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Freightliner M2. Medium duty truck.. automatic won’t shift…

Customer Question
Freightliner M2. Medium duty...

Freightliner M2. Medium duty truck.. automatic won’t shift out of second gear?????

Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. The Heavy Truck Mechanic I'm going to connect you with knows all the tricks and shortcuts.

It is a2007 Mercedes engine with a Allyson trans

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

On the road with horses. Can’t get it out of second. Should a unhook the batteries?

Submitted: 9 months ago.Category: Medium and Heavy Trucks
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Customer reply replied 9 months ago
2007 Allyson automatic transmission 6speed
Answered in 1 hour by:
11/9/2017
Technician: Daniel Wilson,
 replied 9 months ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,891
Experience: Owner at DJ Wilson
Verified

Hi my name is***** will be glad to help. To determine if this is internal/mechanical or possible electrical let me know if there are any fault codes. Also check the oil and filter for darkened, burnt, discolored oil indicating an internal failure occurring. Also check inside the filter and pan for metal or debris confirming an internal problem. Let me know the results and if you have any fault codes logged in the transmission TCM.

My goal is to give you the best experience possible! I hope I have earned a 5 star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. If you need more assistance, please use the reply box and let me know.

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Customer reply replied 9 months ago
the code is d1p 07 21
Technician: Daniel Wilson,
 replied 9 months ago

Gen 3 controls correct?

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Technician: Daniel Wilson,
 replied 9 months ago

What is the complete model from the ID tag?

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Technician: Daniel Wilson,
 replied 8 months ago

Hi, Did you get this resolved?

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