Jump to content

Change Transmission?


Recommended Posts

I have an 88 Suplerliner with 350 mack engine and mack 9 speed trans. I had the fuel turned up by a local diesel shop and that helped give me some more power. The truck runs great until I get in the last few gears or on the interstate and it just seems like every little hill just kills it. If I changed to a 12 or 13 speed trans would the make much of a difference? Thanks for the help, this is my first truck and really want to keep it.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...