Baker DD7 Pros & Cons
Grand HDF Member
Joined: Dec 2007
Posts: 4,999
Likes: 55
From: Bay Area
I remember in the days of being around big rigs, its kind of the same as bikes, who can make more power. I do remember trucks that had more gears had less hp! If anyone is running decent torque especially 100+ you dont need more gears.
Road Warrior
Joined: Oct 2010
Posts: 1,597
Likes: 1
From: Frederick, CO
I don't NEED more gears but it would be good to know I had a solid tranny with the baker name behind it. Not that I expect the factory one to fail. but if it does I will have the baker gear set. but I wont pay $2700. I will get a discount from somewhere.
My understanding is that the Direct Drive (1:1) transmissions have about 99% power transfer to the rear where an Overdrive transmission only has about a 92% transfer of power to the rear. I really don't fully understand what that all equates to but it is the reason stock bikes have the Direct Drive and not an OD.
No worries. It took me quite a bit of digging to understand what was going on with transmissions for HD's. Jims, Baker and HD (Screaming Eagle) have 6 speed Overdrive transmissions. Baker is the only one I know of with a 7 speed.
My understanding is that the Direct Drive (1:1) transmissions have about 99% power transfer to the rear where an Overdrive transmission only has about a 92% transfer of power to the rear. I really don't fully understand what that all equates to but it is the reason stock bikes have the Direct Drive and not an OD.
My understanding is that the Direct Drive (1:1) transmissions have about 99% power transfer to the rear where an Overdrive transmission only has about a 92% transfer of power to the rear. I really don't fully understand what that all equates to but it is the reason stock bikes have the Direct Drive and not an OD.
Road Warrior
Joined: May 2009
Posts: 1,537
Likes: 4
From: The Great River Road, Wisconsin
Well said SR...............
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Joined: Sep 2009
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From: SE Michigan
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
While the trans mentioned all have a direct top, they are also over-geared. That is to say the overall gearing is very high, giving the same effect as an over-drive. Even the stock 5-speed trans on Evos and TC88s is over-geared.
