Cummins Transmission crossmember - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Reno · 09-17-2020, 07:57 PM

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.

**Dieselwrencher** · 09-22-2020, 01:22 AM

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?

Stormin08 · 09-22-2020, 07:19 AM

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

Reno · 10-29-2020, 07:45 PM

Dieselwrencher -

What did you use then for transmission mount? I’m referring to the rubber mount that buffers vibrations etc

Dewey72 · 11-02-2020, 02:16 PM

I used square tubing and the stock mount just made a adapter.

diesel burner · 11-20-2020, 01:59 PM

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.

Reno · 11-20-2020, 10:30 PM

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

v30crewcab · 11-21-2020, 10:27 AM

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.

09-17-2020, 07:57 PM	#1
Reno Registered User Join Date: Jan 2014 Location: Fort Collins CO Posts: 124	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. Attached Images

09-22-2020, 01:22 AM	#2
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,139	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? __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*

09-22-2020, 07:19 AM	#3
Stormin08 Registered User Join Date: Sep 2018 Location: Moss Bluff, LA Posts: 381	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

10-29-2020, 07:45 PM	#4
Reno Registered User Join Date: Jan 2014 Location: Fort Collins CO Posts: 124	Re: Cummins Transmission crossmember Dieselwrencher - What did you use then for transmission mount? I’m referring to the rubber mount that buffers vibrations etc

11-02-2020, 02:16 PM	#5
Dewey72 Registered User Join Date: Jun 2013 Location: Hubbard OR Posts: 67	Re: Cummins Transmission crossmember I used square tubing and the stock mount just made a adapter. Attached Images

11-20-2020, 01:59 PM	#6
diesel burner Registered User Join Date: Nov 2017 Location: Enterprise Oregon Posts: 59	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. __________________ 71 C10 Cheyenne 396, turbo 400 71 C20 Custom Camper 383,tko 600,14 bolt project 71 K20 Custom,Cummins,NV4500,NP205,dana 60F,dana 80R 06 GMC sierra 2500 extended cab duramax,allison 05 Toyota Corolla (commuter) 18 Chevy Tahoe RST (wifes car) 08 HD Roadglide

11-20-2020, 10:30 PM	#7
Reno Registered User Join Date: Jan 2014 Location: Fort Collins CO Posts: 124	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

11-21-2020, 10:27 AM	#8
v30crewcab Registered User Join Date: Apr 2012 Location: Chatt Tn Posts: 977	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. __________________ 88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.