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Marty
Dodge Dakota
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3/07/2002
16:19:10
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 Subject: 4.56 gear
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Message:
Anybody running a 4.56 gear? If so what are your RpM's at 70mph. Anybody running a 4.10? If so what are your RpM's at 70?
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Dakaty
GenIII
3/07/2002
19:37:43
| RE: 4.56 gear
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I have 410s
2050 RPM @ 60 mph
2250 @ 70
2650 @ 80
The only DAK I've heard of running the 456s was in the "R/T Shootout" featured in Sport Truck several months ago. It was the fastest of the R/Ts in the article.
I went from 355s to 410s and was HAPPY!
So far only a 1/2 (one half) MPG decrease.
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Marty
Dodge Dakota
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3/07/2002
21:27:28
|  RE: 4.56 gear
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thanks
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MikeD
Dodge Dakota
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3/07/2002
22:05:54
| RE: 4.56 gear
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I have stock 3.92's in my R/T and Dakaty's posts are almost exactly the same RPM's that mine run.
~Mike~
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NewR/T
Dodge Dakota
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3/07/2002
23:08:08
| RE: 4.56 gear
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I thought I remembered reading up on gears awhile back off a drag racing site and they said somethin about the higher the gear the better power off the line but the less your power will be in the top end unless you have somethin to make up for it. The lower the gear the less power off the line but the more top end power you'll have.
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kota on 20s
GenIII
3/08/2002
02:15:18
| RE: 4.56 gear
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Message:
dakaty, what size tires are you running? how much was the ring and pinion?
Eric
Eric, 98 5.2 5speed, K&N gen II, 50mm TB, 2bbl M-1, 1.7RR's, JBA ciramic headers, carsound cat, dumped gibson, and a lot more
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Dakaty
GenIII
3/08/2002
14:02:24
| RE: 4.56 gear
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Message:
I'm still on the stock 255/65/16 Goodyear Eagle LS. I've got only about 25,000 miles on them and there starting to wear out. My 410s are responsible for the loss of a lot of that rubber.
The total install for my Motive Gear 410s was $461.86. The receipt shows: parts $265.00 - Labor $175 - Tax 21.86.
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MikeD
Dodge Dakota
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3/08/2002
14:54:10
| RE: 4.56 gear
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Message:
Dakaty...know where I can get some 4.56's?
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Dakaty
GenIII
3/08/2002
15:54:01
| RE: 4.56 gear
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Message:
Try
http://ring-pinion.com
1.800.292.1031
I've never looked for 456s.
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pinionut
Dodge Dakota
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3/08/2002
20:56:55
| RE: 4.56 gear
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Message:
You got it backwards NewR/T
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NewR/T
Dodge Dakota
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3/08/2002
22:51:57
| RE: 4.56 gear
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Message:
Doh I always get things basakwards
Thanx,
-R/TNew-
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Marty
Dodge Dakota
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3/09/2002
19:26:59
| RE: 4.56 gear
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Message:
Anybody know what size tire I will need to make it through the traps in 3rd w/ a 4.56?
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Dr0p0ff
GenIII
3/10/2002
07:57:01
| RE: 4.56 gear
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Message:
Dakaty, what size rim and tire were you using when you got those numbers?
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Dakaty
GenIII
3/10/2002
20:57:09
| RE: 4.56 gear
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Message:
I have 255/65/16 Goodyear Eagle LS's on the stock 16" Dodge rims. I think the overall diameter is right at 29".
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LowBoy
Dodge Dakota
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3/10/2002
21:08:57
| RE: 4.56 gear
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Marty you'll need the tires off a payloader, good luck!
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Marty
Dodge Dakota
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3/10/2002
22:49:23
| RE: 4.56 gear
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Message:
"I have 255/65/16 Goodyear Eagle LS's on the stock 16" Dodge rims. I think the overall diameter is right at 29". "
What RPM do yuo go through the traps at?
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LowBoy
Dodge Dakota
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3/11/2002
15:27:35
|  RE: 4.56 gear
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Marty,
Let me get this straight, you want to go thru the 1/4 mile traps in 3rd gear in a five speed with 4.56's in the rear end running 29" rubber, right?
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Marty
Dodge Dakota
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3/11/2002
17:48:04
| RE: 4.56 gear
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Message:
no in an auto
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Dakaty
GenIII
3/11/2002
19:53:42
| RE: 4.56 gear
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Marty
I haven't gone to the strip in my Dak...yet. I'm planning on going this Friday night. If the weather holds and the wife doesn't..
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Hersbird
Dodge Dakota
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3/11/2002
20:42:13
| RE: 4.56 gear
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Message:
Marty, is you rev limiter still in the stock place? If you have the MP PCM you can run it to I'd say 5800 with no fear of hitting the rev limiter. This means you top speed in 3rd gear (on the automatic) is 110 MPH with a 29 inch tall tire. I'd say you need a lot of mods before you hit that MPH in the traps. A 28 inch tall tire (like on the R/T) will go to 106 MPH with the same setup. If you are limited to 5100 rpm and have a 28 inch tall tire, you will hit the rev limiter in 3rd at 95 MPH, which you would probably be able to do stock with 4.56 gears. You'll need a 31 inch tall tire to reach 105 MPH on a 5200 rpm redline. Play with this site:
http://www.ring-pinion.com/calc-rpm.html
hope that helps
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