aftermarket tranny x member opinions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**bigmac73** · 10-02-2021, 05:22 PM

I bought one of those "Performance" Square tubed x members from GMC Pauls for my transmission thinking it might be beneficial with my new 421SBC installation.

However sizing it up today for installation I find it is around 1/2 inch to short between the frame rails and the bolt holes do not line up, plus it is not centered for the tranny mount. It is a nice heavy piece however it does not quite match the pic on the website as well......

Now i am thinking of just putting a few welds on my factory x member to reinforce the rivets and then just painting and reinstalling. What do you guys think??
Any benefit over the stock piece for performance and strength????

AllGoNoShow · 10-02-2021, 07:34 PM

Can't help you too much with the tranny crossmember. I took out an IFS (Ingenuity Fab and Speed) crossmember that worked well that the previous owner installed (they have been out of stock for a new one for a while now), and installed a TW Fab one which is remarkably beefy (and everything lined up perfectly).

What are the details on the 421 your building?! I've been kicking around that idea myself as well!

jimijam00 · 10-02-2021, 07:45 PM

See if GForce makes one for the C10. I got one of theirs in the Chevelle.

**bigmac73** · 10-02-2021, 07:55 PM

What are the details on the 421 your building?! I've been kicking around that idea myself as well![/QUOTE]

I bought a deluxe short-block from Nyes Racing in Muncie,In comes with a Dart SHP block, Eagle rotating assembly, SRP Pistons 10.5:1 , comp cam 237/246 520/530 lift with 113 LSA .
and I am waiting on a set of heads from Eric Weingartner out of oklahoma. His 195 profilers ported out to 213 CC .

I wanted to go down on the duration slightly around 233/241 and have a 112LSA but Pat McCreery said his cam grinder can not get roller cores. Normally they have Erson custom grinds. So he finally found me a on the shelf comp piece

**bigmac73** · 10-02-2021, 08:00 PM

if i google TW fab i get a hummer website???

jimijam00 · 10-02-2021, 08:03 PM

If you are lucky

**bigmac73** · 10-02-2021, 08:09 PM

G force does make them for a C10

jimijam00 · 10-02-2021, 08:26 PM

I'd buy it if I needed one for my C10. The one in my Chevelle fits like a glove and the 3" exhaust goes right through it.

KQQL IT · 10-02-2021, 08:33 PM

Pull the rail in with a ratchet strap.
The oem frames are super flexible.
And move a bunch

AllGoNoShow · 10-03-2021, 01:43 AM

Quote:

Originally Posted by bigmac73

if i google TW fab i get a hummer website???

lol...Tin Works Fabrication...try that!

bigmac- whats the power output on that 421? Sounds great.

**bigmac73** · 10-03-2021, 07:40 AM

Quote:

Originally Posted by KQQL IT

Pull the rail in with a ratchet strap.
The oem frames are super flexible.
And move a bunch

i might try it.However I matched it up with my factory member and it is defiantly shorter.

**bigmac73** · 10-03-2021, 07:44 AM

Quote:

Originally Posted by AllGoNoShow

lol...Tin Works Fabrication...try that!

bigmac- whats the power output on that 421? Sounds great.

I am shooting for 550 Torque, I told Pat i was not concerned about the HP . If you get the TQ numbers up the HP will follow suit. And I do not really plan on taking it higher that 5800RPM's

68 P.O.S. · 10-03-2021, 10:57 AM

Have you talked to GMC Paul's about this? Confirm you got the right part?

**bigmac73** · 10-03-2021, 01:46 PM

No i have not this thing has been sittinf in my garage for about 6 month or.longer. i cant even find the receipt.

**bigmac73** · 10-09-2021, 11:36 AM

Quote:

Originally Posted by 68 P.O.S.

Have you talked to GMC Paul's about this? Confirm you got the right part?

just found the receipt from Feb. out in the garage cleaning and going though a million parts boxes
going to give them a call and see what is up

Davidf · 10-09-2021, 08:11 PM

I really like the Holley Blackheart crossmember

**bigmac73** · 10-15-2021, 10:21 AM

I will take a look

10-02-2021, 05:22 PM	#1
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	aftermarket tranny x member opinions I bought one of those "Performance" Square tubed x members from GMC Pauls for my transmission thinking it might be beneficial with my new 421SBC installation. However sizing it up today for installation I find it is around 1/2 inch to short between the frame rails and the bolt holes do not line up, plus it is not centered for the tranny mount. It is a nice heavy piece however it does not quite match the pic on the website as well...... Now i am thinking of just putting a few welds on my factory x member to reinforce the rivets and then just painting and reinstalling. What do you guys think?? Any benefit over the stock piece for performance and strength???? __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

10-02-2021, 07:34 PM	#2
AllGoNoShow Registered User Join Date: Feb 2020 Location: Rochester, NY Posts: 200	Re: aftermarket tranny x member opinions Can't help you too much with the tranny crossmember. I took out an IFS (Ingenuity Fab and Speed) crossmember that worked well that the previous owner installed (they have been out of stock for a new one for a while now), and installed a TW Fab one which is remarkably beefy (and everything lined up perfectly). What are the details on the 421 your building?! I've been kicking around that idea myself as well!

10-02-2021, 07:45 PM	#3
jimijam00 Registered User Join Date: Apr 2009 Location: PNW Posts: 553	Re: aftermarket tranny x member opinions See if GForce makes one for the C10. I got one of theirs in the Chevelle.

10-02-2021, 07:55 PM	#4
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: aftermarket tranny x member opinions What are the details on the 421 your building?! I've been kicking around that idea myself as well![/QUOTE] I bought a deluxe short-block from Nyes Racing in Muncie,In comes with a Dart SHP block, Eagle rotating assembly, SRP Pistons 10.5:1 , comp cam 237/246 520/530 lift with 113 LSA . and I am waiting on a set of heads from Eric Weingartner out of oklahoma. His 195 profilers ported out to 213 CC . I wanted to go down on the duration slightly around 233/241 and have a 112LSA but Pat McCreery said his cam grinder can not get roller cores. Normally they have Erson custom grinds. So he finally found me a on the shelf comp piece __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks Last edited by bigmac73; 10-02-2021 at 07:56 PM. Reason: my grammer sucks

10-02-2021, 08:00 PM	#5
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: aftermarket tranny x member opinions if i google TW fab i get a hummer website??? __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

10-02-2021, 08:03 PM	#6
jimijam00 Registered User Join Date: Apr 2009 Location: PNW Posts: 553	Re: aftermarket tranny x member opinions If you are lucky

10-02-2021, 08:09 PM	#7
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: aftermarket tranny x member opinions G force does make them for a C10 __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

10-02-2021, 08:26 PM	#8
jimijam00 Registered User Join Date: Apr 2009 Location: PNW Posts: 553	Re: aftermarket tranny x member opinions I'd buy it if I needed one for my C10. The one in my Chevelle fits like a glove and the 3" exhaust goes right through it.

10-02-2021, 08:33 PM	#9
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,260	Re: aftermarket tranny x member opinions Pull the rail in with a ratchet strap. The oem frames are super flexible. And move a bunch __________________ " That didnt make it any newer " " Dont antique the equipment "

10-03-2021, 10:57 AM	#13
68 P.O.S. Registered User Join Date: Jan 2007 Location: Puyallup, WA Posts: 1,662	Re: aftermarket tranny x member opinions Have you talked to GMC Paul's about this? Confirm you got the right part? __________________ 72 C10 lwb fleetside -stock 350/350 combo

10-03-2021, 01:46 PM	#14
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: aftermarket tranny x member opinions No i have not this thing has been sittinf in my garage for about 6 month or.longer. i cant even find the receipt. __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

10-09-2021, 08:11 PM	#16
Davidf Registered User Join Date: Nov 2014 Location: Austin Posts: 749	Re: aftermarket tranny x member opinions I really like the Holley Blackheart crossmember

10-15-2021, 10:21 AM	#17
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: aftermarket tranny x member opinions I will take a look __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks



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