Recent content by 99GMT425

  1. 9

    NBS/Astro knuckle brake upgrade.

    Yes, Yes, I used the astro hubs, I think the connector is different on 07+, Yes. The hubs will be out the 7/8" on each side, the tie rods will stay the in the same location as stock. You will also need a 17" or bigger wheel and do something about the brake line size difference. I did this swap...
  2. 9

    NBS/Astro knuckle brake upgrade.

    You could try to just get the axles from the local parts store, that way you could return them if they didn't work. The stock gmt400 axles are to short, I used the gmt900 axles because they were long enough to not pull out of the tripod side of the axle.
  3. 9

    NBS/Astro knuckle brake upgrade.

    My 99 suburban, the 2005 astro, and the 08 tahoe all had the wheel speed sensors in the hub. No tone rings on any of the axles. The 2005 asto hub speed sensors (which I'm pretty sure are gmt800 hubs) plug right into my 99 suburban harness. I got used axles from an 08 tahoe that had worn outer...
  4. 9

    NBS/Astro knuckle brake upgrade.

    Sensors are in the hubs and they do work with the gmt400 4wabs system.
  5. 9

    1999 Tahoe NNBS brakes with OEM ABS Module

    I upgraded my front lines to 1/4" in and out of the bpmv. Some of the fittings I replaced and some I just drilled out and chamfered. I feel like there is still a slight delay versus a newer bpmv. If I ever get around to it, it looks like the bpmv off a newer express van has the same ebcm bolt...
  6. 9

    NBS/Astro knuckle brake upgrade.

    The pedal was slightly lower, but felt about the same.
  7. 9

    NBS/Astro knuckle brake upgrade.

    Looks like centric/stoptech is already making the brembo replacement rotors 120.62180 $96.79 and pads 104.19100 63.79 on rockauto.
  8. 9

    NBS/Astro knuckle brake upgrade.

    I think the cooling fins are directional inside the rotors
  9. 9

    NBS/Astro knuckle brake upgrade.

    Pads are 84263246
  10. 9

    NBS/Astro knuckle brake upgrade.

    85263246 pads 84023777 84024778 rotors About $750
  11. 9

    NBS/Astro knuckle brake upgrade.

    Yes my original post was based on the fact that 90-02 awd astro vans used the exact same knuckle as 1500 4wd gmt400 trucks. GM designed the 03 and up astro awd knuckle to bolt in place of the gmt400 knuckle on the astro and use the newer style brakes and hubs. (The location of the ball joint and...
  12. 9

    NBS/Astro knuckle brake upgrade.

    I have not done a 2wd swap but the Astro vans used the 2wd and 4wd knuckles from the gmt400 trucks in the 2wd and and awd applications respectively. I don't see why 2wd Astro knuckles wouldn't swap to a 2wd truck but again I have not tried it. I have only done the awd astro knuckles to a 4wd gmt400.
  13. 9

    NBS/Astro knuckle brake upgrade.

    I did end up using 07-14 front CV axles to make up for the track width. The junk yard hubs have been on there now for 6 years without issue and I do plow snow with this truck. Staying around stock offset is the key to hubs lasting imo.
  14. 9

    NBS/Astro knuckle brake upgrade.

    Didn't seem to be much interest here. I did upgrade to the 2008 tahoe calipers and rotors. I also had to use 08 tahoe front CV shafts. Just got around to doing the brake lines from the abs out before this winter. Going to do the master cylinder with an aftermarket residual pressure valve this...
  15. 9

    NBS/Astro knuckle brake upgrade.

    I have been wanting to do this swap for years and finally the local self serve yard got a 6 lug awd astro van in. When gm upgraded the brakes on the astro van they made a knuckle with gmt800+ style brakes that bolts in place of a gmt400 style knuckle(what the astro previously used). So for $54...
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