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Old 09-17-2020, 07:57 PM   #1
Reno
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Cummins Transmission crossmember

Anyone have pictures of their transmission crossmember?

I’ll soon be fitting mine and looking for ideas...I’ll be running a 47RH transmission

Attached photos of my progress - 1972 suburban 4x4 frame, Cummins 12v with Rob Bonney box kit - I’m not the welder.
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Old 09-22-2020, 01:22 AM   #2
Dieselwrencher
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Re: Cummins Transmission crossmember

On my 72 I used 2x4 1/4" wall and made a completely new cross member. Using a stock cross member will be tough because your boxing plates won't allow the stock one to set inside the frame. Unless you plan to bolt it under the frame?
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Old 09-22-2020, 07:19 AM   #3
Stormin08
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Re: Cummins Transmission crossmember

this is what my 2002 ram 2500 cross member looks like

https://www.ebay.com/i/363081831901?...yABEgLKLfD_BwE

much better options out there or fab one to match your rails
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Old 10-29-2020, 07:45 PM   #4
Reno
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Re: Cummins Transmission crossmember

Dieselwrencher -

What did you use then for transmission mount? I’m referring to the rubber mount that buffers vibrations etc
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Old 11-02-2020, 02:16 PM   #5
Dewey72
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Re: Cummins Transmission crossmember

I used square tubing and the stock mount just made a adapter.
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Old 11-20-2020, 01:59 PM   #6
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Re: Cummins Transmission crossmember

I don't like being negative, but i have to ask if you have trial fit the motor in the mounts with the cab and core support in place. I also bought the rob bonney mounts and frame kit and just started assembling it all. If i remember correctly the instructions said to start mount placement 18" ahead of shackle mount. I found that to be about 5" too far forward. Using the 3 holes on top of the frame as reference, the front of the motor mount plates line up with the rear hole. Looking at your pictures, I'm afraid you may be 4-5" too far forward. I hope I'm wrong for your sake, but I had to ask because your pictures don't look like mine.
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Old 11-20-2020, 10:30 PM   #7
Reno
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Re: Cummins Transmission crossmember

In the picture my engine crossmember isn’t welded in place - it’s to be determined where it will go based on test fitting the engine & transmission.

Engine & transmission should be back from the shop & will take it and frame with body bolted to the frame back to fab shop for final fitment.

I’ll post results soon
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Old 11-21-2020, 10:27 AM   #8
v30crewcab
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Re: Cummins Transmission crossmember

I used a stock 84 cucv cross member and dodge mount when I had a 47rh. then when I went to a nv4500 I used my stock 88 cross member and mount.
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