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Wayne
Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 8427
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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It won't shift into low range. Transmission is stuck in high

Customer Question

it won't shift into low range. Transmission is stuck in high range
JA: What's the make/model/year of your truck? Engine type?
Customer: that doesn't matter. Its a 13 speed eaton transmission
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: yes myself. i need to know which line i should pressurize to get it to shift to low range, then i could feed it direct air and determine if its the range splitter itself or the solenoid that is feeding air to the range splitter
JA: Anything else you want the truck mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 1 month ago.

Hi I'm, Wayne

I will help you with this

here is a air line diagram for 13 speed click here

but most times it is the piston and o-ring that goes bad 98%

drop drive line, drain trans , and pull the back cover of trans

and replace piston and o-ring

I hope this helped you

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Expert:  Wayne replied 1 month ago.

Morning

Just a follow up with you

did my answer help you ??

Let me know,Please

Wayne