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Front Driveshaft and exhaust clearance?

Discussion in 'The Garage' started by stockk5, Dec 18, 2004.

  1. stockk5

    stockk5 1/2 ton status Premium Member

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    I just finished putting on the 4" rough country lift. I lowered the tranfer case like they said and now my exhaust and front drive shaft have about the space of 2 or 3cd's tall between them. Is this normal? Will it ever hit when flexing? Thanks Mike
     
  2. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    That is a chevy y-pipe and a lift for you. They can rub, mine did with a 6" lift. This would be a good time to go to a custom exhaust system. :cool: :D
     
  3. cbbr

    cbbr 1 ton status GMOTM Winner

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    I'm having the same problem just mine is rubbing. Called a guy at a local muffler shop and he said that it should be cheap to cut and lower the pipe. Let me know what you do as I have to fix mine soon.
     
  4. Jonny-K5

    Jonny-K5 1/2 ton status

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    it probly will. i've got 3" lift and it rubs under full flex. you can either have a muffler shop make you a new pipe, have them put a dent in it, or buy some thorley headers that come with new pipe that dips down for lifted trucks.

    or just let the shaft rub on it when your flexin.
     
  5. stockk5

    stockk5 1/2 ton status Premium Member

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    argh...hm i know a friend who welds for a living.. and bends tubing all the time. ill prob run it for now then have him make a custom bend there.
     
  6. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    A lot of guys that don't just remove the y-pipe reroute it over the top of the shaft.
     
  7. Jonny-K5

    Jonny-K5 1/2 ton status

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    i remember considering over the top, but i think it looks pretty tight with only 3" of lift.not much room for compression. i'd say your 4" will probly look similar. maybe on a 6-8" lift it would make more sense. what i have seen that looked cool was routing it straight back past the Tcase and over the rear shaft. didnt look like i'd have enough room in my truck for that route but it is something to think about
     
  8. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Mine rubs flexing , I had it tucked up for clearance when stock exhaust replaced , never realizing a couple years later it would rub lifted . I actually rub on my crossmember worse than my exhaust :xmas:
     
  9. cbbr

    cbbr 1 ton status GMOTM Winner

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    THe mechanic that looked at mine recommends routing it above the shaft. Will this cause trouble for the tranny? Seems like a lot of heat close to the tranny pan. Not a bother at highway speed (maybe) but will get hot on the rocks. Anyone done this/had any problems?
     
  10. 4xcrazy

    4xcrazy 3/4 ton status

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    Raise your t-case back up, 4" lift, no need for lowering it.
     
  11. k5floyd

    k5floyd 1/2 ton status

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    bad vibrations is a reason
     
  12. BURBicon

    BURBicon Registered Member

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    if you're gonna rub your y-pipe, do it in private...

    cut of the y-pipe, put a cap on it, and add a complete exhaust system to the other side. My truck had dual exhaust when i got it, but that's probably what i would have done in your situation.
     
  13. cbbr

    cbbr 1 ton status GMOTM Winner

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    Duals running off of the stock manifold or with headers?
     
  14. BURBicon

    BURBicon Registered Member

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    $?

    well that depends on how much money ya' got.
     
  15. Jonny-K5

    Jonny-K5 1/2 ton status

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    i had to lower mine with only 2 1/2" lift. the vibes werent horrible but it definatly wasnt vibe free.

    the shorty driveshafts on blazers are lame. i want to do a SYE and CV joint shaft.


    if you dont smog your truck, go ahead and run duals. if your truck needs to be smogged, it wont even make it onto the machine before they fail it.
     
  16. 4xcrazy

    4xcrazy 3/4 ton status

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    Yeah,my bad, i have a burb, has longer driveshafts, didn't need to do anything with the T-Case.
     
  17. cbbr

    cbbr 1 ton status GMOTM Winner

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    Did you have front driveshaft/y pipe issues with your 4" lift.
     
  18. blackblazer717

    blackblazer717 1/2 ton status

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    ya right 4 inch lift will cause bad vibes from short wheel base man. mine did and i had to lower the t-case and shim the axles so it wouldnt vibrate like hell
     
  19. 4xcrazy

    4xcrazy 3/4 ton status

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    Mine have no issue with clearance, the pipe is really close, and has rubbed alittle, but nothing to extreme to cause any concern with, BTW it is still the stock pipe. I even run with sway bar disco's for that extra travel, still no problems. As far as vibrations, i don't have any problems, but this is probably due to the longer driveshaft of the Burb, the angles are not as harsh as the shorter Blazers.
     
  20. 84_Chevy_K10

    84_Chevy_K10 Banned

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    lowering the transfer case is a bad idea in my opinion.
     

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