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180 gearing
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rowcropmafia View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 208 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rowcropmafia Quote  Post ReplyReply Direct Link To This Post Topic: 180 gearing
    Posted: 28 Aug 2014 at 8:03pm
Im looking to add some gearing to my 180 I can't hardly handle 8th 22.5:1 and am blowing the wheels off in 7th 28.25:1. I have a 23-22 tooth gear set in the second gear transmission slot. What I am wondering is if with having those two gears that are close together if I can overdrive the low side of the power director to give me two gears just under 8th.
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O.P.S. Heads View Drop Down
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Joined: 02 Jan 2013
Location: Iowa
Points: 574 		Post Options Post Options   Thanks (0) Thanks(0)   Quote O.P.S. Heads Quote  Post ReplyReply Direct Link To This Post Posted: 28 Aug 2014 at 8:51pm
I wish I had a photo with the over / under gears and their tooth counts in the torque housing. There should be a way to change the gear pair (not the hollow shaft pair - the other pair) to get a ratio so low side is 10% or so faster. You should be able to have custom gears made as they are a simple, helical cut gear with a splined I.D. You could have that pair made close to whatever ratio suits you. High side would remain the same. Low side would be faster. The 20% gap in speed between the two would be less.

Edited by O.P.S. Heads - 28 Aug 2014 at 8:52pm
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bsallis180 View Drop Down
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Joined: 29 Jul 2013
Location: Pennsylvania
Points: 207 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bsallis180 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Aug 2014 at 9:19pm
What about a gear box mounted in front of tranny that way you cam change gearing to
Go Faster Easier and cheaper if you want to build more power down the road ?
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O.P.S. Heads View Drop Down
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Joined: 02 Jan 2013
Location: Iowa
Points: 574 		Post Options Post Options   Thanks (0) Thanks(0)   Quote O.P.S. Heads Quote  Post ReplyReply Direct Link To This Post Posted: 28 Aug 2014 at 9:32pm
That is true. Mack on this forum has them for sale and maybe even on the shelf at any ratio you want. Keep in mind that speeds EVERYTHING up or slows everything down depending on what you chose to do.

In my mind, for your class the 180 - 185 driveline with 18 X 38 rubber is perfect. If the low side of the PD could be sped up 10% you would have two useable gears and that's all you would ever need. If you needed to go faster, then make the low side gears faster than the high side gears if that is possible. I wouldn't know without disassembling a torque housing and doing some measuring. The problem that will arise will be if you have enough poop under the hood to run faster than road gear (and spin it out with authority) you will most likely break the over / under gear system.
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rowcropmafia View Drop Down
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Joined: 11 Sep 2009
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Points: 208 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rowcropmafia Quote  Post ReplyReply Direct Link To This Post Posted: 28 Aug 2014 at 10:07pm
I have talked a little to eugene McNealy about a gearbox. Is that the same guy? Im pretty sure the dominant tractor in the class is running right at 23.5:1 gear and spinning it out pretty easily. I'll admit he has me out horsed by a good amount. But I think with some time and work I'll be able to get it up there and run that 8th gear a little better. I really think the way it sits im leaving quite a bit on the table as far as having the motor really running right. I feel like a 25.5:1 gear is a little on the slow side. Im thinking 24:1 would work better. I know im splitting hairs but really feel like that is the magic number for me right now.
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O.P.S. Heads View Drop Down
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Joined: 02 Jan 2013
Location: Iowa
Points: 574 		Post Options Post Options   Thanks (0) Thanks(0)   Quote O.P.S. Heads Quote  Post ReplyReply Direct Link To This Post Posted: 28 Aug 2014 at 10:09pm
Yep, that's the man.

Edited by O.P.S. Heads - 28 Aug 2014 at 10:11pm
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rowcropmafia View Drop Down
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Joined: 11 Sep 2009
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Points: 208 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rowcropmafia Quote  Post ReplyReply Direct Link To This Post Posted: 28 Aug 2014 at 10:17pm
Ok thanks. Im going to try to get on a dyno at some point this winter im thinking ill probably wait until I have a better idea lf what kind of improvement I can make on getting it to lug properly before I do anything with the trans. It just seems to always fall on its face right now and cant seem to get any consistency on pressures and temps. Its good to have the people on this site
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O.P.S. Heads View Drop Down
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Joined: 02 Jan 2013
Location: Iowa
Points: 574 		Post Options Post Options   Thanks (0) Thanks(0)   Quote O.P.S. Heads Quote  Post ReplyReply Direct Link To This Post Posted: 28 Aug 2014 at 11:07pm
This is a good forum.

I'm sure there a lot more Dodge / Cummins pickup truck forums for that damn engine you have in that thing.

Just kidding. You knew I was going to take a shot sooner or later.

Edited by O.P.S. Heads - 28 Aug 2014 at 11:10pm
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rowcropmafia View Drop Down
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Joined: 11 Sep 2009
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Points: 208 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rowcropmafia Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2014 at 7:49am
There are alot of cummins forums. But they are all full of kids wanting to know how to make their trucks smoke and what kind of chrome stacks make the most horsepower. Most of those guys dont have a clue how to make power at 3000 rpm. The only answer you would get is put a bigger turbo on and add an intercooler
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injpumpEd View Drop Down
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Joined: 13 Sep 2009
Location: Walnut IL
Points: 4768 		Post Options Post Options   Thanks (0) Thanks(0)   Quote injpumpEd Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2014 at 8:05am
I'm surprised you guys haven't figured out yet, that Cummins needs a set of tow mirrors flipped up to make any measurable amount of power! 
210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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bsallis180 View Drop Down
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Joined: 29 Jul 2013
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Points: 207 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bsallis180 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2014 at 8:14am
Not sure how built that 5.9 is of yours but if go with a bigger gear set is won't be hard to make up the power and cheap to make it spin out even at 3000rpm
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Butch(OH) View Drop Down
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Joined: 11 Sep 2009
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Points: 3829 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Butch(OH) Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2014 at 8:28am
Originally posted by injpumpEd injpumpEd wrote:

I'm surprised you guys haven't figured out yet, that Cummins needs a set of tow mirrors flipped up to make any measurable amount of power! 

I wondered why all the Dodge dorkmires ran around with  the mirrors flipped out Wink 
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Joined: 25 Sep 2009
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Points: 369 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bob C IL Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2014 at 9:08am
Yep got the same prob. I talked to atlas tractor and emailed cross sections of pd and trans to get a set of gears to speed me up. I'm at 27.8 to 1 and high 4th is 22.3 to 1.
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