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Ron Walkup
Dodge Dakota
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5/02/2006
13:16:53
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 Subject: ring and pinions gears
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I have a 2001 v6 dodge dakota 4wd extended cab that has a 3:92 rear end. Is it possible to put a higher set of gears in this truck to improve fuel economy? Will the truck still have enough power to take off reasonably well?
any help would be appreciated.
thanks,
ron
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Dex
Dodge Dakota
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5/02/2006
13:35:36
| RE: ring and pinions gears
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Ron,
Your truck gearing is right in the middle of the 3.55 and the 4.10. I just changed from 3.55 to 4.10 to improve my towing. It cost me $1,300 all in.
I do not think you will get anywhere near a MPG improvement to justify the cost. Spend the money on a full tune up, wheel alignment and a lighter foot.
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cuzindoug
GenIII
5/02/2006
19:51:49
| RE: ring and pinions gears
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You can always go to a salvage yard and pick up another set of gears. I had a buddy go and pick up a set for $50...of course his set was geared at 3.55. They were in excellent shape as well. Look around, you would be surprised what you can find.
If it doesn't fit, you're using the wrong hammer!
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Joe M.
Dodge Dakota
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5/02/2006
20:07:39
|  RE: ring and pinions gears
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Ron how about tire size?
they do have an effect on final ratio
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Obio3
Dodge Dakota
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5/02/2006
22:16:41
| RE: ring and pinions gears
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with a v6, I'm thinking you go to 3.55 gears your engine will be working harder under all conditions except down hill. 3.92 gears are the best setup you can have. Either way I don't think you will see little to no differance in fuel milage. You will notice the power lose for sure.
So many problems .... So little time
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rivx
Dodge Dakota
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5/03/2006
12:31:28
| RE: ring and pinions gears
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You can put 3.92 in the rear and still have the stock in the front?
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bludak
Dodge Dakota
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5/03/2006
13:28:06
| RE: ring and pinions gears
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Don't change them Ron, you will notice too much power loss especially with a 4 X 4. I have 3.55's now in my 2wd and am looking to put 3.9's in it. You would have to go to 2.94 or 3.23 to make any milage difference that would be noticeable then you would not be happy with the power. The V6 would have to work too hard with such high gears and the milage may become worse possibly, unless you drove like grandma.
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cuzindoug
GenIII
5/03/2006
21:32:00
| RE: ring and pinions gears
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Hhheeyyyyy, I have stock 2.94 in my truck, I routinely drive 70+ and 60% of the time I "get in it". I still get an average of 21-23 MPG. (19-21 City 24-26 Hwy) I would probably have better grunt with lower gearing, but I am satisfied:)
If it doesn't fit, you're using the wrong hammer!
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91dak
Dodge Dakota
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5/04/2006
12:27:31
| RE: ring and pinions gears
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little help please.have a 91.changed rearend because original busted.never could get the whinning out after that.the r.e. i have came from junk yard.the gears are high.speed o says 75 when im actually doing 65.
my question is,will this hurt my motor and trany?
so far no problems after 5 years.
also how can i correct the speed o reading?
one more,how does the rearend numbering work.i never can remember.
thanks
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bludak
Dodge Dakota
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5/04/2006
13:03:13
| RE: ring and pinions gears
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Sorry, cuzindoug, I am only comparing it to what I have now, and in a good wind, the 3.55's really make it hard to push. I could only imagine what 2.94's would be like. If you had 3.55 to begin with then went to 2.94 you would see what I mean. Your truck must be a real dog off the line.
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cuzindoug
GenIII
5/04/2006
22:46:44
| RE: ring and pinions gears
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Surprisingly enough, no it's not. I definitely have alot of zip, I can roast the tires(not popping clutch)wether I am coming from a standstill or traveling down the road. I would love to drop a set of 4.10's in it, but I don't want to sacrifice my mileage!!
91dak, the whining sound is probably the backlass not set properly. It also sounds like you have a set of ring gears that were made for a different tire size than what you have on it now. It won't hurt your tranny or engine. Really, the only way to correct the speed thing, is to get a set of gears made for your tire size, or get bigger tires:)
The number is like this. The higher the number the greater the torque, the lower the economical speed. The lower the number, the torque decreases, but you can go at higher speed and still get better fuel economy.
If it doesn't fit, you're using the wrong hammer!
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