Reproduction Auto Trans Crossmember - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Bob B.** · 01-05-2025, 10:03 PM

Anyone have any experience with these? Hard to install?

Willshook · 01-05-2025, 11:10 PM

I installed this one on my ‘72; fit perfectly.

https://classicperform.com/cp9427

I had to sawzall the old one out; even after removing all the bolts I couldn’t slide it out.

**Bob B.** · 01-06-2025, 12:41 AM

I have been looking at that style of crossmember. The OEM type is also available as well:

https://www.classicindustries.com/pr...s/t677205.html

**Palf70Step** · 01-06-2025, 07:33 AM

This is the one I'm using in my 70. It seems to fit well, but I don't have the tranny in the truck yet.

https://www.ebay.com/itm/193432100723

**PbFut** · 01-06-2025, 12:34 PM

Pretty good Price at summit.
https://www.summitracing.com/parts/sum-770580
I found it allows for a way easier job dropping the tranny pan for service. With the factory unit, I had to unbolt and slide the member back to have enough room. This aftermarket part can remain in place while performing service. It does not have and attachment to the top of the frame rail like factory. So if you are concerned about a rail twisting, the added support is no longer there. I've found no issue but I've not worked the truck that hard since install a couple years back.

Willshook · 01-06-2025, 12:58 PM

For sure easier to drop the pan - and makes a LOT of room for an aftermarket exhaust. The stock crossmember didn't leave room for my Magnaflow exhaust.

**guyryan100** · 01-06-2025, 02:19 PM

I have always wondered if the crossmember plays any real structural role other than holding up the transmission, that might be reduced with the aftermarket options that only bolt to the bottom of the frame.

To get my 700r4 transmission pan off, I unbolt the transmission mount, jack up the tail shaft and get a wrench into the pan bolts, use a pump to remove the fluid via the filler tube, and wiggle the empty pan out from the crossmember - the aftermarket crossmember would make that so much easier!

**Bob B.** · Yesterday, 01:34 PM

It might, but it's pretty close to the large crossmember that the trailing arms attach to.

Cal10 · Yesterday, 06:14 PM

I have one of these sitting in my garage. It’s yours free if you want it, it fit my truck well but didn’t clear the shift linkage on my Muncie. (It’s made for automatics, I just hoped I could make it work) https://www.crossmembers.com/product...ember-rcc-10-2
Posted via Mobile Device

01-05-2025, 10:03 PM	#1
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,373	Reproduction Auto Trans Crossmember Anyone have any experience with these? Hard to install? __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

01-05-2025, 11:10 PM	#2
Willshook Registered User Join Date: Jun 2019 Location: Chehalis, WA Posts: 89	Re: Reproduction Auto Trans Crossmember I installed this one on my ‘72; fit perfectly. https://classicperform.com/cp9427 I had to sawzall the old one out; even after removing all the bolts I couldn’t slide it out.

01-06-2025, 12:41 AM	#3
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,373	Re: Reproduction Auto Trans Crossmember I have been looking at that style of crossmember. The OEM type is also available as well: https://www.classicindustries.com/pr...s/t677205.html __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

01-06-2025, 07:33 AM	#4
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,266	Re: Reproduction Auto Trans Crossmember This is the one I'm using in my 70. It seems to fit well, but I don't have the tranny in the truck yet. https://www.ebay.com/itm/193432100723 __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 01-06-2025 at 02:39 PM.

01-06-2025, 12:34 PM	#5
PbFut Senior Member Join Date: Feb 2022 Location: Ca Posts: 639	Re: Reproduction Auto Trans Crossmember Pretty good Price at summit. https://www.summitracing.com/parts/sum-770580 I found it allows for a way easier job dropping the tranny pan for service. With the factory unit, I had to unbolt and slide the member back to have enough room. This aftermarket part can remain in place while performing service. It does not have and attachment to the top of the frame rail like factory. So if you are concerned about a rail twisting, the added support is no longer there. I've found no issue but I've not worked the truck that hard since install a couple years back.

01-06-2025, 12:58 PM	#6
Willshook Registered User Join Date: Jun 2019 Location: Chehalis, WA Posts: 89	Re: Reproduction Auto Trans Crossmember For sure easier to drop the pan - and makes a LOT of room for an aftermarket exhaust. The stock crossmember didn't leave room for my Magnaflow exhaust.

01-06-2025, 02:19 PM	#7
guyryan100 Registered User Join Date: Sep 2001 Location: Cumming, GA Posts: 485	Re: Reproduction Auto Trans Crossmember I have always wondered if the crossmember plays any real structural role other than holding up the transmission, that might be reduced with the aftermarket options that only bolt to the bottom of the frame. To get my 700r4 transmission pan off, I unbolt the transmission mount, jack up the tail shaft and get a wrench into the pan bolts, use a pump to remove the fluid via the filler tube, and wiggle the empty pan out from the crossmember - the aftermarket crossmember would make that so much easier!

Yesterday, 01:34 PM	#8
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,373	Re: Reproduction Auto Trans Crossmember It might, but it's pretty close to the large crossmember that the trailing arms attach to. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

Yesterday, 06:14 PM	#9
Cal10 Registered User Join Date: Feb 2022 Location: Fairfield, CA Posts: 56	Re: Reproduction Auto Trans Crossmember I have one of these sitting in my garage. It’s yours free if you want it, it fit my truck well but didn’t clear the shift linkage on my Muncie. (It’s made for automatics, I just hoped I could make it work) https://www.crossmembers.com/product...ember-rcc-10-2 Posted via Mobile Device



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