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MikeD
*R/T*
11/08/2002
10:08:40
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 Subject: 4.56 Gears
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Message:
Would I benefit from a taller gear like a 4.56 w/ all the mods I currently have? I know it'll help me off the line w/ the bog till the cam wakes up but I'm worried if it'll change my top end even though I have the mods to take care of the top end.
~Mike~
Get In...Sit Down...Shutup...& Hangon
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xplikt
GenIII
11/08/2002
10:09:50
| RE: 4.56 Gears
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Message:
We should get a 4.56 9.25 corp group buy going here.
-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
JOIN HERE
11/08/2002
11:20:23
| RE: 4.56 Gears
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Message:
I have heard from a couple of guys that have the gears that it actually improves top end. 120+ is no problem with them. Your rpms will be 200-300 higher on the highway, and your mpg will improve in the city. Other then serious traction issues they make the truck perform better, like night and day.
I'm interested in a group buy. I know you can get them from John Mercedes for around $150-200 I think.
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Demon-Xanth
Dodge Dakota
JOIN HERE
11/08/2002
11:55:03
| RE: 4.56 Gears
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Message:
To get a better idea of the RPM@ certain speeds,
assuming a 5 speed w/ 29" tall tires (stock 16"), rounded to the nearest 100RPM
3.55 (base assumption):
70 2200RPM
115 3500RPM
3.92:
70 2400RPM
115 3900RPM
4.11:
70 2500RPM
115 4100RPM
4.56:
70 2800RPM
115 4500RPM
4.56 may be pushing it unless you have larger diameter tires, 4.11 seems about right
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MoparDude340
Dodge Dakota
JOIN HERE
11/08/2002
11:56:32
|  RE: 4.56 Gears
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Message:
Does anybody make 4.56's for 8.25's? These 3.55's are killing me.
Later,
'98 3.9 RC... A few mods... ;-)
'88 340 RC... I'll never tell... Okay, I might... ;-)
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R/Truck
Dodge Dakota
JOIN HERE
11/08/2002
12:18:55
| RE: 4.56 Gears
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Message:
I'm going to try and put together a group buy, let me know if your interested in some 4.56 gears.
We have 2 others on the delpi board that want some so far.
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MikeD
*R/T*
11/08/2002
12:26:26
| RE: 4.56 Gears
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Message:
I'm in...what brand are they...are they top of the line? No cheap stuff going on my truck ;)
~Mike~
Get In...Sit Down...Shutup...& Hangon
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power hungry
Dodge Dakota
JOIN HERE
11/08/2002
12:51:50
|  RE: 4.56 Gears
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Message:
The deeper gears help acceleration throughout the rpm range. They will lower the top speed because it'll reach the rev limiter at a lower speed. You will get to that speed quicker. Depending on your trans,tire size and peak hp/redline will determine the best gear ratio in a drag racing stand point.
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xplikt
GenIII
11/08/2002
13:00:44
| RE: 4.56 Gears
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Message:
I'm in, but I would also like to know what brand of gears they'll be. It was CWs reccs that we install new bearings while doing this too, so can we get those as well?
-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
11/08/2002
13:01:00
| RE: 4.56 Gears
IP: Logged
Message:
Using the gear calculator at www.4lo.com with 29" tires in 3rd gear(auto)/4th(manual) going through the lights at 6000rpms will let you run 113.6mph. With 27" tires(255/50/15) will run 105.7mph through the 1/4 mile.
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MikeD
*R/T*
11/08/2002
13:50:41
| RE: 4.56 Gears
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Message:
My all time best so far has been 98.7mph
~Mike~
Get In...Sit Down...Shutup...& Hangon
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Grant
Dodge Dakota
JOIN HERE
11/08/2002
14:01:23
| RE: 4.56 Gears
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Message:
Hey there, i dont know if anyone can help me on this one. But i only have a 3.9l engine w/ 5 speed transmission. Would changing 3.55 to a 3.92 or 4.11 be good on my truck? what exactly does it doing changing the gears like that, and what kind of work is it to do it. What would i benifit from it and what would i regret (if any)?? thanks you guys
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R/Truck
Dodge Dakota
JOIN HERE
11/08/2002
14:12:49
| RE: 4.56 Gears
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Message:
A lower gear will improve your acceleration, city mpg, and make it a bit more fun around town. The downside is a little higher rpms and lower highway mpg.
Yes you would notice a night and day change in the way your truck drives.
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R/Truck
Dodge Dakota
JOIN HERE
11/08/2002
14:18:01
| RE: 4.56 Gears
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Message:
I just emailed John Mercedes about the gears, I will post the details and price once I get it.
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Chris
Dodge Dakota
JOIN HERE
11/08/2002
14:23:14
| RE: 4.56 Gears
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Message:
Those revs seem low to me. With my 2000 and 3.92's I rev at 3000 RPM at 85MPH in 5th with the 275/60/15's.
I would consider 4.10's though...
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Lab Rat
GenIII
11/08/2002
14:25:24
| RE: 4.56 Gears
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Message:
R/Truck, how about a choice in the package? I'm seriously considering the 4.10s.
LR
Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!
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Chris
Dodge Dakota
JOIN HERE
11/08/2002
14:28:01
| RE: 4.56 Gears
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Message:
Any idea how much, will it include both the 8.25 and the 9.25, any bearings, install kit, etc?
Chris
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xplikt
GenIII
11/08/2002
14:30:27
| RE: 4.56 Gears
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Message:
Since you all are planning on changing your gears out. Be sure to put in some nice synthetic gear lube (do this after you use regular lube for the first 500 miles) like Redline. www.myoilshop.com has the best prices, shipping, and best service than any other Redline dealer I know of.
-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*
11/08/2002
14:37:34
| RE: 4.56 Gears
IP: Logged
Message:
R/Truck your near Houston right? isn't there a place in Houston that specializes in gears? I heard they know their sh!t if you know the name I'd drive from Dallas to have them install mine.
~Mike~
Get In...Sit Down...Shutup...& Hangon
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R/Truck
Dodge Dakota
JOIN HERE
11/08/2002
14:43:22
| RE: 4.56 Gears
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Message:
I'm sure the 4.10 gears are very similiar in price to the 4.56 gears (but I wouldn't go with the 4.10 gears unless you have 3.55 now). I just asked him to give us a price on v-8 and v-6 gears along with everything else we need. I think you need to change out some bearings and that comes in a kit in addition to the gears.
I'm in Houston, not sure of the place your talking about. But there is another guy here that has the 4.56 gears, I will ask him.
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Lab Rat
GenIII
11/08/2002
14:48:13
| RE: 4.56 Gears
IP: Logged
Message:
MikeD, have you ever dealt with ET Automotive in Garland? They've been doing diff setups for decades and I may use them if I don't have the time.
LR
Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!
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xplikt
GenIII
11/08/2002
15:03:06
| RE: 4.56 Gears
IP: Logged
Message:
Make it a challenge! Do it yourself. Any chance on a dial indicator group buy with that? ;)
-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
|
MikeD
*R/T*
11/08/2002
15:10:23
| RE: 4.56 Gears
IP: Logged
Message:
Hey Lab Rat,
Yeah I've bought a few parts off them. I've heard Earnie knows what he's talkin about but I didn't know if they'd done gears on an R/T before so thats why ET never crossed my mind. I'm sure there's alot of shops here in Dallas that could do quality work but I'd never know who to start w/. But since you mentioned ET I'll give em a call!
BTW...where you live at?
~Mike~
Get In...Sit Down...Shutup...& Hangon
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xplikt
GenIII
11/08/2002
15:26:24
| RE: 4.56 Gears
IP: Logged
Message:
R/Truck, do you know what'll be included in the kit:
Bearings
Instructions (important for those of us doing it ourselves)
Crush sleeve
Seals
Shims??
-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
JOIN HERE
11/08/2002
15:43:06
| RE: 4.56 Gears
IP: Logged
Message:
www.motivegear.com is the one he uses I think.
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Lab Rat
GenIII
11/08/2002
15:44:24
| RE: 4.56 Gears
IP: Logged
Message:
xplikt, probably will but need a backup plan just in case; can't do without my truck for long...
MikeD, I'll bet they've done plenty since the same basic 9.25" diff has been around since the 70's. Let us know what they say.
Oh, and, I'm out in Wylie (east of Plano, north of Garland). Had all we could take of Plano a few years ago...
LR
Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!
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xplikt
GenIII
11/08/2002
15:56:54
| RE: 4.56 Gears
IP: Logged
Message:
I've heard pretty good things about Motive. Isn't that what GM uses for OEM?
I can do without my truck for a bit. I can drive my family's 95 Ford Escort Wagon around. Man that thing is a beast, it's the EFI model too.
-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
|
xplikt
GenIII
11/08/2002
15:58:15
| RE: 4.56 Gears
IP: Logged
Message:
In addition, 4.56 / 3.92 means a around a 16% change, right?
-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
|
Lab Rat
GenIII
11/08/2002
16:55:40
| RE: 4.56 Gears
IP: Logged
Message:
Yup, and it's about the same for going from 3.55s to 4.10s.
Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!
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R/Truck
Dodge Dakota
JOIN HERE
11/08/2002
17:00:00
| RE: 4.56 Gears
IP: Logged
Message:
Got a little more info:
You need, ring gear, pinion gear, install kit which should included front and rear pinion bearings, carrier bearing, shims, crush sleve, paint with brush to find pinion depth.
So the kit will have everything we need besides fluid of course.
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Grant
Dodge Dakota
JOIN HERE
11/08/2002
17:04:01
| RE: 4.56 Gears
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Message:
How come you would only go to the 4.10 if you have a 3.55 right now? why not the 4.56, is that too much of a difference. I only have one tire fire right now, is that ok with a 4.10? or does it change that? sorry for the dumb questions.
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