Well I have been hearing some rotational squeaking when I drive at low speeds through suburbs so I finally changed the U-joints you know the silverado 1330 ones? My buddy that used to race turbo mustangs told me to run non greasable u-joints less chance of snapping he told me the 1350's was over kill so I did the next best thing and ordered Precission super duty greasable u-joints I felt they would be appropriate for my boosted application we will see!

 

i belive there is truth to running non greasables, reason being is the greaseables have passeges in them for grease to go thru and non are solid...in my lifted k5 blazer on 36" super swampers i had problems breaking the precision greasables.....i went with a spicer non and never broke one since.

 

where they the super strength Precission joints!

 

yes sir they were....u might be ok with them since boost is progessively coming on.....were i was romping thru the mud at full throttle and sometimes yankin bumpers off of fords and dodges that were stuck, so i put them thru hell and broke them.....changed over to spicer joints and never had problems with them

 

thanks for the info I am pretty sure the acdelco sealed units are spicer they look the same!