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Old 05-22-2018, 11:51 AM   #15
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25-11 means the output speed reading is zero RPM in first gear. That means the controller thinks the transmission is in first gear and the vehicle's not going anywhere. That is indicative of a C1 or C5 clutch that has failed.
Will the coach go into reverse? Reverse requires C3 and C5. If C5 has failed, you won't have reverse either.
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Old 05-22-2018, 03:31 PM   #16
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Quote:
Originally Posted by dbarton291 View Post
25-11 means the output speed reading is zero RPM in first gear. That means the controller thinks the transmission is in first gear and the vehicle's not going anywhere. That is indicative of a C1 or C5 clutch that has failed.
Will the coach go into reverse? Reverse requires C3 and C5. If C5 has failed, you won't have reverse either.
Yep. He said C5 but that it could also be caused by a bad piston seal---he only mentioned the seal after I told him the fluid looked pretty clean before it was changed recently. Thanks for the confirmation.
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Old 05-22-2018, 03:32 PM   #17
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25-11 means the output speed reading is zero RPM in first gear. That means the controller thinks the transmission is in first gear and the vehicle's not going anywhere. That is indicative of a C1 or C5 clutch that has failed.
Will the coach go into reverse? Reverse requires C3 and C5. If C5 has failed, you won't have reverse either.
no reverse either
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Old 05-22-2018, 03:47 PM   #18
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Good to hear that the estimate didn't make your hair fall out and your gums bleed .
Sitting and drying out , the seals can weld themselves into the mating aluminum and then the first time the clutch pack is activated the seal is torn .

When you get the coach back , drive it often . For your particular failure that's the only prevention .
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Old 05-22-2018, 04:11 PM   #19
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lol. I may have lost a little hair but no gum bleeds.....yet
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Old 05-22-2018, 08:44 PM   #20
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I had to install a reman MD3060 a couple of years ago, burned clutch. Of course it could have been rebuilt but it would cost the same.

It was either do that or abandon ship right there in the parking lot in Montgomery, and that wasn't an option. Sail on.
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Old 05-23-2018, 07:22 AM   #21
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no reverse either
No reverse indicates he was 100% spot on. Glad the estimate wasn't a show stopper. Just out of curiosity, did they quote an Allison ReTran, fixing it in house, or another brand rebuilt transmission assembly?
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Old 05-23-2018, 08:40 AM   #22
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No reverse indicates he was 100% spot on. Glad the estimate wasn't a show stopper. Just out of curiosity, did they quote an Allison ReTran, fixing it in house, or another brand rebuilt transmission assembly?
They gave me two estimates for parts. One was for fixing it, the other was for replacing it. The labor costs were the same. They hadn't opened it up yet at that time. He said that depending on what they find, replacing it would be at my discretion. I didn't ask specifically but I assume they were talking about a rebuild. Not sure if that would be an Allison ReTran. I'll post something when I know more.
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Old 05-23-2018, 09:20 AM   #23
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I had to install a reman MD3060 a couple of years ago, burned clutch. Of course it could have been rebuilt but it would cost the same.

It was either do that or abandon ship right there in the parking lot in Montgomery, and that wasn't an option. Sail on.
yep, that's kind of the same boat I'm in.
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Old 05-23-2018, 10:39 AM   #24
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Please follow up with an ďafter repairĒ post. Interested in the final outcome.
My Allison 3000 has 104,000 on it. Itís working fine, but one never knows whatís down the road.
Thanks.
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Old 06-16-2018, 09:56 AM   #25
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ok, they rebuilt the transmission in house. So far so good.
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Old 10-07-2018, 10:39 AM   #26
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Just lost 3rd MD 3060 in 20k. Not hot, no codes. No ideas.
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Old 10-14-2018, 10:36 AM   #27
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Just lost 3rd MD 3060 in 20k. Not hot, no codes. No ideas.
Cat568,
dbarton291 should be able to give some insight on this. And, tell him I'm helping too through fluid analysis. Give him the story and let's see what he says might be going on.
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Old 10-18-2018, 08:37 AM   #28
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Cat568,
dbarton291 should be able to give some insight on this. And, tell him I'm helping too through fluid analysis. Give him the story and let's see what he says might be going on.
Cat568,
The oil analysis data show a very high level of ultra-fine debris (4-6 micron region) in the filtration system. Since wear metals are low, it's possible that this is either clutch debris or ingested dirt/sand. When were the filters last changed? What filters were installed? It would be nice to have some history on the filter changes if you have that. The analysis also indicates that you're running close to a full load of a TES-295 fluid; so that's good. Overall, there's nothing too remarkable about the fluid and/or transmission in the report except the very high levels of very small debris in the filter system. It's unusually high.

I'd recommend that you check the breather to see if it's clogged. It's on top of the transmission on the rear of the converter housing (see picture). If clogged, it might look like a "dirt clod" on top of the transmission. If you see that, you need to clean it off and probably get a new breather installed. It just threads in to the top of the transmission housing.

Contact me to discuss.
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