Way OT � Getrag Transmission on Dodge Diesel Picku

Also, this forum has some of the best information I have found anywhere on the web. Good people, lots of knowledge, nice interaction.

No doubt within this august group there are a number of Dodge Cummins Diesel owners (fanatics to some), particularly First Generation ('89 thru '93) people. This is our 4th First Generation Dodge Cummins. �Grandpa� has 300K and is still working around the property (though semi-retired).

Anyway, on �New Truck� (a recently acquired �cherry� �92, 250, 4x4, extended cab with 133K), the Getrag 5 speed has started slipping out of 5th gear � usually while decelerating, but occasionally under light load or when re-accelerating. It started a few days ago while pulling a light RV trailer a few miles, but had been fine before. Now it slips out when pulling trailer or not. Slight forward pressure on the shifter will keep it from slipping out, but there is movement in the shifter even then. Once in a great while it does the same thing in reverse or second. I drained the oil and there was a little �gold� dust and some really tiny steel that was attracted to a magnet. The total amount couldn�t have been more than the material in a common office staple ground very fine. The PTO covers / inspection plates had been removed at least once judging from the blue gasket sealer. Opening them didn�t tell me a thing � couldn�t see far enough up and forward to see the 5th / reverse shifters or gears. I refilled with Rotella 15--40 engine oil (though the manual recommends 5�30 � I live in warm climate) and overfilled by one pint. My efforts didn�t make any difference. What next?

Secondly, your Getrag is on it's way out, plan on replaceing it!!! Yes, it can be fixed, but odds are you will be "fixing" it again and again!!! I'm sorry to say, these trannys just aren't up to the task, and are "known" to be a weak poor design!!!

I got fed up with mine, and replaced it myself with a NV4500 that's MUCH stronger, and this one will last behind the Cummins!!! There's kits you can buy so it's a bolt in job.... The NV4500 is what Dodge went to after the Getrag.

And, it's NOT the 5th gear nut someone posted here that's the problem!!!!

Robert

Sounds like the typical driver with there hand constant on the gear shift knob.

The new trannys seam to use a shift fork with brass $tits on the shift fork face that wear off when slight pressure is put on the gear shift.

Pull the tower and see how the shift fork looks.

T_Bone

mud

• Look here

If the transmission mounting bolts are loose (engine-to-bellhousing or transmission-to-bellhousing), and the tranny is moving around under load, that will also cause it to jump out of gear.