MD 3060 Hardshift 1-2 and sluggish in others


S

shah

New Member
I have a 94 Allegro pusher with 5.9 Cummins and MD 3060. last month when I was coming back from Florida I noticed the trany hard shifts up and down between first and second shift and engine revs up and then down in other gears. I'm not getting any codes other than OL OK. Can you point me to what the problme might be. Thank you.
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

First thing to do is check the oil itself. See how the color is and if it has a burnt smell to it. If the oil level and condition is good, its possible it could be a leaking or stuck solonoid. Their was an update in '95 on the solonoids. It may be working fine electonically but not hydraulically. It is also possible a clutch could be starting to go. Do you notice any slipping? Is this the original trans?
Lets start their, and see what you come up with....
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

50K miles. It is the original trans and no work or passed problems. Thanks
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

The color is dark(almost black). I can't smell burnt oil. Level is OK. I guess the soloniod would have to be tested at a shop. Other than the slmming of 1 to 2, I see the engine reving up and the gear change and revs back down. Is that the same as slippage? and yes. It is the orioginal trans.
If it is a cluch, how much should I be expecting the spend on a fix?

Thanks
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

shah - 5/17/2010 9:07 AM

The color is dark(almost black). I can't smell burnt oil. Level is OK. I guess the soloniod would have to be tested at a shop. Other than the slmming of 1 to 2, I see the engine reving up and the gear change and revs back down. Is that the same as slippage? and yes. It is the orioginal trans.
If it is a cluch, how much should I be expecting the spend on a fix?

Thanks
Click to expand...

Does it rev up DURING the gear change? Kind of like revving in neutral just for a second or two?
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

Yes. That's exactly what it looks like and then the needle comes back down as the gear changes.
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

Whatcha think there Allison Expert? Dark fluid, flaring 1-2, slamming into second, no codes.

I'm leaving in the morning for Taiwan and then on to China again. So, I may not be on for a while.


Where are you located, Shah?
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

Well, I'm thinking a clutch is getting close to being toast. Even though their is no codes now, there will be soon. If a code comes up, it will probably be a 54-12 or 56-22..You could also see a 25-11....The fact that the fluid is dark in color and it is shifting hard makes me think one of the clutch packs is starting to go.

How about that dbarton? Do you agree?
Hope this helps shah....Oh, you also asked about cost....A basic overhaul would run in the neighborhood of 3,000 to 3,500...
 
Re: MD 3060 Hardshift 1-2 and sluggish in others

Allison Expert - 5/18/2010 12:44 AM

Well, I'm thinking a clutch is getting close to being toast. Even though their is no codes now, there will be soon. If a code comes up, it will probably be a 54-12 or 56-22..You could also see a 25-11....The fact that the fluid is dark in color and it is shifting hard makes me think one of the clutch packs is starting to go.

How about that dbarton? Do you agree?
Hope this helps shah....Oh, you also asked about cost....A basic overhaul would run in the neighborhood of 3,000 to 3,500...
Click to expand...

Yup, I agree it sure sounds that way.

Shah: If you don't know where they are already, you can go to www.allisontransmission.com and click on the service locator to find the closest Allison authorized overhaul facility. I would get it looked at to see if there's debris in the filters and laying on the control module.
 
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