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Old 07-21-2010, 10:29 PM   #1
Kate P
Join Date: Oct 2009
Posts: 53
Default Transmission fluid level appears to be overfilled

After having our transmission serviced at Cummins we recently checked the transmission fluid level and it appears to be significantly overfilled. Does anyone know if this will cause any problem with the transmission until we can get it rechecked.
09 Tourmaster T40-F
Blue Ox, Honda CRV, US Gear Brake System
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Old 07-22-2010, 05:59 AM   #2
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Join Date: Mar 2010
Posts: 161

The motorhome that I just traded had the same situation about a year ago. I had just had the transmission fluid changed, we were traveling on an interstate and stopped at a rest area. As I was walking around the coach, I noticed some fresh fluid underneath it. When I crawled under, I found it was transmission fluid. I panicked, located a Cummins facility in the next town and headed there. If was after hours when we arrived, so we stayed there for the night and the next morning they checked it out. It was determined to be coming out of the breather tube, a result of being overfilled and very hot.

The tech said it wouldn't hurt anything and would settle down as soon as enough ran out. It wouldn't leak all the time, but it did two or three times after that and then nothing. I drove it 5-6,000 miles after that and everything was fine.
2007 Tourmaster T 40 A
Toad - 2011 GMC Sierra 4X4 extended cab
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Old 07-22-2010, 08:52 AM   #3
Arthur Hayes
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Join Date: Dec 2006
Location: St. Augustine
Posts: 164

Read the Allison manual and check your fluid level from the selector panel inside.
Art Hayes
2007 Tour Master T40A
Mercedes Engine
Blue OX Tow Bar
Unified Break System
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