Unerdrive trans
Thread Starter
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Fleet Mechanic
Joined: Aug 2002
Posts: 1,344
Likes: 12
From: Sioux Falls SD
Unerdrive trans
Who makes a under drive trans for the Mazda 5speed. I contacted Gearvendors and they do not. They also said there unit does not go below 1st gear. I would like to slow down my 1st and reverse gears some.
Thread Starter
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Fleet Mechanic
Joined: Aug 2002
Posts: 1,344
Likes: 12
From: Sioux Falls SD
To get 1st gear low enough I would need about 5.14 rear gear. My truck would be useless for regular driving. I want to be able to slow down 1st and rev. When moving trailers around. Once moving my gear ratios are fine.
Senior User
Joined: Sep 2003
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Type “auxiliary transmissions” in your web search engine and you should find lots of potential vendors. MSN turned up over 11,000 hits. I did not see anything for the M5OD transmission, but surely somebody makes one or would modify the mounting system to work for you. If nothing else, call Advance Adaptors @ 805-238-7000 and see if they offer an adaptor kit for the M5OD or can give you any ideas where to begin looking.
Another option might be to look for a two-speed differential. I have not seen one of these in years, but they used to be available for one-ton trucks so you might be able to find something that would fit in the F150.
Another option might be to look for a two-speed differential. I have not seen one of these in years, but they used to be available for one-ton trucks so you might be able to find something that would fit in the F150.
Thread Starter
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Fleet Mechanic
Joined: Aug 2002
Posts: 1,344
Likes: 12
From: Sioux Falls SD
Originally Posted by sigma
Type “auxiliary transmissions” in your web search engine and you should find lots of potential vendors. MSN turned up over 11,000 hits. I did not see anything for the M5OD transmission, but surely somebody makes one or would modify the mounting system to work for you. If nothing else, call Advance Adaptors @ 805-238-7000 and see if they offer an adaptor kit for the M5OD or can give you any ideas where to begin looking.
Another option might be to look for a two-speed differential. I have not seen one of these in years, but they used to be available for one-ton trucks so you might be able to find something that would fit in the F150.
Another option might be to look for a two-speed differential. I have not seen one of these in years, but they used to be available for one-ton trucks so you might be able to find something that would fit in the F150.
Senior User
Joined: Sep 2003
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It could be a myth but I’ve always heard you can’t use a transfer case strictly for gear reduction. Supposedly the torque reduction is all out of wack if you don’t use both drivelines and the internal strain will take out the bearing in short order. Who knows?
If it would work that would be a pretty easy solution…
If it would work that would be a pretty easy solution…
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From: La Tech University, La
that may be true, I just thought of it off the top of my head. so who knows. I learn something new every dy 
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