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4inch lift, and the usual problems.........

Discussion in 'The Garage' started by Jeremy_C, Jul 29, 2002.

  1. Jeremy_C

    Jeremy_C 1/2 ton status

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    Hey all, i've got a 78 chevrolet 350 auto with a 4inch super lift suspension lift. I just threw a driveshaft again. Do I need a longer driveshaft? I already know that i need to tilt the rear-end up some, but do I also need a longer driveshaft? And if I do, does anybody have one for sale /forums/images/icons/laugh.gif

    Also, I need a cheaper way to tilt the rear end, what have you done thats worked? /forums/images/icons/smirk.gif
     
  2. Zeus33rd

    Zeus33rd Smarter than you GMOTM Winner

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    What exactly do you mean by "threw a driveshaft"? Front or rear? /forums/images/icons/confused.gif
     
  3. Jeremy_C

    Jeremy_C 1/2 ton status

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    Oh yea....sorry bout that

    It was the rear driveshaft, it didn't start shaking or anything....It just hit the ground as i was going down the road about 50mph /forums/images/icons/frown.gif
     
  4. Zeus33rd

    Zeus33rd Smarter than you GMOTM Winner

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    What t-case do you have? Did it seperate at the t-case or the pinion? Did the shaft actually pull apart or did a u-joint break? Sorry for the rapid fire questions, just tryin to get an idea about what happened. /forums/images/icons/grin.gif
     
  5. Jeremy_C

    Jeremy_C 1/2 ton status

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    hey no problem on the rapid fire questions, thats fine with me. The u-joint busted i guess, the drive shaft fell out of the tail shaft, and the drive shaft hit the ground. I've not found the tail shaft yet, i'll have to go look at day light.

    Not sure on the T-Case /forums/images/icons/confused.gif
     
  6. jc71355

    jc71355 1/2 ton status

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    Dropping the T-case will probably help your situation.
     
  7. UseYourBlinker

    UseYourBlinker 1 ton status

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    Some people here are running 6" lift with the stock drivelines,and some people needed to extend there driveshafts just for a 3" lift (like me) Every truck is different. It's hard to tell.. /forums/images/icons/smirk.gif
     
  8. Brownjoe

    Brownjoe Registered Member

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    I had my truck lifted and stated to bleed from the rear main seal, but since having my driveshaft extended the bleading stoped, I just hope it dont put added stress on the spoines. /forums/images/icons/smile.gif Happy trails.
     
  9. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Easiest thing to do (and probably one of the cheapest) is to re-install the existing driveshaft, then make a mark on the slipjoint where the two parts currently come together.

    Bring the driveshaft to a local driveshaft shop....they can look at where the mark is, and then they can probably lengthen and re-balance the existing shaft if that's all that's wrong.

    The only other concern though, is if you haven't dealt with pinion angles, you may be running those u-joints at an excessive angle which dramatically reduces their lifespan....if you keep breaking u-joints (even on the street), then you will probably have to cut-and-turn your spring perches, or at least add angle shims to the springpack to reduce those angles.....

    Just a few ideas. /forums/images/icons/smile.gif
     
  10. Jeremy_C

    Jeremy_C 1/2 ton status

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    The shim idea is probably what i am going to do. Do i need a machine shop to make one, or do they actually sell them some where?? /forums/images/icons/smirk.gif
     
  11. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Most spring manufacturers will sell various degrees of shims...Superlift comes to mind, but I'm sure there are others....
     
  12. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I've found 2*, 3* and 4* shims available at a local spring shop. It's not a custom 4x4 shop either...so I'd guess any spring shop should carry them in stock.

    Rene
     
  13. 69K5

    69K5 1/2 ton status

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    do shims make the center spring bolt move out of the perch hole? just wondering?

    nathan
     
  14. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Yeah they do, but the same place sells the small spacer washers that should be used with shims to keep the center bolt far enough into the perch...

    Rene
     
  15. BigBurban350

    BigBurban350 1/2 ton status

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    I have busted 3 driveshafts with my 4 inch lift. I got no angle in the rear because of angled blocks. I just put in a driveshaft loop, and carry around an extra u-joint /forums/images/icons/tongue.gif
     
  16. 94JeepYJ

    94JeepYJ Registered Member

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    Yes, he's right if you drop the Transfer case a few inches the driveshaft will be at less of an angle so you wouldn't break the driveshaft. And getting spacers for the T-Case is cheap!
     
  17. 69K5

    69K5 1/2 ton status

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    how do you get the transfer case dropped. do you just lower the crossmember and let it pivot down?

    nathan
     
  18. Mreetz

    Mreetz 1/2 ton status

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    Yep, just take the existing spacers and move them above the cross member. Worked great on my lift.
     
  19. Jeremy_C

    Jeremy_C 1/2 ton status

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    I lost my tail shaft, so I'm gonna have to get another one. I think my transmission got a hole knocked in it, it was leaking pretty bad. Would the tail shaft have anything to do with it leaking so bad?? /forums/images/icons/confused.gif
     
  20. 94JeepYJ

    94JeepYJ Registered Member

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    Yes it would, but also there are, i think 2 hoses from the transmission to the radiator and you could have punctured one of those.
     

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