I have a 1995 blazer LT 4x4 I recently replaced the u joints and still have a vibration in the center to rear only on deceleration though checked dif fluid and replaced still vibrating kinda sounds like a semi jake braking or mudding tires ??? any help is grateful thanks in advance

 

Did you make sure to keep the same orientation of the parts? If the slip yoke is turned 180* to the driveshaft or if the driveshaft is turned 180* to the yoke on the differential, it can cause a vibration. Had this very thing happen on my dad's K2500. I did not take the old u-joints out, just put it back together and dad did not mark anything before taking it apart. Turned the driveshaft 180* to the rear yoke and that did not help. Need to drop the shaft again and twist the slip yoke to the driveshaft.

 

will try with fingers crossed my dad is telling me my pinion bearing could be bad ??
don't know the symtoms though

 

When you changed the fluid did you notice alot of metal flakes in it?

 

no metal shavings but it was black as motor oil