Author Topic: Mopar swap  (Read 377 times)

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Offline Steve Wood

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Re: Mopar swap
« Reply #15 on: September 15 2020, 09:02:51 PM »
Looks less good today!  Seems my torqueflite case does not have the boss on it that the column shifter needs to bolt to opposite the frame location.

Pisses me off.  The transmission in the Challenger has it.  go figure.

gonna have to get a bracket made to mount it to, it seems.
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Offline earlbrown

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Re: Mopar swap
« Reply #16 on: September 15 2020, 09:37:22 PM »
Drill and tap for a threaded fitting with a ball end, perhaps?   Like off of a Chebby?
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Offline Steve Wood

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Re: Mopar swap
« Reply #17 on: September 15 2020, 11:41:56 PM »
there does not seem to be an appropriate place to do so.  Assuming that the only difference in the cases between the two cars is the mounting point for the bracket, I think the easiest will be to mock the bracket to the Challenger's transmission and then weld an arm to it that reaches over and bolts to a mounting point for a different linkage point.

it's odd that Chrysler used two different cases with regard to bracket mounts but I looked at a lot of pictures today and have verified that.
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Offline earlbrown

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Re: Mopar swap
« Reply #18 on: September 16 2020, 12:14:44 AM »
I was thinking as long as you know where one should be, you could stick something like this in the housing and make it work.

https://shop.advanceautoparts.com/p/keystone-collision-clutch-pivot-ball-gmk4010951651/11749529-P
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Offline Scoobum

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Re: Mopar swap
« Reply #19 on: September 16 2020, 09:46:50 AM »
Earl, that looks like an easy solution.
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Offline nocooler

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Re: Mopar swap
« Reply #20 on: September 16 2020, 10:25:16 AM »
IhaveaV8

Offline Steve Wood

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Re: Mopar swap
« Reply #21 on: September 16 2020, 10:35:29 AM »
Almost, Jeremy.  Except my linkage hangs down instead of being upward.  It is like I show in the drawing from the manual below.  I originally thought it would work like your drawing and I have that bracket...grea t plans don't survive intial contact!


Here is a diagram from the shop manual.  This pic is for the smaller transmission like I took out, but the the 727 is the same other than the mounting bracket is very short.

Okay, we see the bracket on the frame which I have and we see the torque shaft that goes across to the transmission.  That is like I took out.  It will not work on the new set up because the headers are in the way.  The solution to that is a torque shaft that is made to work with headers and I have that.  It goes up and over the headers and comes back down on the transmission side where it should stick into the bracket that bolts to the transmission.

This is where the problem is.  I have the correct bracket for a 727.  What I don't have is the mounting boss on the 727 case that is going into the wagon so I cannot bolt the bracket to the transmission.

The 727 in my Challenger DOES have the boss-go figure.

If you look at the attached drawing from the manual, you can see the bracket and where it mounts to the transmission.  I just don't have the boss on the case to bolt it to.

My solution is to fab an arm on the bracket and bolt it to a different spot of the transmission so that it ends up in the correct spot but the mounting point has been moved six or eight inches.
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Offline Scoobum

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Re: Mopar swap
« Reply #22 on: September 16 2020, 10:54:56 AM »
Steve...what rear gear is in the car. Wonder if there was an option depending on engine size.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
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TRW .030 Pistons
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Offline Steve Wood

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Re: Mopar swap
« Reply #23 on: September 16 2020, 11:03:45 AM »
I think it has a 3.23 but, I think it is more of a combination of the drivetrains and body styles.  Makes no sense that they left the mounting points off but Chrysler was known for some screwy decisions.

Here is a picture showing what I need in red and what I have in green.  It's either fab a bracket or try to buy the complete linkage as shown in Jeremy's diagram.  Might find it on ebay.
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Offline Steve Wood

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Re: Mopar swap
« Reply #24 on: September 16 2020, 11:07:28 AM »
this would  work if I could find the linkage complete.  I think it would miss the headers anyway LOL

Might have to modify the frame side mount.  Right now, I am trying to avoid pulling the motor and headers cause they ain't no fun
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Offline Steve Wood

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Re: Mopar swap
« Reply #25 on: September 16 2020, 11:50:58 PM »
Okay, not sure if this is going to work but it looks like it may. 

the green line is on the bracket that had no place to bolt on to the transmission due to the missing boss on this case.

The red line is on an L shaped bracket that my neighbor and I made that hangs down from the mounting point in Jeremy's diagram above.

the bracket that had no place to mount is attached to the home made bracket.  It looks like it may work but I ran out of time to connect the linkages with split keys and it popped out of the various holes when I tried to the shifter because it was not held in place...

So, I will have to connect everything properly and see what happens...cros sing my fingers that it works and does not need too much more tweaking...I don't care about ugly because this is almost  impossible to see...but functional is an absolute necessity unless I get mad and cut a hole in the floor and shift it by hand LOL

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Offline daveismissing

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Re: Mopar swap
« Reply #26 on: September 20 2020, 07:39:45 PM »
Looks like a place to use a shifter cable
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Offline Steve Wood

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Re: Mopar swap
« Reply #27 on: September 20 2020, 08:29:39 PM »
I have not seen a shifter cable for a column shift.  I will use a cable for the throttlevalve
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Offline nocooler

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Re: Mopar swap
« Reply #28 on: September 20 2020, 10:24:53 PM »
IhaveaV8

Offline Steve Wood

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Re: Mopar swap
« Reply #29 on: September 20 2020, 11:28:29 PM »
No, they don't and it looks like it needs the same mounting boss that is missing on my 727.  I see it says they can make a custom kit...bet that is more.  

Hopefully, my rigging will work but I am waiting on some replacement nylon grommets that the torque rod pivots in.  the old ones will not stay seated in the brackets.
Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.