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Seeking Photos of the rear engine/transmission cross-member mounting ears
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   Forward Look Technical Discussions -> Transmission and Rear AxleMessage format
 
56D500boy
Posted 2019-01-06 8:20 PM (#576377)
Subject: Seeking Photos of the rear engine/transmission cross-member mounting ears



Expert

Posts: 4148
2000200010025
Location: Lower Mainland BC
For a 55 or 56 Plymouth and/or Dodge and maybe Desoto?

I was out furthering my investigations of a PF to TF conversion and knowing that I would have to move the mount to the rear by about 4", I was trying to figure out how the rear engine/transmission mount cross-member mounted to the frame.

From what I have figured out, there are "ears" welded to the frame (one on each side) to which the cross-member is bolted. I looked through my chassis photos (from other people) and I can sort of see what is going on but I am hoping that somebody could post a detailed photo of the "ears" with the cross-member removed.

This is what I have so far:





(56DodgePowerFliteRearTransMount_PassengerSideFromRear.jpg)



(56DodgePowerFliteRearTransMount_DriversSideFromRear.jpg)



(56DodgePowerFliteRearTransMount_DriversSideFromFront.jpg)



(1955PlymouthChassis_4.jpg)



(56LaFemmeD500BodyOffChassis_WithRearEngineMountRemoved.jpg)



Attachments
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Attachments 56DodgePowerFliteRearTransMount_PassengerSideFromRear.jpg (137KB - 9 downloads)
Attachments 56DodgePowerFliteRearTransMount_DriversSideFromRear.jpg (189KB - 9 downloads)
Attachments 56DodgePowerFliteRearTransMount_DriversSideFromFront.jpg (179KB - 9 downloads)
Attachments 1955PlymouthChassis_4.jpg (245KB - 9 downloads)
Attachments 56LaFemmeD500BodyOffChassis_WithRearEngineMountRemoved.jpg (164KB - 9 downloads)
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56D500boy
Posted 2019-01-13 8:47 PM (#576743 - in reply to #576377)
Subject: RE: Seeking Photos of the rear engine/transmission cross-member mounting ears



Expert

Posts: 4148
2000200010025
Location: Lower Mainland BC
Today, while trying to find info about 56 Plymouth Convertible body mounts for someone here, I bumped into a section in the 55-58 Mopar parts catalogue that I did not know was there. It has some diagrams that get me closer to knowing what I will need to move the trans mount back when I (eventually) install the longer Torqueflite transmission in my 56 Dodge.

BUT I am still hoping for real photos.

This is what I found:



(TransmissionMountRevisions_1.jpg)



(TransmissionMountRevisions_2.jpg)



(TransmissionMountDetail_1.jpg)



(TransmissionMountDetail_2.jpg)



Attachments
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Attachments TransmissionMountRevisions_1.jpg (131KB - 5 downloads)
Attachments TransmissionMountRevisions_2.jpg (102KB - 5 downloads)
Attachments TransmissionMountDetail_1.jpg (81KB - 6 downloads)
Attachments TransmissionMountDetail_2.jpg (68KB - 5 downloads)
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56D500boy
Posted 2019-01-14 11:41 AM (#576767 - in reply to #576743)
Subject: RE: Seeking Photos of the rear engine/transmission cross-member mounting ears



Expert

Posts: 4148
2000200010025
Location: Lower Mainland BC
56D500boy - 2019-01-13 8:47 PM

BUT I am still hoping for real photos.



Ralf N. from Finland was nice enough to send me a couple of photos of his beautiful 56 Dodge Coronet chassis from when he was doing a body-off restoration back in 2010. I can at least see the support better. (Thanks Ralf)





(RalfNFromFinlandsBeautiful56CoronetChassis_1.jpg)



(RalfNFromFinlandsBeautiful56CoronetChassis_2.jpg)



Attachments
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Attachments RalfNFromFinlandsBeautiful56CoronetChassis_1.jpg (239KB - 3 downloads)
Attachments RalfNFromFinlandsBeautiful56CoronetChassis_2.jpg (221KB - 3 downloads)
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56D500boy
Posted 2019-01-15 1:31 AM (#576801 - in reply to #576767)
Subject: RE: Seeking Photos of the rear engine/transmission cross-member mounting ears



Expert

Posts: 4148
2000200010025
Location: Lower Mainland BC
Never mind. Based on Ralf N's photo, I've figured it out how to make new mounting ears for the transmission cross member: out of three pieces, i.e. two side pieces and one top piece with the mirror-image sides welded to the top piece. Biggest issue would be bending the lip on the side pieces.

See attached. I could easily mock the "ear" up in cardboard to test the theory.





(MountEarsDetail_Annotated_small.jpg)



Attachments
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Attachments MountEarsDetail_Annotated_small.jpg (173KB - 3 downloads)
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finsruskw
Posted 2019-01-15 9:47 AM (#576809 - in reply to #576377)
Subject: Re: Seeking Photos of the rear engine/transmission cross-member mounting ears



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Posts: 1894
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Location: Eastern Iowa
Dave, I still have the frame section and the X member from the 57 you got the trans from.
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56D500boy
Posted 2019-01-15 11:52 AM (#576815 - in reply to #576809)
Subject: Re: Seeking Photos of the rear engine/transmission cross-member mounting ears



Expert

Posts: 4148
2000200010025
Location: Lower Mainland BC
finsruskw - 2019-01-15 9:47 AM
Dave, I still have the frame section and the X member from the 57 you got the trans from.


Thanks Dave. The 57-58 cross-member/mounts are different than the 55-56 mounts because of the torsion bar mounting requirements:







(57-58TransmissionMountDiagram.jpg)



(frame58desoto.jpg)



Attachments
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Attachments 57-58TransmissionMountDiagram.jpg (118KB - 3 downloads)
Attachments frame58desoto.jpg (211KB - 3 downloads)
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56D500boy
Posted 2019-01-15 12:26 PM (#576818 - in reply to #576801)
Subject: RE: Seeking Photos of the rear engine/transmission cross-member mounting ears



Expert

Posts: 4148
2000200010025
Location: Lower Mainland BC
56D500boy - 2019-01-15 1:31 AM I could easily mock the "ear" up in cardboard to test the theory.




If only 1/4" steel bent like cardboard and I had a welder, not a hot glue gun.

The next mock-up would be based on measurements, not just eyeballing.

Edited by 56D500boy 2019-01-15 12:29 PM




(56DodgeTransmissionCrossMemberMountingEarMockUp_1.jpg)



(56DodgeTransmissionCrossMemberMountingEarMockUp_2.jpg)



Attachments
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Attachments 56DodgeTransmissionCrossMemberMountingEarMockUp_1.jpg (138KB - 3 downloads)
Attachments 56DodgeTransmissionCrossMemberMountingEarMockUp_2.jpg (114KB - 3 downloads)
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