Recent content by Macs Garage

  1. M

    2nd transfer case cracked

    To answer my own question. Front drive shaft slid back and forth by hand easily. When I took it apart it was full of metal slivers and probably binding under load. The shop I am taking it to said they have seen this happen before and it pushes against the transfer case. They will put a used...
  2. M

    2nd transfer case cracked

    99 GMC K2500, 5.7L, 4l80e, np241c. This summer my transfer case broke around the front output shaft when I got stuck pulling my boat out of the lake.i bought a used one and rebuilt it. Now the rebuild one broke while plowing snow in the same place. The front driveshaft u-joint had also thrown a...
  3. M

    4WD HI/LO light blinking

    I have my transfer case apart right now and the shift motor rotates a plate which hits a sensor when engaged. Could it not be turning enough or a bad sensor switch.
  4. M

    97 CMP Offset PID

    I have a 99 k2500 5.7 vortec and didn't need to add any extra PIDs to read the camoffset. Should be 0 plus or minus 2. Are sure the sensor is plugged in?
  5. M

    Rear brake locked up?

    Good eye. I saw that too. I don't know if that is something to worry about or not. Maybe from running low on lube? Part of me hopes I need to get a new one with 4.11 ratio, but would need the front too. The rest of me wants to update my boat.
  6. M

    Rear brake locked up?

    Update: pull the cover of the differential and the oil was brown runny mud looking. After cleaning everything up I didn't notice any teeth damaged or anything. There was metal on the magnet, but I don't know how much is normal (see picture). Diff is 14 bolt 9.5" g80. Haven't had any problems so...
  7. M

    Rear brake locked up?

    Walmart was out of 80/90 and the parts stores were closed.
  8. M

    Rear brake locked up?

    Pulled the brake drum off last night. Was dry inside and but the rear shoe was sticky on the bottom 3" and front a little bit. Otherwise everything looked normal. After cleaning everything off and the brake cleaner evaporated, the rear side of the wheel cylinder was a little wet. I replaced the...
  9. M

    2000 K2500 with FF rear end, brake issue while plowing

    My truck does the same thing when plowing snow. Drive why lightly applying brakes on the street a few blocks and it goes away. I always assume wet brakes.
  10. M

    Rear brake locked up?

    I want to replace the cover. So why take it off now? New one on order with the fill plug. Out of stock most places.
  11. M

    Rear brake locked up?

    Update- 14 bolt 9.5" rear end. Hasn't happened again, but crawled under the truck tonight. Found the fill plug on the cover is homemade. Always has had old oil around it, but now is wet and the bottom of the cover is wet also. I added 20oz of 80/90. I will be ordering a new cover and putting...
  12. M

    2000 2500 CCSB Questions

    My 99 K2500, 5.7L, 245 tires, 3.73 rear end. I wish I had 4.10, but not willing to spend to the money change out front and rear diff.
  13. M

    E15 or E85 Fuel in Vortec Engines

    I had a 97 GMC years ago and ran E85 in it. After few tanks of it the truck died. Took it the the GM dealership and they had to replace the injectors. They couldn't say if the E85 caused, but said not to use it again.
  14. M

    Rear brake locked up?

    (1999 GMC K2500 8 lug 5.7) Went to use the truck and right rear wheel was skipping on road.. If I backed up it was fine, go forward again and still not turning. Went back and forth a few times and it started working. Brakes were replaced last year and don't have many miles on them. Haven't...
  15. M

    School me on relays

    Doesn't the AC compressor also turn on when on defrost?
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