My 2000 dually does this as well. It was barely noticable with the stock clutch(made it 150k). With the SB Con FE it makes quite the racket. Typically 14-1700rpm range and mainly in 4th gear, sometimes 3rd very very slight and only for a split second. Increases with engine load and throttle input. New U-joints last year but prior to tranny r/r. Maybe the installer trashed the u-joints or carrier bearing. I'm due to change rear diff oil this season. I will report back if anything is found or fixed.
Not sure if something else has changed with the new clutch install but a local tranny guy(not the installer) said it sounds "loose". I asked him to expound and he replied with, ..."sounds loose".haha. No big deal according to him, said it looks like I got a good one(NV4500 that is) when asked about the notchiness and noise. Who knows, run her til she blows.
@1st Gen: what are your typical shift point on the 3/4 split?
Not sure if something else has changed with the new clutch install but a local tranny guy(not the installer) said it sounds "loose". I asked him to expound and he replied with, ..."sounds loose".haha. No big deal according to him, said it looks like I got a good one(NV4500 that is) when asked about the notchiness and noise. Who knows, run her til she blows.
@1st Gen: what are your typical shift point on the 3/4 split?