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Old 08-25-2019, 06:39 PM
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Old 318LA or new 318 Mopar Motor on a 2005 frame

I want to use a 2005 Dodge 1/2 ton frame I found. To update to the newer type of frame, brakes and front end.. But the motor and trans I have is a older style 1977 318 LA and matching Auto trans ( everything is rebuilt). Will I have a problem trying to mount the older motor in the frame? I see that the trans mount looks like I can move it easy forward or back on the frame. And the motor mounts ( newer Hemi motor ) look total different then what I current have. Any info would help on what to do. Thanks

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Last edited by Duker Digers; 08-25-2019 at 06:44 PM. Reason: header
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Old 08-25-2019, 07:50 PM
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You might need to make some frame towers.
There are different style motor mounts.
Look here. They might have something.

https://www.engine-swaps.com/
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Old 08-25-2019, 08:13 PM
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Nevermind I was thinking magnum chassis

Last edited by Hipster_G; 08-25-2019 at 08:20 PM.
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Old 08-25-2019, 09:53 PM
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The Dodge truck frame was a 2005 and had a new style Hemi motor in it and auto trans if that helps. I hope my old 318LA motor and trans will fit. Can the newer style trans bolt up to a older 318LA Motor ?
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Old 08-26-2019, 05:25 AM
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Yes

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Old 08-26-2019, 05:45 AM
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So you are saying that a newer style 4 speed automatic is it called A41 trans ?
Is that the best one to use? Does it have the same gears, but a 30% reduction on the 4 gear on RPM ? thanks
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Old 08-26-2019, 07:08 AM
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Dodge electronics are a nightmare. I'd steer clear of that '05 trans...

Russ
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Old 08-26-2019, 02:24 PM
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Ok , I thought there are company's making 500-600 HP auto trans for Mopars.
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Old 08-26-2019, 04:05 PM
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Try to find an a518 tranny,it has mechanical overdrive.a whole lot better than later model stuff

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Old 08-26-2019, 06:09 PM
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thanks a lot...so how does the mechanical overdrive work...like a regular trans ?

Last edited by Duker Digers; 08-26-2019 at 06:23 PM.
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Old 08-26-2019, 08:59 PM
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Has any one every used this newer 4 speed auto trans to replace 727 by mopar for a 318-360 CI with a motor that has 400- 450 H.P. ?
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Old 08-27-2019, 01:14 AM
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Quote:
Originally Posted by Duker Digers View Post
Has any one every used this newer 4 speed auto trans to replace 727 by mopar for a 318-360 CI with a motor that has 400- 450 H.P. ?
I don't think anybody makes a stand alone controller for the Mopar trans like you find for Chevy 4l60/4l80's.. Like said most times a 518rh or 500rh is used to stay away from the electronically controlled transmissions.

You have quite an unusual project you're undertaking. To put the older body on the new frame you're going to run into quite a bit of it doesn't just bolt together without some modifications/fabrication like the motor mounts.

4-450hp is a pretty tall number for a 318 if that's what you're referring to.
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Old 08-27-2019, 02:06 AM
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Most "newer" dodge transmissions including the 46re(maybe rh)which I believe you have are heavily controlled by the engine pcm. The pcm reads information such as throttle position, rpm, and several other factors to control that transmission.

Frankly I would look at running a 727 if thats what you currently have to get things moving. If you feel you need overdrive upgrading to a 4l80e can handle a good amount of power while being easy to fully control. Plan on around $1200 to bolt up a 4l80e behind that 318 then another $500 for a controller. Plus the cost of the transmission itself.
Which is why if you have the 727 already and are running something like a 91 body I would run that and just be happy going 60ish most of the time.


What body were you planning on running on top of the newer frame?
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Old 08-27-2019, 02:38 AM
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There was a kit out there to convert an re to an rh but I cant remember who was selling it and there was more to it where sourcing the right trans was still the better option.

The 518/46rh can be controlled with a kit such as this.

https://transmissioncenter.net/shop/...iring-diagram/

Last edited by Hipster_G; 08-27-2019 at 02:58 AM.
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Old 08-27-2019, 06:14 AM
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Ok everyone, here is my problem... I am trying to put a 1942 dodge cab and front fenders on a newer frame. The frame that came with it will not work because the trans hits the floor even with cab raised up 4 inches off the frame. This 2005 dodge 1/2 on frame rails are 7-7-1/4 inch thick and the trans mount is flat or I can lower the mount if I need too. ( current 318, 727 trans or a 400 BB) . Unless someone knows a better updated frame to use. Plus the 2005 frame has updated front end and rear end... Any help.... thanks in advance..
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318la, dodge truck, frame swap, hemi motor, mopar

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