Recent content by Pmcb

  1. Pmcb

    Rear axle replacement

    I came up with 3.42 as well Once I pulled it out to get a full look. If I rebuild can I put a posi in? There is no difference in housing?
  2. Pmcb

    Rear axle replacement

    My other photos are too large to post.
  3. Pmcb

    Rear axle replacement

    Here are some pictures. This truck had a perfect body before the axle came out.
  4. Pmcb

    Lost my rear end.

    The differential is completely trashed, the pinion gear is badly damaged, so I would need a complete rebuild. Axle shaft ends got tore up from bouncing down the road. Bearing will not be a problem, I just wonder about the pinion gear, and I will have to look to see if I can find the shims in...
  5. Pmcb

    Lost my rear end.

    the two things that make me hesitant to rebuild: is there damage to housing, and shimming to get things within thousands. How hard is it really to rebuild? I will be pulling the rear end off tonight so I should be able to see any obvious damage to housing.
  6. Pmcb

    Lost my rear end.

  7. Pmcb

    Lost my rear end.

    I can find several rear ends that figments say are for 1988 GMC Sierra 1500, but online they all say will not fit 1987. What is the difference? Wheel base? They are same gearing 3.42.
  8. Pmcb

    Lost my rear end.

    My rear end gave out last Saturday, driveshaft and wheel slammed my door and went down the road. Now I am having trouble finding a rear end. 1987 GMC Sierra Classic, 4x4, Auto, 5.7l, 3.42 gears. What other options are there? A complete rebuild might be out of my league. Thisn is a daily...
  9. Pmcb

    Rear axle replacement

    That’s a good idea
  10. Pmcb

    Rear axle replacement

    I am really struggling with getting the gear ratio. Nothing on body, doors, glove box…. Cannot turn anything in rear end, looks like the ring is 41, pinion looks to be 15, but this is from eying half way and doubling the number. I could be off a couple either way. If I’m right it is 2.73. If...
  11. Pmcb

    Rear axle replacement

    I final got it home and took a good look. There is a hole in the differential cover, gears broken. Good news the the only other damage is drivers side door. How can I tell what the gearing is so I can replace the entire rear en? I would assume it is original.
  12. Pmcb

    Rear axle replacement

    Thanks for the encouraging words. I think the c clip must have come off, the shaft end still looks pretty good accept for damage bouncing down the road. It did not snap in half, and shows no signs of breaking. The wheel and shaft did hoist the drivers side door and there is a small dent in the...
  13. Pmcb

    Rear axle replacement

    I was driving down the road when I heard a thump in the rear end, slowed and pulled to the side but at about 35mph drivers side rear wheel and axle shaft passed me. I was able to keep truck under control and get to the side of the road. Axle shaft pulled out of both sides. I do not see other...
  14. Pmcb

    Code 24, when going down hill.

    My 87 Sierra 5.7 TBI, is throwing a code 24 when i go down hill. Just got the timing reset, engine is running good. I live in a very hilly area. Not always but maybe 50% of the time i am on a long down hill run it throws a code 24. My speedometer is about 5 mph off, probably from larger...
  15. Pmcb

    Lacking power, 87 Sierra 5.7l TBI

    The lack of power problem solved. As I was looking for vacuumed leaks and wires crossed, I discovered that the U shaped brackets that holds down the distributor had slipped and the distributor moved. I reset the timing let the ECP reset and the power is back, I did replace the O2 sensor. the...
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