It looks like I'll be getting my oil pan and intake next week. In preparation of getting the oil pan, I thought to summarize my planned setup.
I'm installing a mopar wedge 572", mated to a 4L80E.
The forward edge of the trans tunnel underneath the forward edge of "globey" can be no higher than stock, as I want "globey" to be in the same position.
This is globey:
that mounts under the giant a/c box. Here's how it looked in the Fury originally:
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bluesmobiles.proboards.com/index.cgi#ixzz2LBPFE8xothe trans tunnel rammed right up to it:
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bluesmobiles.proboards.com/index.cgi#ixzz2LBPJ7vZpSo this would be OK:
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The rear of the trans tunnel at the forward edge of the bench seat can be higher than stock, but not higher than the trans tunnel at globey (it can be horizontal all the way back)
It is acceptable for the trans tunnel to be a bit higher underneath the bench seat where nobody will see it.
The seat provides 6" of tunnel clearance in the center, and it's 5" thick (11" total).
Read more:
bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=7#ixzz2LBWHskLSSo this would be ok:
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bluesmobiles.proboards.com/index.cgi?action=gotopost&board=owners&thread=45&post=3836-------------------------------------------------------
Ground clearance: want as much as possible. Here are two pics showing a straight line that limits ground clearance at:
- transmission mount crossmember
- transmission pan
- bellhousing (flexplate cover)
- oil pan
- engine bay crossmember
So the goal is to keep everything at or above that line.
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Here's a 572" wedge mated to a 4L80E
The stock setup (based on the bottom of the trans pan being level is about 5 degrees)
And this keeping this angle, while keeping ground clearance the same, would result in the transmission being moved into globey's space.
Here's how that 572/trans looked in the 74 challenger:
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The transmission pan is as small as reasonably possible on the transmission, as it houses a giant valve body. It looked like maybe there could be some savings by relocating the filter:
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bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=6#ixzz2LBUjVvYKBut the other side has wires and hose hanging down level with the filter, so the pan can't really get any shallower:
This picture is a little deceiving, as the filter is hanging down lower than it would with the pan installed. Installed, the filter doesn't really hang below the hose and wire; they're more at the same level, with the hose and wire to the side of the filter.
Read more:
bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=6#ixzz2LBVUcM57-------------------------------------------------------
So lets say that the forward edge of the trans pan can't get any higher. So that forward edge is a limiting factor on ground clearance. We can pivot the trans/motor assembly around that point. Pivoting the assembly "nose-down" will provide more clearance from the trans to globey.
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bluesmobiles.proboards.com/index.cgi?action=gotopost&board=owners&thread=45&post=34185 degrees nose-down doesn't seem to represent a problem with trans functionality.
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I presented him with the idea of a hypothetical 4l80e application that a friend was investigating about mounting a transmission at a 5 deg nose down orientation in a performance application and asked if this would cause any issues. Without hesitation, he shook his head no and said he sees no reason why that would be a problem, stating that he would just fill the trans to the "full hot" mark while cold. Basically just running it a bit over full just to be on the safe side.
He also confirmed that there is no splash luberication. All he fluid supplied to the trans goes thru the filter port, so as long as you keep enough fluid volume at the filter port the transmission will be fine. I even asked about my remote resivor idea and he said a "dry sump" would technically work however he could not think of why you would want to do something like that.
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bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=8#ixzz2LBYyfuxA-------------------------------------------------------
Let's say that I had tilted the entire assembly 5 degrees down. Ground clearance would look like this if I had a large-diameter flexplate:
engine moved rearward: 4 1/2"
engine lowered: 4 1/8"
ground clearance to engine oil pan: 7 1/2"
ground clearance to flexplate: 7 3/8"
ground clearance to transmission pan: 7 5/8"
Read more:
bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=8#ixzz2LBXo5dYzThat 2x4 mounted forward of the trans pan represents the depth of the flex-plate.
I based that 2x4 depth based on many things, including the belief that the ring gear in the Fury's 727 was 130 tooth and the same diameter, the same size as my mopar-block-to-4L80E GM transmission flexplate.
But it turns out the pic above was based on using a large diameter flexplate as used in my original 727.
www.allpar.com/mopar/transmissions/identifying-torqueflites.html> The 727 used either a 10.75" or an 11.75" converter
Mine had to be the 11.75", as there certainly wasn't room for anything larger:
Read more:
bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=8#ixzz2LBYS3Fb4My 4L80E conversion flexplate was the smaller diameter version:
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bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=8#ixzz2LBYaqmPqMan, that gave me 3/4" of an inch! So we're back to where I expected, that the trans pan is the lowest hanging point.
Read more:
bluesmobiles.proboards.com/index.cgi?board=owners&action=display&thread=45&page=8#ixzz2LBYgB6qoHere's the oil pan that the fab guy made:
It was 2.5" deep in the front (top of mounting surface to bottom of interior of pan), and 4.5" deep in the back.
A far cry from the 1.2" and 3.5" I specified:
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bluesmobiles.proboards.com/index.cgi?action=gotopost&board=owners&thread=45&post=4117When I placed the order, I asked him to let me know if there would be a problem with rod bolt clearance at 1.2", and he seemed to have ensured there was no problem by doubling the clearance. Since putting in the order with him last year, I found the clearances from the motor guys:
> Rod bolt depths beyond the pan rail: 1.225”
> From the timing cover face to the first rod bolt: 4.100”
So recently when I had him redo the pan, I specified 1.5" deep in the front and 3.5" in the back. Here's pics of the latest:
Clearance from the motor to the forwardmost pickup tube shouldn't be an issue, as he located it underneath the main cap.