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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 2054
Experience:  Owner at DJ Wilson
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My 1980 mack gearbox was stuck in reverse, and in high range

Customer Question

Hi my 1980 mack gearbox was stuck in reverse, and in high range two seperate problems.
I have removed the top of the gearbox - pneumatic selectors and am chasing how to set timing as the threaded adjuster was loose and Insulect this is the problem ?
JA: What's the make/model/year of your truck? Engine type?
Customer: It's a 1980r as far as I can tell with a 6cylinder turbo
JA: Anything else you want the truck mechanic to know before I connect you?
Customer: No that's all thanks
Submitted: 11 months ago.
Category: Medium and Heavy Trucks
Expert:  Jeremy replied 11 months ago.

My name is ***** ***** I will assist you with your question today.

I'm an independent contractor and I don't get paid until a rating has been made.

We can go back and forth as needed to help resolve the issue you are having. Follow ups are free after ratings, so rate in confidence!

i've been away for a few days and saw this is still sitting. Did you still need assistance with this? If so, how many speeds is this one so I can get you the needed info.


You want a 5 star service and I want to provide a 5 star service. Please consider that I don't know your skill level as well as I can't see, touch, smell, hear the vehicle/machine in question. Please provide as much detail as possible and I will provide as much back.

Once an answer is provided, you should see a rating screen. Please rate my personal service to you. The ratings are my personal feedback, they are not the site feedback.

Thank you for allowing me to assist you through Just Answer!


Customer: replied 11 months ago.
Hi Jeremy,
I have resolved the problem, I rebuilt the air shifter on top of the splitter box and set it up to the positions i measured and it works great.
Expert:  Jeremy replied 11 months ago.

I had a feeling that is where you would find the issue.

Glad it was resolved!

I will send this to customer service for you.


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