah guess ill be using no abs until i find another 3ch rear. got good deal on a low mi unit only reason i used it, mine was trash.