Ok I just picked up a 3.42 out of a 2000 Z28 for my '95 Z28 with a 2.73.

Now that I get it home and start reading and stuff... I realize I may have a problem to figure out.

Is my ABS incompatible with this rearend? If so is there any way to get it to work?

This is really irritating - can't a man just swap rearends anymore without a hassle... LOL.

 

Does your 95 have traction control? Did the donor 2000 Z28 have traction control?

 

Your ABS is a 3 channel setup where as the 2000 has a 4 channel setup. That's why your ABS is not working. As far as I know there is no way to adapt the two.

 

i dont think thats true...not all late model 4th gen are 4 channel...if the 2000 was abs only and your 95 was abs only they are interchangable

 

Correct.... he keeps posting that. The 98+ F-Bodys are just like the 93-97 cars..... 3-channel for ABS only, 4-channel for TCS/ABS.

 

Well over the last couple days I've figured out 3 ch versus 4 ch. This is a 4 ch rearend I'm trying to put into a 3-ch car. Best I can figure I can either not have ABS, make a reluctor ring and attach it 'somewhere' and make a bracket for the sensor, or drill a hole in the housing of this 4-ch and put a reluctor ring on it's ring gear. I've also read a couple peoples' claims that running the single sensor from my car to one of two sensors from a 4-ch setup will work, but I'm leary as to the differences in reluctor rings.

The latter I'd like to try if I could get my hands on a reluctor ring setup for the 4-ch rear. All I have is the gears, housing and axles.

 

Now that makes sense. I thought the 4 channel was a newer style ABS. Didn't think about the TCS.

Couldn't you just splice into the 4 ch harness to the 3 ch without wiring up the TCS portion? Or does the ABS need to see the TCS to work correctly. I don't much about the TCS system.

 

Well the problem is TCS requires the two rear channels to tell if one of the wheels has lost traction. So, they use the same two sensors, located on each side of the axle, for the ABS. So, the TCS and ABS work off the same two sensors on a 4-ch system.

 

And the number of pulses per revolution is much different between the axle sensors and the diff sensor, simply because of the much larger diameter of the reluctor gear on the differential carrier. Its hard to see how the EBCM would accept as rational a signal that has a mere fraction of the number of pulses per rev..... but who knows.

I've seen a reluctor wheel added to the pinion shaft, behind the yoke, for VSS signal on Jaguar conversions (check the "jagsthatrun.com" website), and for a setup that needed driveshaft rotation info to data log converter slip.

Seems like it would be easiest just to find a rear axle assembly that matches what you already have.

 

What's wrong with the rear axle in your car? If the gears are bad, you could consitter swaping the gears fron the new axle and move the reluctor ring to the new carrier.

I don't know if this is true but I've heard the 98+ axles are longer and won't work with the 93-97 rear brakes.

 

I was thinking about that then I was thinking if two different sized reluctors had two different quantities of teeth on them to offset the difference. Then I got to thinking the number of teeth would need to be the same, only smaller on the smaller reluctor.

There's some physics going on here I haven't the energy at the moment to try and decipher...

 

The reluctor on the carrier is at least 8" diameter and loaded with teeth. I don't know how they could fit that many teeth on the smaller wheel on the axle, but if you have the 4-channel rear, you can count the teeth on the axle reluctor. Here's a 3-channel gear on this carrier (12-bolt carrier, but the wheel matches the stock 10-bolt configuration):

 

Yeah I guess you have a point.

This rearend I have doesn't have rings on the axles. I figured they were somehow mounted between the rotor and hub or something...?

Anybody got a pic of a 4 ch rear with the rings on it?

 

This photo is off of this site:

http://www.hpsalvage.com/specs.htm

 

LOL - this rearend I have has no rings anywhere.

Guess the guy swapped out the axles or the gearset.

I reckon since the housing has no hole for a sensor, he had to have swapped out the axles... eh?