| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | If it only whines in 5th, which is an indirect gear, one needs to look at the bearings that are active in that gear. If the pilot bearing on the input shaft has lot of runout, the countershaft will propagate that runout to everything else. What kind of operation caused the pilot bearing to be worn that way-seating the trans by tightening the mounting bolts with the trans not lined up carefully, not using guide bolts, will broach a groove in it.
Hard to tell if that was the cause of whining, will never know unless putting it back in.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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