Auto Trans - Help !

[rrl989]

With 62K miles I've developed a very loud, and noticable whining noise. Sounds like off road tires on the highway, its rpm dependent. If I drop it into neutral, noise is gone. Lock out 4th gear OD noise goes away. No performance of or shift problems, no slipping (Temp reads in normal range). I serviced at 25 & 50K. Fluid looks good. I suspect a problem with this OD unit ?
Is it a major $$$ repair? Should I go to DC or AAmco?

What a shame, I baby this truck. Never towed anything. This may be my 1st and last DC product. I drove to work today in 3rd doing 55 @ 2500 rpm.

Any advice, is this a common DC "slushbox" problem ?????

Thanks, Ron

 

[Dieselnerd]

What year is your truck? Prior to '96 the OD gears were not getting as much oil as they should and tended to overheat and fail.

 

[rrl989]

I have any early 98

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98 3500 QC 4X4 Int Blue, 6BTA5. 9, Auto 3. 54 LSD, PIAA Pro90's, RS9000's, Tonneau, Running Boards, 5K Air Bags, Hadley Air Horns, EGT/Boost/transmission Temp Gauges, Cobra / K40, Valley class V, Bugflector II, Bedliner, Tow Hooks, Cup Smoothie, Meg's turn-down tip, SS Fender Flares... .....

99 Lance 1110 Slide-On Truck Camper

 

[Dieselnerd]

Take it to a certified ATRA shop. If they are ATRA it will be listed in their Yellow Page ad.