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Tcase drop questions

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Leper, Aug 15, 2005.

  1. Leper

    Leper 1/2 ton status

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    Hey all,
    I am dropping my tcase 1" with some box tubing. Is there anything I will need to lengthen/shorten for this? Just looking for any problems or concerns associated with doing this job before I start.
    TIA
    Leper
    BTW 91 Blazer 350/700/241, ft 4" springs and zerorate, rear ORD shackle flip with zero rate.
     
    Last edited: Sep 20, 2005
  2. SkulzNBonz

    SkulzNBonz 1/2 ton status

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    Nope, really simple job.

    John
     
  3. Leper

    Leper 1/2 ton status

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    That's what I wanted to hear!!!
     
  4. rick88blaze

    rick88blaze 1/2 ton status

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    I had to adjust my t-case linkage a little, but other than that, no problems at all.

    Rick
     
  5. BlitzK5

    BlitzK5 1/2 ton status

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    Good question. I was also thinking of doing this with my NP208. But I was wondering would you have to adjust your engine mounts to do this?
     
  6. perp

    perp 1/2 ton status

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    motor mounts will flex plenty for that. no adjustment required.
     
  7. BlitzK5

    BlitzK5 1/2 ton status

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    right on thanks
     
  8. Leper

    Leper 1/2 ton status

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    I came across a site that says not to dop the tcase because of the way it makes the engine sit. Anyone ever have a problem with a drop or know a detailed reason why not to?
     
  9. onlychevy6

    onlychevy6 1/2 ton status

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    on my old 78 blazer i had a 6" suspention lift and kept breaking the rear drive shaft. I was told by the manufacture of the drive shaft to drop my t-case 1 inch and add 6 degree shims in the rear. After i did that. I had better highway driving, and no breakage. I also ran 35" BFG All Terrains with 4.10 gears
     
  10. btolenti

    btolenti 1/2 ton status

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    You could run into problems with the distributor being too close or actually hitting the firewall.....especially if you have the large cap HEI.

    My 1" drop worked fine on my 86 (with the large cap HEI).
     
  11. Jonny-K5

    Jonny-K5 1/2 ton status

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    why not just use the factory 1" spacers? thats what most people do.

    another problem with dropping the T/C is that it puts added stress on the frame where the crossmember mounts. maybe if you used box tubing it would be a little stronger than the factory spacers.ive seen pics of the bolts tearing loose @ the frame from dropped crossmembers.
     
  12. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    That is exactly why. Those stock spacers put too much stress on the frame and cross member. Using tube or something with a larger diameter works a lot better.

    On a side note, that kind of a backwards solution. You are taking away the lift you paid for. Just my experiences, take it as you will.
     
  13. 81jimmyslt

    81jimmyslt 1/2 ton status

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    Yes. When I dropped mine with home made spaces it made the angle of the front shaft worse and it contacting the crossmember slighty. You will also most likely have to adjust your tcase linkage. And your entire drivetrain now rests on an angle, everything shifted harder.

    I took them out.





     
  14. Leper

    Leper 1/2 ton status

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    Thats enough info for me. Not gonna do it. Anyone want to buy some 1" tubing predrilled for dropping a tcase?
     
  15. roadnotca

    roadnotca 3/4 ton status

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    '85 Sub+2", I raised the "W" by taking out the 1" spacers; for more break-over, no problems front or rear. :burb:
     
  16. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    On adjusting the x-fer case linkage: that only applies to the 208/241. The 203/205 do not mount to the floor.
     

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