13.6 Inch 2019 Silverado rotor conversion

[Wildblue19]

1 year update, still going strong with 0 issues and about 7,000 miles on them.

 

[Schurkey]

THANKS for this. I must have missed it the first time around. Outstanding blueprints/drawings posted. I shamelessly stole copies on my hard-drive.

Curious how the newer wheels compare to the originals in terms of backspace/offset.

What was the original brake system on the truck? JB5?

The older trucks that had JN3 used different hubs, I suspect but don't know for sure that folks starting with JN3 brakes would first have to upgrade to JN/JB5 hubs to get the rotor spacing correct. And again, the older trucks with RWAL won't have front speed sensors which may/may not be important.

 

[Wildblue19]

THANKS for this. I must have missed it the first time around. Outstanding blueprints/drawings posted. I shamelessly stole copies on my hard-drive.

Curious how the newer wheels compare to the originals in terms of backspace/offset.

What was the original brake system on the truck? JB5?

The older trucks that had JN3 used different hubs, I suspect but don't know for sure that folks starting with JN3 brakes would first have to upgrade to JN/JB5 hubs to get the rotor spacing correct. And again, the older trucks with RWAL won't have front speed sensors which may/may not be important.

My RPO tag is really torn up but I am fairly certain it came as a JB5 setup. Any other external indicators for that system? I have the old calipers buried somewhere that I can find if it's a piston diameter thing.

The link to the specs are Here.

My first trip to the junkyard, I accidentally grabbed a pair of uprights knuckles that didn't have the speed sensor mounting accommodations. It may have been from a PU year where the 4WAL wasn't an option. Other than the missing mounting for the sensor, they appeared identical.

 

[2drXmobb]

So it's just a bracket and ram calipers and rotors?

 

[Supercharged111]

I missed this one too, and the fact OP is local to me.

 

[Schurkey]

My RPO tag is really torn up but I am fairly certain it came as a JB5 setup. Any other external indicators for that system? I have the old calipers buried somewhere that I can find if it's a piston diameter thing.

My concern with the brake option code is only due to the difference in the hubs. The really-crappy JN3 brakes were discontinued in the early '90s--'91, perhaps. JN3 had a single-diaphragm "pancake" booster. The JB5 has a dual-diaphragm booster with much more power.

You must be registered for see images attach

The link to the specs are Here.

Thanks for that.

My first trip to the junkyard, I accidentally grabbed a pair of uprights that were from a pickup of the same year as my burb, but I believe the PUs got the 4 wheel antilock system later. Other than the missing mounting for the sensor, they appeared identical.

Sounds right. The pickups had RWAL through '91. But "uprights" are more of a Mickey Phearson-strut term. You're dealing with "steering knuckles".

 

[Supercharged111]

My concern with the brake option code is only due to the difference in the hubs. The really-crappy JN3 brakes were discontinued in the early '90s--'91, perhaps. JN3 had a single-diaphragm "pancake" booster. The JB5 has a dual-diaphragm booster with much more power.

You must be registered for see images attach

Thanks for that.


Sounds right. The pickups had RWAL through '91. But "uprights" are more of a Mickey Phearson-strut term. You're dealing with "steering knuckles".

So what did 92-95 look like for ABS? I was under the impression 88-95 was RWAL and 96-00 was 3 channel 4 wheel ABS?

 

[Wildblue19]

My concern with the brake option code is only due to the difference in the hubs. The really-crappy JN3 brakes were discontinued in the early '90s--'91, perhaps. JN3 had a single-diaphragm "pancake" booster. The JB5 has a dual-diaphragm booster with much more power.

You must be registered for see images attach

Thanks for that.


Sounds right. The pickups had RWAL through '91. But "uprights" are more of a Mickey Phearson-strut term. You're dealing with "steering knuckles".

My booster is a JB5, helpful clarification for someone else looking to do this. And yes, you're right on the Macpherson terminology, negative crossover from an old occupation. Thanks!

 

[Wildblue19]

So what did 92-95 look like for ABS? I was under the impression 88-95 was RWAL and 96-00 was 3 channel 4 wheel ABS?

This may shine some light on some aspects of your question

 

[Supercharged111]

This may shine some light on some aspects of your question

I know what RWAL is, but Schurkey's post implied to me that 92-95 differed from 88-91. After a cursory glance at your link, I don't see how that's so if it is.