Hello to evrey body this is my first post on this board.


Well my truck got 1200 miles on it so I load the jeep on the trailor and off to the woods hunting. I put trans in tow haul mode things are good until I stop for fuel the second time and hear a bad wining noise when trans down shifts. I only hear it on down shift and it changes with the rpms. I was braking pretty hard when it started making noise.


This is my second duramax my 01 torque convertor bolts came out and made a big mess of things. So noises really get me jumping now.


Thanks

You should have watched that allison video that comes with your truck. http://www.dieselplace.com/forum/smileys/Cool.gif According to that video that noise is completely normal. Of course I can't hear it to confirm but I am confident that you don't have anything to worry about.

Test Road,


Welcome to the "Place".


Max,


Video??? What video that comes with the truck???Edited by: SteveNorCal

I got an allison VHS tape with my truck. It explains the functions of the allison, some noises that are normal etc.

Apparently another cost cutting measure, as I did not receive the tape. http://www.dieselplace.com/forum/smileys/Angry.gif

Test Road


Bet you have my noise. Hydro Boost. Allisons don't wine anymore in '04 then they wined in '01. Same gear train, same trans except for a solenoid.


mike

What I do not understand is why it did not start this noise until I had to brake hard making it down shift fast. It is pretty loud not the normal sound at all.

Brakes are tied into the powersteering pump.