Zelda
Newbie
All, first forgive the long post and please bear w/ me.
My truck: 1997 K1500 Z71, 3 door, 141" wheelbase, 5.7L, VIN (2GCEK19RXV1207157).
Me: beginning to think I'm an idiot, I'm definitely green behind the ears and could certainly use a well thought out explanation I can follow.
Doing my front end and have hit a snag. I ordered new CV axles from Cardone, part # 66-1050HD. It is a not a reman and it has the thermoplastic outer boot. It also has the ABS tone ring on it. I figured Cardone has been doing refurb/reman CV axles for a long time and when they decided to offer a "new" part that they would have enough experience to build a good one AND the price was right - under $80 each.
My Z71 has ABS. I checked by VIN, says it has "4 wheel ABS" and it also has that ABS manifold (?) under the hood near the master cylinder. I couldn't get a good picture so here's a description.
The ABS thingamabob box has 2 metal lines that enter down low from the master cylinder, one fat, one skinny with a pigtail that runs between them. There are 3 other metal lines up high that run from the ABS box that I'm assuming go to either my calipers or wheel cylinders, 2 are skinny, 1 is fat. So, 5 metal lines 1 electrical connection. I can see that the 2 running from the master cylinder are 1 for front and 1 for rear brakes. I cannot "see" or understand how the other 3 lines serve 4 wheels/brakes????
Years ago, I did see an ABS light on the dash. I ignored it b/c I didn't have the money for a garage to "fix" it and figured I don't need it as I'm an old coot and didn't grow up w/ no high falutin ABS stuff. The light eventually went away, I don't know if the dash bulb for the ABS light went kaput or it "healed" itself (very unlikely as I never feel the ABS shudder under hard braking).
Given that I'm replacing both the CV axles and wheel hubs, I was hoping that the new wheel speed sensor on the new wheel bearing hub would be clean and that it could "sense" or "see" whatever it is that it needs to to send the info to the computer / and or ABS system and bring the ABS back to life. That and one of the wheel bearing hubs is humming under cornering and both my CV axles outer boots are shot.
My original wheel bearing hubs have the wheel speed sensor pigtail. I purchased Timkin wheel bearing hubs w/ the speed sensor (SP550307).
The CV axle I pulled from the truck does NOT have a tone ring on it. I bought the truck used and don't know if it is an OEM part or if it had been changed previously.
The CV axles I ordered from Cardone, according to their product specs, should have a compressed length of 21.0625". Both of the CVs I ordered had a length of approx. 23.5" (I'd installed them to the inner flange w/ the 6 bolts and was moving forward to put the knuckle on the new ball joints and could not due to the incorrect length, that's how I discovered the problem w/ the parts). So, I called Cardone tech help and discussed the issue w/ them. They assured me that the 66-1050HD should fit my 1997 K1500 and should measure at the stated compressed length of 21.0625"s. We both thought it very odd that both new parts, with the correct parts number on the boxes, would be "too long". I'll probably re-order the same Cardone part number and keep my fingers crossed that they come at the correct length.
If the second set is not the correct length I'll have to assume that they don't know what they are doing or there is some kind of spec. mixup as to part #s / application and move on to another vendor as I'm running out of time to get this done and getting a mite bit frustrated. So, I'll get a CV axle of the correct length somehow, someway.
WHAT HAS ME REALLY PUZZLED is the wheel speed sensor location and the need/not need for an ABS tone ring on the CV axle.
The tone ring on the CV axle is on the backside of the knuckle and the wheel speed sensor (on the wheel bearing hub) is on the frontside of the knuckle. I cannot see how on earth that ABS tone ring has anything to do w/ the speed sensor! I obviously don't know how or what the speed sensor is "reading" given that I see no hole on the "female" spline of the wheel bearing hub that would allow the sensor to "see" anything spinning. And of what use is an ABS tone ring behind the knuckle? I don't see anything that is "reading" that tone ring.
I sure don't see a wheel speed sensor line going to the back wheels, just the brake hydraulic line to the wheel cylinders up top and the emergency cable near the bottom of the back of the brake assembly. So, where do the back wheels get/send info to the ABS module / computer that would make this a "4 wheel ABS" model?
Looked at a number of CV axles on RockAuto which confused me even more. Some have no ABS, some are made for 2 wheel ABS (sensors on 2 of 4 wheels) and some are for 4 wheel ABS (sensors on all 4 wheels).
Fellers, what am I missing here? Does my '97 Z71 w/ 4 wheel ABS need CV axles w/ a tone ring in order for the ABS system to work? And, can someone explain to me how or why I have 5 lines running either in or out of the ABS box and how they interact w/ the speed sensors on the wheel bearing hubs and the not-apparant-to-me rear brakes?
Told you I'm beginning to believe I'm an idiot and apologies in advance for such a long winded (and probably confusing) post! I certainly don't mean to abuse my privileges on this terrific forum.
Some insight would be highly appreciated.
My truck: 1997 K1500 Z71, 3 door, 141" wheelbase, 5.7L, VIN (2GCEK19RXV1207157).
Me: beginning to think I'm an idiot, I'm definitely green behind the ears and could certainly use a well thought out explanation I can follow.
Doing my front end and have hit a snag. I ordered new CV axles from Cardone, part # 66-1050HD. It is a not a reman and it has the thermoplastic outer boot. It also has the ABS tone ring on it. I figured Cardone has been doing refurb/reman CV axles for a long time and when they decided to offer a "new" part that they would have enough experience to build a good one AND the price was right - under $80 each.
My Z71 has ABS. I checked by VIN, says it has "4 wheel ABS" and it also has that ABS manifold (?) under the hood near the master cylinder. I couldn't get a good picture so here's a description.
The ABS thingamabob box has 2 metal lines that enter down low from the master cylinder, one fat, one skinny with a pigtail that runs between them. There are 3 other metal lines up high that run from the ABS box that I'm assuming go to either my calipers or wheel cylinders, 2 are skinny, 1 is fat. So, 5 metal lines 1 electrical connection. I can see that the 2 running from the master cylinder are 1 for front and 1 for rear brakes. I cannot "see" or understand how the other 3 lines serve 4 wheels/brakes????
Years ago, I did see an ABS light on the dash. I ignored it b/c I didn't have the money for a garage to "fix" it and figured I don't need it as I'm an old coot and didn't grow up w/ no high falutin ABS stuff. The light eventually went away, I don't know if the dash bulb for the ABS light went kaput or it "healed" itself (very unlikely as I never feel the ABS shudder under hard braking).
Given that I'm replacing both the CV axles and wheel hubs, I was hoping that the new wheel speed sensor on the new wheel bearing hub would be clean and that it could "sense" or "see" whatever it is that it needs to to send the info to the computer / and or ABS system and bring the ABS back to life. That and one of the wheel bearing hubs is humming under cornering and both my CV axles outer boots are shot.
My original wheel bearing hubs have the wheel speed sensor pigtail. I purchased Timkin wheel bearing hubs w/ the speed sensor (SP550307).
The CV axle I pulled from the truck does NOT have a tone ring on it. I bought the truck used and don't know if it is an OEM part or if it had been changed previously.
The CV axles I ordered from Cardone, according to their product specs, should have a compressed length of 21.0625". Both of the CVs I ordered had a length of approx. 23.5" (I'd installed them to the inner flange w/ the 6 bolts and was moving forward to put the knuckle on the new ball joints and could not due to the incorrect length, that's how I discovered the problem w/ the parts). So, I called Cardone tech help and discussed the issue w/ them. They assured me that the 66-1050HD should fit my 1997 K1500 and should measure at the stated compressed length of 21.0625"s. We both thought it very odd that both new parts, with the correct parts number on the boxes, would be "too long". I'll probably re-order the same Cardone part number and keep my fingers crossed that they come at the correct length.
If the second set is not the correct length I'll have to assume that they don't know what they are doing or there is some kind of spec. mixup as to part #s / application and move on to another vendor as I'm running out of time to get this done and getting a mite bit frustrated. So, I'll get a CV axle of the correct length somehow, someway.
WHAT HAS ME REALLY PUZZLED is the wheel speed sensor location and the need/not need for an ABS tone ring on the CV axle.
The tone ring on the CV axle is on the backside of the knuckle and the wheel speed sensor (on the wheel bearing hub) is on the frontside of the knuckle. I cannot see how on earth that ABS tone ring has anything to do w/ the speed sensor! I obviously don't know how or what the speed sensor is "reading" given that I see no hole on the "female" spline of the wheel bearing hub that would allow the sensor to "see" anything spinning. And of what use is an ABS tone ring behind the knuckle? I don't see anything that is "reading" that tone ring.
I sure don't see a wheel speed sensor line going to the back wheels, just the brake hydraulic line to the wheel cylinders up top and the emergency cable near the bottom of the back of the brake assembly. So, where do the back wheels get/send info to the ABS module / computer that would make this a "4 wheel ABS" model?
Looked at a number of CV axles on RockAuto which confused me even more. Some have no ABS, some are made for 2 wheel ABS (sensors on 2 of 4 wheels) and some are for 4 wheel ABS (sensors on all 4 wheels).
Fellers, what am I missing here? Does my '97 Z71 w/ 4 wheel ABS need CV axles w/ a tone ring in order for the ABS system to work? And, can someone explain to me how or why I have 5 lines running either in or out of the ABS box and how they interact w/ the speed sensors on the wheel bearing hubs and the not-apparant-to-me rear brakes?
Told you I'm beginning to believe I'm an idiot and apologies in advance for such a long winded (and probably confusing) post! I certainly don't mean to abuse my privileges on this terrific forum.
Some insight would be highly appreciated.
