T56 Transmission Crossmember? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

502ms · 01-06-2013, 09:29 AM

Hello!

I have a SWB 72 Stepside. Preparing to install LQ4 and T56. I want to ensure I have everything needed for a successful swap.

I was reviewing Shifty's thread on LS1tech.com, and he ran into a snag with his x-member, and recommends oe from Classic. I checked on their website, and only see one for an manual to auto upgrade. Does that one work? Or do I need to fab something up, or are there other options?

Thanks!
Reference:
http://ls1tech.com/forums/conversion...tepside-3.html
Posted via Mobile Device

sbc10guy · 10-26-2013, 01:50 PM

I also have the same question, one of the last things I cannot find anything on. Just wondering if you figured anything out on this?

eric8 · 03-18-2014, 01:05 AM

Any answer on this? I'm at a loss as well with my swap?

Custom 68 · 03-18-2014, 09:54 AM

I just modified my stock 400 turbo cross member. Worked for me...

**Hart_Rod** · 03-18-2014, 10:23 AM

CPP tranny cross member works well.

justahoby · 03-28-2014, 12:18 AM

I used mine that was trimmed for nv4500 on my t56, no mods were needed. I used the two bolt mount, and moved it back

justahoby · 03-28-2014, 12:22 AM

I also modified the skip shift with the shift guide and made my own conversion .. Threw them in my mill and welded .....

you want to retain the reverse lockout so you don't find reverse at 70 mph

the long stick makes it so I don't hook up the solinoid

eric8 · 05-23-2014, 11:22 PM

502ms, any luck?

crazy longhorn · 05-23-2014, 11:43 PM

Set the angles right...I like to see 3-4 degrees down (to the rear) on the eng/trans, figuring the frame level? This is with the weight on the chassis. Up on stands is ok, but with the weight(all the parts on the truck)? Build the crossmember, to give what you want

Longhorn

eric8 · 06-07-2015, 09:51 AM

Any further on the CPP tubular crossmember with the T56? Did it require lots of shimming to get your driveline angle correct?

trkfrk · 06-08-2015, 12:55 PM

Quote:

Originally Posted by eric8

Any further on the CPP tubular crossmember with the T56? Did it require lots of shimming to get your driveline angle correct?

I used the CPP crossmember and it was a direct bolt in with no mods.

trkfrk · 06-08-2015, 01:01 PM

Pic 2

eric8 · 06-08-2015, 01:16 PM

So trkfrk, you are using the older square tube design from cpp and not the tubular, correct? What mounts and perches are you using, and did you get lucky enough to use your factory holes in the frame rails for the crossmember? Looks great!

trkfrk · 06-08-2015, 04:10 PM

Quote:

Originally Posted by eric8

So trkfrk, you are using the older square tube design from cpp and not the tubular, correct? What mounts and perches are you using, and did you get lucky enough to use your factory holes in the frame rails for the crossmember? Looks great!

It must be the older one, I purchased it probably 4 years ago. Same with my motor mounts, they are from CPP also and we're the first design (tubular mounts). I moved my engine back from the factory holes approximately 1". I can't remember for sure, but I believe I did use the predrilled holes in the frame for the trans Xmember. My drivelines is being built now and hoping to test drive the truck this weekend.

eric8 · 06-09-2015, 12:05 AM

Very nice. Wish I was as far along as you. Did you get the 1" setback with adjustable sliding mounts?

01-06-2013, 09:29 AM	#1
502ms Registered User Join Date: Aug 2011 Location: Atlanta, GA Posts: 1,523	T56 Transmission Crossmember? Hello! I have a SWB 72 Stepside. Preparing to install LQ4 and T56. I want to ensure I have everything needed for a successful swap. I was reviewing Shifty's thread on LS1tech.com, and he ran into a snag with his x-member, and recommends oe from Classic. I checked on their website, and only see one for an manual to auto upgrade. Does that one work? Or do I need to fab something up, or are there other options? Thanks! Reference: http://ls1tech.com/forums/conversion...tepside-3.html Posted via Mobile Device __________________ Best Regards, Leon M. Instagram: @TheDirtyDianah Bagged \| 6.0L LS \| T-56 (6-Speed Manual) \| Turbo Burnout/Rolling Video: Chevy C10 Stepside 6.0L LSx & 6-Speed Manual

10-26-2013, 01:50 PM	#2
sbc10guy Registered User Join Date: Sep 2011 Location: Eau Claire, Wisconsin Posts: 415	Re: T56 Transmission Crossmember? I also have the same question, one of the last things I cannot find anything on. Just wondering if you figured anything out on this? __________________ 1969 shortbed c/10 1998 GMC sierra

03-18-2014, 01:05 AM	#3
eric8 Registered User Join Date: May 2013 Location: Utopia Posts: 217	Re: T56 Transmission Crossmember? Any answer on this? I'm at a loss as well with my swap?

03-18-2014, 09:54 AM	#4
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: T56 Transmission Crossmember? I just modified my stock 400 turbo cross member. Worked for me... __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

03-18-2014, 10:23 AM	#5
Hart_Rod ************* Join Date: Apr 2005 Location: Pensacola, FL Posts: 17,858	Re: T56 Transmission Crossmember? CPP tranny cross member works well. __________________ Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3

03-28-2014, 12:18 AM	#6
justahoby Registered User Join Date: Jan 2012 Location: Killeen TX Posts: 52	Re: T56 Transmission Crossmember? I used mine that was trimmed for nv4500 on my t56, no mods were needed. I used the two bolt mount, and moved it back

03-28-2014, 12:22 AM	#7
justahoby Registered User Join Date: Jan 2012 Location: Killeen TX Posts: 52	Re: T56 Transmission Crossmember? I also modified the skip shift with the shift guide and made my own conversion .. Threw them in my mill and welded ..... you want to retain the reverse lockout so you don't find reverse at 70 mph the long stick makes it so I don't hook up the solinoid Attached Images

05-23-2014, 11:22 PM	#8
eric8 Registered User Join Date: May 2013 Location: Utopia Posts: 217	Re: T56 Transmission Crossmember? 502ms, any luck?

05-23-2014, 11:43 PM	#9
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	Re: T56 Transmission Crossmember? Set the angles right...I like to see 3-4 degrees down (to the rear) on the eng/trans, figuring the frame level? This is with the weight on the chassis. Up on stands is ok, but with the weight(all the parts on the truck)? Build the crossmember, to give what you want Longhorn __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

06-07-2015, 09:51 AM	#10
eric8 Registered User Join Date: May 2013 Location: Utopia Posts: 217	Re: T56 Transmission Crossmember? Any further on the CPP tubular crossmember with the T56? Did it require lots of shimming to get your driveline angle correct?

06-08-2015, 01:01 PM	#12
trkfrk Registered User Join Date: Jul 2010 Location: Las Vegas, NV Posts: 969	Re: T56 Transmission Crossmember? Pic 2 Attached Images __________________ Mark 1972 C10 SWB LS1/T56 6 speed trans/4:56 posi with 5.5"-7" static drop/Boss 338 Wheels 18"x20" My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=424609. My first start up http://youtu.be/R899YQ1OcjU

06-08-2015, 01:16 PM	#13
eric8 Registered User Join Date: May 2013 Location: Utopia Posts: 217	Re: T56 Transmission Crossmember? So trkfrk, you are using the older square tube design from cpp and not the tubular, correct? What mounts and perches are you using, and did you get lucky enough to use your factory holes in the frame rails for the crossmember? Looks great!

06-09-2015, 12:05 AM	#15
eric8 Registered User Join Date: May 2013 Location: Utopia Posts: 217	Re: T56 Transmission Crossmember? Very nice. Wish I was as far along as you. Did you get the 1" setback with adjustable sliding mounts?

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