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Wayne Crawford
Wayne Crawford, Shop Owner
Category: Transmissions
Satisfied Customers: 3904
Experience:  General Repair Shop Owner
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I have a 02 acura mdx awd 3.5 automatic. problem is that its

Customer Question

Hi there i have a 02 acura mdx awd 3.5 automatic. problem is that its only shifting on 1 and 2d gear not 3,4 or 5. It starts going shifts ok to second gear then gets to like 35 or 40 mph and does not shift to third gear. Also notice the D5 light on dash cluster starts flashing. There is a code. Po780. Need help to fix this thanks.
Submitted: 1 month ago.
Category: Transmissions
Expert:  Wayne Crawford replied 1 month ago.

Hello. My name is ***** ***** I will be helping you today.

Did this just start out of the blue?

And what do you mean by it doesnt shift to third? Please elaborate.

Customer: replied 1 month ago.
I mean that if i put it on D5 i will start driving then i can hear it shift to second gear and thats it. It wont shift to third gear.
Expert:  Wayne Crawford replied 1 month ago.

So it continues to drive just fine in second and just never even attempts an upshift?

Customer: replied 1 month ago.
Thats right. So i can go fast cause rpms go up and i forse the engine
Expert:  Wayne Crawford replied 1 month ago.

And have you got the transmission codes checked? Its gonna be an electrical issue and the flashing light is saying there is a transmission trouble code stored. Thats where you need to start.

And do NOT drive it unless its a life or death emergency. The more you drive it like this the more likely it is that you will cause a mechanical problem.

Customer: replied 1 month ago.
The code that it has is po780
Expert:  Wayne Crawford replied 1 month ago.

OK that code is almost always caused by a mechanical failure.

Have you checked the fluid level, color and smell?:

Customer: replied 1 month ago.
Its duty i am going to replace it. Is it posible that be the cause? Can i tell me which solenoid is for 3rd shift
Expert:  Wayne Crawford replied 1 month ago.

Does it smell burned?

Expert:  Wayne Crawford replied 1 month ago.

Its shift solenoid B. I am attaching a picture.

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