Lost overdrive - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 7 (permalink) Old 10-25-2009, 03:54 PM Thread Starter
 
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Lost overdrive

I have lost overdrive on my 2005 chevy 5500 Allison tranny. Any quick fixes or do I look at an overhaul? I have 163000 miles on it.
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post #2 of 7 (permalink) Old 10-25-2009, 05:23 PM
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You say you lost overdrive, is that the only gear?

What other symptoms/conditions? Any check engine light?

Eric Merchant
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post #3 of 7 (permalink) Old 10-25-2009, 05:27 PM Thread Starter
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You say you lost overdrive, is that the only gear?

What other symptoms/conditions? Any check engine light?
No lights. The other gears are fine right now.
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post #4 of 7 (permalink) Old 10-25-2009, 05:49 PM
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May be a code stored. Where are you located?

Eric Merchant
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post #5 of 7 (permalink) Old 10-25-2009, 06:02 PM Thread Starter
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May be a code stored. Where are you located?

I am in Louisville, KY.
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post #6 of 7 (permalink) Old 10-25-2009, 10:59 PM
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If you dont mind a road trip, I am 6 hours N of you. Be more then happy to take a look at it for you.

Eric Merchant
www.Merchant-Automotive.com
Zeeland, MI
1-866-399-7169
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AC Delco Independent Repair Center
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post #7 of 7 (permalink) Old 10-26-2009, 12:40 AM
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Are you sure your tranny isn't stuck in 4th? I had a Duramax do this to me, I think this might be what they call limp mode?

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