mrmontebuilder
Newbie
My 1994 RCSB Sierra Stepside 5.0l 5 speed has a horrible noise when going from 4hi (never used 4lo so that may too) back to 2wd. Sounds almost like transmission is hitting the floor or one of the drive shafts is disconnected from the differential end and spinning free and banging against the floor or trans tunnel. No noises in either 2wd or 4hi and both seem to drive the proper wheels when engaged. I know trans mount is bad but can't see it causing this issue. I am shifting the t-case in neutral with truck stopped if that matters. I have lots of 4wd/AWD trucks but never had this exact issue. Any thoughts? Also what t-case does this have and it is manual transmission specific?