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R/Truck
Dodge Dakota
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11/08/2002
17:07:26
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 Subject: RE: 4.56 Gears
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Going from 3.55 - 4.10 is a major jump, and will be very noticable gain in performance. You can go on up to 4.56 too, but you wouldn't recognize your truck and probably go crazy with tire spin. lol
What is tire fire?
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Grant
Dodge Dakota
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11/08/2002
17:10:19
| RE: 4.56 Gears
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Sorry, tire fire is tire spin. I only get one tire spinning because i dont have limited slip. Would i need that changed too with the 4.10
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Fubar512
GenIII
11/08/2002
17:10:59
|  RE: 4.56 Gears
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Grant,I would tend to beleive that going from 3.55s to 4.10s would make for a noticable improvement in acceleration and low end-grunt, with maybe a .5 mpg penalty in highway milage, if that.
The 4.56s, on the other hand, will take away at least 1 mpg at highway crusing speeds.
That being said, few mods help flatten out your eyeballs better then a set stiff gears, like 4.56s!
Confucious say: Any man can pee on wall. Be a true hero and crap on ceiling! I've tried being a hero once too often...
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R/Truck
Dodge Dakota
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11/08/2002
17:14:26
| RE: 4.56 Gears
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Probably but your looking at a few more hundred dollers. Traction will be a bigger concern but with a good set of tires you will still be able to control it. From what I have heard you can spin the tires going 0-40mph with the 4.56 gears, without limited slip it may be even more fun trying to find traction.
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Grant
Dodge Dakota
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11/08/2002
17:18:04
| RE: 4.56 Gears
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Thanks. Im starting to get it. I just got brand new tires and it makes a huge difference up here in b.c. in the rain, ive noticed it already with the rain, but i have wanted to get the limited slip for a while, and changing to 4.10 sounds pretty good. Would it be better to just go for a 3.92 or go all the way with a 4.10?
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R/Truck
Dodge Dakota
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11/08/2002
17:21:13
| RE: 4.56 Gears
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Given the choice I would go with the 4.10, it's just a tad more gear then the 3.92s but you will like them. I have heard the lower gears makes for one of the biggest changes in the way your truck performs.
Or you can purchase someones stock gears and maybe save a few pennys.
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MikeD
*R/T*
11/08/2002
17:23:41
| RE: 4.56 Gears
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Any info on the prices of the kit yet?
~Mike~
Get In...Sit Down...Shutup...& Hangon
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Grant
Dodge Dakota
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11/08/2002
17:25:14
| RE: 4.56 Gears
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Do you know what a resonable price for 4.10 gears would be? and where a place to get them at?
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R/Truck
Dodge Dakota
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11/08/2002
17:26:26
| RE: 4.56 Gears
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Not yet
I'm guessing around $300 for the entire thing but we will see. He usuelly gets back to me the next day. I also have another vendor that's going to get me a price monday. So I will keep you posted.
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xplikt
GenIII
11/08/2002
18:51:41
| RE: 4.56 Gears
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R/Truck, you gotta be sure to make it clear that this is for 2WDs. Heh, It's a /tad/ different for the 4WDs..
Randy's Ring and Pinion is about 300 for ring, pinion, seal, shim, instructions, and bearing kit (not to mention free support). Hopefully we can get a good price. Or maybe Randy's will be willing to give us a decent deal??
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae
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R/Truck
Dodge Dakota
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11/08/2002
20:34:36
| RE: 4.56 Gears
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I spoke with a vendor about the gears and he wants me to keep the $ of the public forum, so email me for details. I will have all the info by Monday. jimmortgage@hotmail.com
This is what he told me:
The 4.7 and 6 cyl use an 8 1/4 I believe. Those rears only have a richmond gear listing available but i can look further into it. they should stick to 3.91 gears or might run out of motor . they would need the rpm capabilities to make the end of the track but they have pcm problems(nothing available). cost on richmond gears is higher.
In the 5.9 area only a couple places are available, most use motive gears (ford motorsport) No richmond is made but i heard of another brand called "yukon" , it might
be a private label but made from motive.
Once again email me if your interested and what engine you have and I will get back to you with prices on Monday via your email address.
Thanks
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xplikt
GenIII
11/08/2002
21:48:43
| RE: 4.56 Gears
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R/Truck, a lot of the 4.7s use the 9.25 -- at least mine does. We can't count on deciding rear ends by engine or cab, we need the person to actually know their rear end. Simplicity.
Summit sells Richmonds actually. For pretty cheap. Check out their prices. Only problem there is they are sold out of 4.56s for the 9.25 'till I think late this month.
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae
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POWER HUNGRY
Dodge Dakota
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11/08/2002
23:09:01
|  RE: 4.56 Gears
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Here are some sites I know of that has gears
From www.mopartsracing.com
8 1/4" rear axel ( 10 bolt cover)
5249928 3.55:1 ratio 259.50
4529271 3.90:1 ratio 255.00
4529900 4.10:1 ratio 328.50
4529902 4.56:1 ratio 259.50
9 1/4" rear axel (12 bolt cover)
5249927 3.55:1 ratio 219.50
4529272 3.90:1 ratio 245.00
From summit
RMG-6903141 Chrysler: 8.25 in. ring gear or 8.375 in. ring gear, 4.10 ratio, ring and pinion set ... $238.95
RMG-6903161 Chrysler: 8.25 in. ring gear or 8.375 in. ring gear, 4.56 ratio, ring and pinion set ... $238.95
RMG-4900761 Chrysler: 8.25 in. ring gear and 8.375 in. ring gear, 3.91 ratio, ring and pinion set ... $276.95
RMG-6902201 Chrysler: 9.25 in. ring gear, 4.10 ratio, ring and pinion set ... $247.95
From www.drivetrain.com
# after "-" is the gear ratio (i.e. -271=2.71:1)
Ring & Pinion Price List
Motive Gear Part # R&P Jobber $$ master kit$$
C8.25-271 $255.75 $366.00
C8.25-294 $255.75 $366.00
C8.25-321 $255.75 $366.00
C8.25-355 $255.75 $366.00
C8.25-390 $255.75 $366.00
C8.25-410 $255.75 $366.00
C8.25-456 $258.95 $366.00
R8.25RMK $92.30
Installation Kits include: Pinion nut, Pinion seal, crush sleeve, pinion shims, carrier shims, ring gear bolts, locking compond, brush & gasket. Overhaul kit includes: all of the above plus pinion bearings, races, carrier bearings and races all TIMKEN quality.
For 9.25 from same site:
Ring & Pinion Price List
Motive Gear Part # R&P Jobber $$ Master Kit $$
C9.25-271 $265.75 $375.45
C9.25-294 $263.75 $373.45
C9.25-321 $263.75 $373.45
C9.25-355 $263.75 $373.45
C9.25-390 $263.75 $373.45
C9.25-410 $263.75 $373.45
C9.25-456 $263.75
R9.25RMK MASTER BEARING KIT $121.25
This site also lists the torque settings on all diff. fasteners..
www.reiderracing.com sells precision gear sets (www.precisiongear.com)
for 8 1/4 rear(3.07,3.21,3.55,3.91,4.10,4.56)
for 9 1/4 rear(3.21,3.55,3.91,4.10,4.56)
The 3 above site each have calculators to see what your rpm will be like with you size tires.
Another option for for the guys without a LSD is to go to a junkyard and find a factory 3.92 sure-grip rearend. It should cost a lot less, gears $300+,lsd unit $260-$400, then installtion $$$???
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texaslawdawg
Dodge Dakota
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11/08/2002
23:14:08
| RE: 4.56 Gears
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So would I see much of an improvement in my R/T with 3.92's if I only go up to a 4.10 ? I dont take it to the track, its my "fun" vehicle. Only put about 400 miles a month on it. I just want a little more low end jump.
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POWER HUNGRY
Dodge Dakota
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11/09/2002
00:25:17
| RE: 4.56 Gears
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I think the ratios are too close to be worth the money without that much of a difference. I would look at 4.56 or a higher stall TQ converter for a better launch plus a shift kit. The other option is to do motor work?
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Grant
Dodge Dakota
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11/09/2002
04:59:44
| RE: 4.56 Gears
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R/Truck, you said if i only have the 8 1/4, i should stick with a 3.92, or else i would run out of motor. How would i run out of motor with the 4.10?? is it that much of a difference. I need to look and see which rear end i have. is it, if i have 10 bolts i have the 8 1/4 and if i have 12 bolts i have the 9 1/4??
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Dak Man
Dodge Dakota
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11/09/2002
11:40:14
| RE: 4.56 Gears
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I don't know if you plan on driving on the street with 4.56 gears but if you do you will probably not like them. I had a 4.56 unit in a 69 dart and it was too much for the street. It will literly wear out your motor if you drive it on the highway very much unless you have a really tall tire.
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xplikt
GenIII
11/09/2002
12:18:11
| RE: 4.56 Gears
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Message:
Look at it this way, 3.92s --> 4.10 yields a 4.6% change. That seems way too small to me. I considered them too, but the difference changed my mind.
I'm kind of leaning towards Randy's myself..
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae
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buddy jones
Dodge Dakota
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11/10/2002
16:12:43
| RE: 4.56 Gears
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The 4.56 gears will be great for daily driving use in your Dakota.
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MIkeD
*R/T*
11/10/2002
18:26:29
| RE: 4.56 Gears
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Biggest thing I'm afraid of is that I'm around alot of highways here in Dallas and the lower gear will make it run at a higher rpm all the time and mine only being a 4 speed instead of 5 will mean big hurt on my engine in the long haul.
~Mike~
Get In...Sit Down...Shutup...& Hangon
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buddy jones
Dodge Dakota
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11/10/2002
18:50:31
| RE: 4.56 Gears
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Someone a while back said that it only made a 300rpm difference.
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xplikt
GenIII
11/10/2002
19:33:38
| RE: 4.56 Gears
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That's what OD is for!
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae
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MikeD
*R/T*
11/10/2002
21:33:40
| RE: 4.56 Gears
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LOL yeah Xplikt your OD is 5th gear mine is only 4th gear. At 70 I'm runnin pretty close to 2800-3000rpm's your runnin probably around the 2000 range :P
~Mike~
Get In...Sit Down...Shutup...& Hangon
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xplikt
GenIII
11/10/2002
22:18:45
| RE: 4.56 Gears
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Message:
You run those RPMs with OD on??
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae
|
POWER HUNGRY
Dodge Dakota
JOIN HERE
11/10/2002
22:59:09
| RE: 4.56 Gears
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The auto has a bigger OD gearing of .69 vs. .729 for the 5spd. The rpm's in the R/T with 4.56 gears will only be about 225 rpm's higher than the 5th gear of the stick with 3.92 gears at 60mph.
4spd auto gearing 2.450, 1.450, 1.000, 0.690 NV3500(5spd) 4.01, 2.32, 1.40, 1.00, 0.729
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MikeD
*R/T*
11/10/2002
23:01:37
| RE: 4.56 Gears
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No I meant that would be w/ the new gears on...stock at 70 I run about 2500 @ 70mph w/ the OD on
~Mike~
Get In...Sit Down...Shutup...& Hangon
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POWER HUNGRY
Dodge Dakota
JOIN HERE
11/10/2002
23:25:26
| RE: 4.56 Gears
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Message:
I was just letting you know that the 5spd guys would turn more rpm's even in 5th gear. If your running 2500rpms@ 70mph with 3.92s, your rpms would be about 2910 with the 4.56s. If your worried about your rpms you could always get a slightly taller tire and cut the 4.56 gear to around 4.30s.
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R/Truck
Dodge Dakota
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11/11/2002
10:49:36
| RE: 4.56 Gears
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I found out the prices on the gears including install kit and they are lower then the ones listed above.
email John Mercedes for details:
jmmtsb@prodigy.net
He can get richmond gears, motive gears, and Raytech install kits.
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SinCity R/T
Dodge Dakota
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11/11/2002
13:59:44
| RE: 4.56 Gears
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If 4.10's aren't enough of a difference from 3.92 to merit spending the money, and many people feel that 4.56's are too much, why aren't people beating down some doors to have some 4.30's made for the 9.25" rear end? (I would but I don't know whose door to beat on, not my set of contacts)
Bueller? Bueller? Frye?
- Steve
http://www.dakota-durango.com
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xplikt
GenIII
11/11/2002
14:06:27
| RE: 4.56 Gears
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Message:
Get a taller tire.
-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae
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