Change ABS reluctor with gear install?
03-12-2003, 08:24 PM
#3
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My ses light came on. So I had the dealer scan the car and they said it was the speed sensor. So I called Bryan from PCMforless because I got this code after tuning and he asked me if I changed the ABS reluctor when I did my gear change. Anyone have any thoughts on this?
03-13-2003, 06:58 AM
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If you went from 3.42's to 4.10's you shouldn't need a ring. There are only 2 rings... one for 2-series carrier (2.73 gears) and one for 3-series carrier (3.23 and up). Speed sensor is in the transmission and is different than the abs sensor in the axle. Sometimes the speed sensor will come on if you leave it running while sitting still a long time. If the speedo is working than the speed sensor is working.
03-13-2003, 07:08 AM
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Originally posted by 94 NO TOP Z
If you went from 3.42's to 4.10's you shouldn't need a ring. There are only 2 rings... one for 2-series carrier (2.73 gears) and one for 3-series carrier (3.23 and up). Speed sensor is in the transmission and is different than the abs sensor in the axle. Sometimes the speed sensor will come on if you leave it running while sitting still a long time. If the speedo is working than the speed sensor is working.
If you went from 3.42's to 4.10's you shouldn't need a ring. There are only 2 rings... one for 2-series carrier (2.73 gears) and one for 3-series carrier (3.23 and up). Speed sensor is in the transmission and is different than the abs sensor in the axle. Sometimes the speed sensor will come on if you leave it running while sitting still a long time. If the speedo is working than the speed sensor is working.
I stand corrected
Abs pickups are on the axles.
03-13-2003, 09:04 AM
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Originally posted by anaik
A 4 channel ABS (OBD11) wouldn't have a reluctor ring on the carrier, because it was replaced by the individual sensors on each axle, correct?
A 4 channel ABS (OBD11) wouldn't have a reluctor ring on the carrier, because it was replaced by the individual sensors on each axle, correct?
03-13-2003, 09:59 AM
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Okay, I don't know if any of this info will answer your original question, or only confuse the situation, but since I also have a '97 Z M6, you may find my problem interesting 
I recently bought a complete rear axle assembly with 3.73 ratio rear gears in it, that I swapped out for my 3.42 (standard) ratio axle assembly. The problem I'm having is that the 3.73 axle assembly I bought is out of a '94 Formula, (an OBDI car with 3 channel ABS and no Traction Control), and of course, the person I bought it from said it would just "bolt in", right 
Now my '97 Z is/was an original OBDII car, (I did do an OBDI conversion PCM when I installed my cam), with 4 channel ABS and Traction Control 
As soon as I began the axle assembly swap, I noticed the difference in sensor hookups, but did the change anyway. The car is now throwing "ABS In OP, and ASR Off" dash warning lights. What I plan on doing now is changing both the axle tube/ brake caliper mounting flanges, (which have the sensor mounting holes located in them), and the axles themselves, (which have the reluctors pressed on them), back from my old '97 axle assembly. Doing this would allow me to use the 4 channel setup again, (just as it was designed from the factory?), and I'm hoping that this change should take care of my dash lights.
Now the question I would really like answered before I begin swapping axles, is weather or not the axles themselves are indeed fully interchangeable between '94 OBDI and '97 OBDII cars? Other than one set of axles, (i.e. the '97's), having reluctor rings on them, are the axles identical? Same 28 spline and length? If anyone has any info on this I would GREATLY appreciate it
TIA for all replys.
I recently bought a complete rear axle assembly with 3.73 ratio rear gears in it, that I swapped out for my 3.42 (standard) ratio axle assembly. The problem I'm having is that the 3.73 axle assembly I bought is out of a '94 Formula, (an OBDI car with 3 channel ABS and no Traction Control), and of course, the person I bought it from said it would just "bolt in", right Now my '97 Z is/was an original OBDII car, (I did do an OBDI conversion PCM when I installed my cam), with 4 channel ABS and Traction Control As soon as I began the axle assembly swap, I noticed the difference in sensor hookups, but did the change anyway. The car is now throwing "ABS In OP, and ASR Off" dash warning lights. What I plan on doing now is changing both the axle tube/ brake caliper mounting flanges, (which have the sensor mounting holes located in them), and the axles themselves, (which have the reluctors pressed on them), back from my old '97 axle assembly. Doing this would allow me to use the 4 channel setup again, (just as it was designed from the factory?), and I'm hoping that this change should take care of my dash lights.Now the question I would really like answered before I begin swapping axles, is weather or not the axles themselves are indeed fully interchangeable between '94 OBDI and '97 OBDII cars? Other than one set of axles, (i.e. the '97's), having reluctor rings on them, are the axles identical? Same 28 spline and length? If anyone has any info on this I would GREATLY appreciate it
TIA for all replys.
03-13-2003, 10:22 AM
#11
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Hey 97WRAITH, my other brain cell just "kicked in". You said the dealer diagnostic scan said it was a speed sensor problem that caused your SES light to come on, right? Well your axles, (with your 4 channel speed sensors rings on them), would have had to come out during your gear change. Did either of them get DAMAGED during the gear change??? Maybe your gear installer dropped or otherwise damaged one of your reluctors, and hence the SES light. Also check to see that they re-connected the sensor wires to the sensors themselves after the gear change. You MAY have something as simple as a loose sensor wire? Get under your car and visually inspect your reluctor rings and sensors, could be something really simple is wrong down there
03-13-2003, 07:20 PM
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97 WRAITH, okay now things just got a lot "murkier". Yes the sensor on the top of the housing is a speed sensor but only FOR THE THREE(3) CHANNEL ABS system. If you have a '97 Z, (OBDII with the FOUR(4) channel ABS system), you should NOT have a sensor there You should have two(2) wheel speed sensors on your rear axle located out by EACH axle flange. Did you ever have you whole rear end assembly swapped out before for a pre '96 (i.e. OBDI) rear??? I don't understand why your housing has a sensor on top, my '97 doesn't
You should have two(2) wheel speed sensors on your rear axle located out by EACH axle flange. Did you ever have you whole rear end assembly swapped out before for a pre '96 (i.e. OBDI) rear??? I don't understand why your housing has a sensor on top, my '97 doesn't
08-29-2022, 09:39 AM
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Re: Change ABS reluctor with gear install?
I picked this thread up in a search, trying to help someone.
Just to clarify the apparent misunderstanding in this thread, OBD-1 vs. OBD-2 does not determine whether the vehicle has a 4-channel (ABS+TCS) system. Traction control was an OPTION, beginning in 1995 model year. So 1995, 1996, and 1997 can all have either a 3-channel (ABS only) or a 4-channel (ABS+TCS) system.
In the Camaro, traction control is called “ASR”. The option is RPO “NW9”. The F-Body literature (e.g. factory service manual) indicates that TCS was available in 1994 model year, but it appears GM didn’t actually make it available until 1995 model year.
Just to clarify the apparent misunderstanding in this thread, OBD-1 vs. OBD-2 does not determine whether the vehicle has a 4-channel (ABS+TCS) system. Traction control was an OPTION, beginning in 1995 model year. So 1995, 1996, and 1997 can all have either a 3-channel (ABS only) or a 4-channel (ABS+TCS) system.
In the Camaro, traction control is called “ASR”. The option is RPO “NW9”. The F-Body literature (e.g. factory service manual) indicates that TCS was available in 1994 model year, but it appears GM didn’t actually make it available until 1995 model year.
08-29-2022, 11:45 AM
#15
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Re: Change ABS reluctor with gear install?
I picked this thread up in a search, trying to help someone.
Just to clarify the apparent misunderstanding in this thread, OBD-1 vs. OBD-2 does not determine whether the vehicle has a 4-channel (ABS+TCS) system. Traction control was an OPTION, beginning in 1995 model year. So 1995, 1996, and 1997 can all have either a 3-channel (ABS only) or a 4-channel (ABS+TCS) system.
Just to clarify the apparent misunderstanding in this thread, OBD-1 vs. OBD-2 does not determine whether the vehicle has a 4-channel (ABS+TCS) system. Traction control was an OPTION, beginning in 1995 model year. So 1995, 1996, and 1997 can all have either a 3-channel (ABS only) or a 4-channel (ABS+TCS) system.
this thread is almost 20 years old, but, if it will still help someone out, Injuneer is 100% correct here. If I implied that only OBD II cars had four (4) channel wheel speed sensors, well ..... I never meant to do that. As Fred correctly stated (see above) only cars with ABS and TCS came with four (4) channel systems, and could have been either 1995, '96 or '97 model year vehicles, (some of which were OBD I cars).
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