What rearend is it? 8 3/4? Dana 60? something else. Did you change the WHOLE thing? brake drum to brake drum? Or remove ONLY the ring gear and pinion gear, and reinstall the stock 2 gears? Sounds like you removed the RING GEAR and PINION GEAR and didn't re-set the backlash, and didn't re-torque the pinion nut.
Tom
"Everyone should believe in something; I believe I'll go fishing."
-Henry David Thoreau
Men and fish are alike. They both get into trouble when they open their mouths
