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driveline issues

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by cp87jimmy, Mar 19, 2000.

  1. cp87jimmy

    cp87jimmy Registered Member

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    Hello most knowledgable ones, I recently installed a 4" lift kit on my 87 Jimmy consisting of tuff country springs in front and ORD shackle flip in the rear with an add-a-leaf. I had terrible vibrations in the driveline until I lowered the t-case. I still have vibes at about 40 to 55 mph. under load only. It seems as though my rear diff. is in a staight line with my driveline with a severe angle at the t-case. I know I should probably lengthen the d-shaft,but should I consider a cv system since the diff and d-shaft line up? I don't mind spending the money if it corrects my problem. I've heard that the cv joint fails often. Is this true? Should I upgrade too 1 ton units? Any advice would be greatly appreciated from all you guru's. Thanks in advance, Chris

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  2. Depdog

    Depdog 1/2 ton status Author

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    You have 2 choices. You can have a c/v style shaft made, or you can cut off your spring perches and rotate the pinion angle back down to the original specks. The driveshaft is easier, the perches are cheaper. Its your call.

    Depdog

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  3. Corey-88K5

    Corey-88K5 1/2 ton status

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    Actually there are 3 choices. you coudl get a slip yoke elim. kit and longer shaft either being CV or reg. U-joint w/ tilted down pinion. Like Dep said, its your choice. Just a side note, i had a sixstates cv that blew up, and had a local replace it. The cost was less than 1/3 of sixstates. and it was almost all new hardware. The CV was even a better version.

    Corey
    88K5

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  4. Corey-88K5

    Corey-88K5 1/2 ton status

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    Oh, actually, I forgot, I put a 2 or 3 degree shim in the FRONT of the rearend, to tilt the pinion down in my application. Which was a shackle flip & cv shaft. you may want to try that. I don't think you can go any larger than a 3 deg. shim.

    Corey
    88K5

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  5. BlueKnight

    BlueKnight 1/2 ton status

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    I have a 6" lift with a CV joint system. and a lowered transfer case and shimmed diff. The U joints seem to last much longer. But I still have a slight vibe at around 65
     

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