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Clevite 77
Dodge Dakota
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6/27/2002
09:34:54
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 Subject: 5.7L
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The 5.7L, from what I've read bolts up to a 545RFE, which correct me if I'm wrong, is the same as our 45RFE's just programmed differently.
Ya think it's possible we could buy a complete crate motor and drop it into a 2002 CC 4x4 hehe and what do ya think it'll cost? it's more power than what a s/c will do, without strengthening the bottom end.
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FazDak
GenII
6/27/2002
12:28:20
| RE: 5.7L
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Just got finished readin Mopar Now's article on the new hemi and they stated that the bellhousing bolt pattern is completely different than the Mags trans.
Sorry, Scott
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Clevite 77
Dodge Dakota
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6/27/2002
13:25:49
| RE: 5.7L
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mags trans???
Are you referring to the magnums Trans
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Demon Dakota
DakotaEnthusiast
6/27/2002
15:24:28
| RE: 5.7L
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Check out this link below. That should answer most of your questions.
http://allpar.com/mopar/new-mopar-hemi.html
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Demon Dakota
DakotaEnthusiast
6/27/2002
15:27:22
| RE: 5.7L
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The 545RFE transmission is not just a reprogrammed 45RFE because it (545RFE) has 5 speeds instead of just 4 like the 45RFE. The 2002 Durango has the 545RFE in it right now, and it will become standard issue in some of the Dakotas next year.
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Rob
GenIII
6/27/2002
15:30:40
| RE: 5.7L
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I am not saying it the same but I think it is the 45rfe can have gears addes through programing
robertshaw 180 thermostat,Z-Tube,Magnaflow stainless exhaust,jet stage 2,throttle body spacer,Auto lite 3923's,Street scene bumper cover,Stull full billet grill and shell,street scene gen 2 rollpan,Apc clear corners,Apc euro tails,DJM 2inch control arms and 3 inch block,power slot brake rotors
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Demon Dakota
DakotaEnthusiast
6/27/2002
15:34:52
| RE: 5.7L
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Correct me if I'm wrong, but extra gears can't just be programmed if the mechanical ratio does not exist. You can program all you want, but if it doesn't have the "teeth", it's not going to work.
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Rob
GenIII
6/27/2002
15:41:51
| RE: 5.7L
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Message:
Correct me if I am wrong but 45rfe auto does not work with physical gears instead it just adjusts pressure and what not to change the ratio.
CW can explain better
robertshaw 180 thermostat,Z-Tube,Magnaflow stainless exhaust,jet stage 2,throttle body spacer,Auto lite 3923's,Street scene bumper cover,Stull full billet grill and shell,street scene gen 2 rollpan,Apc clear corners,Apc euro tails,DJM 2inch control arms and 3 inch block,power slot brake rotors
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xplikt
Dodge Dakota
JOIN HERE
6/27/2002
16:16:35
| RE: 5.7L
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Message:
f*ck the 45RE, I want the NV5600..
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nuckenfuts
Dodge Dakota
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6/27/2002
16:33:41
| RE: 5.7L
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They are niether programed nor do they physicaly have gears in them, the auto trans. uses power bands and plates. pres. and fluid expansion contribute to the amount of force sent to the tork conv.lokes like a series of diferent sized holes drilled into 4 or 5 different plates within the trans. case. no moving parts w/exception of shift linkage and tork conv.
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FazDak
GenII
6/27/2002
20:35:01
| RE: 5.7L
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Message:
Sorry, yes I was refering to all transmissions behind Magnum V6 and 8 engines.
They specifically stated that if a 5.7 was to be put in a Magnum engined or older mopar that the trans it has behind it from Ma Mopar would have to be there also as no otherbell housing bolt patterns match the new 5.7's.
Scott
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Hersbird
Dodge Dakota
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6/27/2002
21:01:20
| RE: 5.7L
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45RFE and 545RFE are mechanically identical, it is done with the programming. The 545RFE behind the new Hemi may be mechanically different as they are supposed to "beef it up" a bit, but those changes done to the Hemi 545RFE could also be dont to the 45RFE, or a lighter duty 545RFE. The extra gear in the 545RFE is a very low overdrive, it is pretty much useless as it doesn't really add any acceleration, top speed, or feul economy. It just reduces freeway crusing noise that was originally noticed in the Grand Cherokee. It add wear to the transmission just so you don't get a weird droning noise right at 65 MPH. The Dakota is probably way to loud to ever notice the noise found in the Grand Cherokee. The 5-speed automatic is a good marketing tool though, but they need to add a low ratio like found in a 5-speed manual to make it effective, not an extra overdrive.
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CW
GenIII
6/27/2002
21:52:14
|  RE: 5.7L
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With the 45rfe being a trans with only clutches, no bands, applied by solinoids. They apply three planetarys there are actualy somewhere in the neibourhood of eight forward gears that could be applied. Not all eight can be used due to the ratios produced. Clevite 77 45rfe actualy has the same programing as the Jeeps and is a 5 speed. All 2002s are 5 speeds. As Hersbird said it is only a second overdrive that is hardly noticable.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
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sandman
Dodge Dakota
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6/27/2002
22:11:44
|  RE: 5.7L
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THe 45RFE and 545RFE are the same trans essential. The PCM is different and the Chysler version of a valve bodi is proably different. Yes you can program extra gears. You can either do it through electronic programing or hydralic programing in the valve bodie. You can get 6 forward gears out of a GM 4L80E. Ford gets a "soft" fith gear in one of their SUV through programing and the %45RFE is the same thing. The problem I see with the extra "soft" gear is usage. You will be engaugeing and disengaugeing two different clutch packs twice as often or more then you would normaly do. These soft gears are realy just a band-aid fix. The Japanesse and Germans offer true five speed automatics in their luxury cars and the "domestic" name plates are trying to get this in their SUV and other high ticket vechiles before the Jap's or Germans do. To do this quickly they are takeing electronic controled transmissions and reprogaming to creat a fith "soft gear". GM build the five speed transmission that BMW uses in Germany for BMW. GM is useing this true 5 speed in the new CTS. The 545RFE.
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Clevite 77
Dodge Dakota
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6/27/2002
23:10:48
| RE: 5.7L
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thanks guys that's what I thought,
Now I guess the question is, (now it may sound stupid) is the 545RFE that's hooked to the 4.7L HO the same as the 545RFE hooked to the new Hemi?
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4.7RC
Dodge Dakota
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6/28/2002
12:20:51
| RE: 5.7L
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I dont know what you guys are talking about buying a crate motor this baby is gonna be HIGH $$$$. For the money it would cost you could build a much more powerful motor buck for buck. I'm sure the 5.7 will be an awesome motor but I dont think buying it outright would be less than pricey.
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Clevite 77
Dodge Dakota
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6/28/2002
12:34:08
| RE: 5.7L
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yea I hear ya but the 4.7L unless s/c isn't all that powerfull, not to mention what kind of power the 5.7L can pump out with mods. You know some aftermarket dealers will go for the single OHV cam
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Joe123
Dodge Dakota
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6/28/2002
13:13:32
|  RE: 5.7L
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Hey CW,
How do you get your signature banner to post? I tried the conventional <a href> tag that used to work, but it just shows the text. What's the secret?
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Demon Dakota
DakotaEnthusiast
6/28/2002
14:41:00
| RE: 5.7L
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Well I appreciate the information. I have never worked on any modern transmissions (and I guess this is why). I'm used to teeth and gear ratios.
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xplikt
Dodge Dakota
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6/28/2002
19:09:54
| RE: 5.7L
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4.7RC, one of the biggest issues has been the fact this motor costs less to produce than even the 4.7 (which costs less than the 5.2, one of the reasons they left it).
The 5.7L is supposed to get better gas than the 5.9, like 1.5mpg or something, but that's just statisics.
The engine is also lighter and smoother and quieter running than the 5.9.
I personally would love to have it, and a NV5600 in my lil biddy truck -- that, would rock.
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4.7RC
Dodge Dakota
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6/29/2002
14:31:19
| RE: 5.7L
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maybe it is cheap to build, but chrysler isn't going to sell that thing for next to nothing. Its not gonna be as cheap as you guys think. Look at what all of their other crate motors go for. I've got a price list if you want some prices. Try pricing a viper or BB Hemi.
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xplikt
Dodge Dakota
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6/29/2002
21:20:05
| RE: 5.7L
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I don't think it'll be too bad, one of their big reasons of this engine is low cost and long term durability and high efficiency. As for now though, all we can do is wait.
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