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Still Banging

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KapeKodK5, Sep 15, 2000.

  1. KapeKodK5

    KapeKodK5 Registered Member

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    I have 1990 k5 with a 4" inch superlift. It runs 35's on 15x10 Ultra's. The rear uses lift blocks. I have lowered the transfercase and lenghtened the Driveshaft. Ever since the truck was lifted, the truck has made a banging noise when under moderate acceleration I believe around 2nd gear. it is a 700r4 tranny. I 1st tried the transfer case drop, then the driveshaft with new u joints and it still bangs. the only other thing mechanically that i did to the truck was change the rear axle fliud when i installed a new rear diff cover. I used the recommended 80w 90 oil. This is driving me crazy and it sounds like something is about to snap. Any ideas would be greatly appreciated!
     
  2. jarheadk5

    jarheadk5 1/2 ton status

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    Check the angle of your t-case output and compare it to the angle of your rear axle drive yoke. They should be within +/- 1 degree of each other (someone correct me if I'm wrong).

    [​IMG] Semper Maintenance!
     
  3. drivelineman

    drivelineman 1/2 ton status

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    sometimes there is a problem with the t case spline grabbing the slip yoke spline and that is what you get- you might try some grease on the spline - this might take care of your problem - jesse -http://www.highangledriveline.prodigybiz.com
     

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