Still Banging

[KapeKodK5]

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!

 

[jarheadk5]

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).

Semper Maintenance!

 

[drivelineman]

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