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Transmission crossmember for 6L90 swap

13K views 38 replies 9 participants last post by  cal30_sniper 
#1 ·
Looking for a transmission crossmember that would support a 6L90e, I believe some of the Aussie cars came with 6L90’s
 
#2 ·
I am no expert...

I am almost positive the cross member is the same. I do know it is more common to upgrade the internals of the 80 with 90 parts than it is to do a complete swap.
 
#4 ·
The crossmember isn’t the same and they sell one in Australia - I’ll try to find the link if you don’t beat me to it. I was gonna do the swap before I ended up building my 6L80, met a guy who did the swap and he modified his stock crossmember.
 
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#8 ·
Not sure of the part number, never seen one in person just know by the build sheet that car has the crossmember I need, I hear if it wasn’t from coronavirus having the international shipping screwed up it’s wouldn’t be hard to get from the Assuie guys, almost to the point of just going to a race shop and having one fab’d up
 
#9 ·
I’d love to see a photo of it. Looking at the Camaro parts, the Camaro SS manual and ZL1 auto trans crossmembers look very similar. I wonder if a GXP or SS Sedan manual crossmember could be made to work with some trimming.
 
#10 ·

Couldn’t copy/paste but there ya go
 
#11 ·
So I looked and can’t seem to find it. Trying to get a bead on a site
 
#13 ·
Just waiting to hear back from Australia - it’s around dawn there now
 
#14 ·
Ok so they said I can order from them in Australia - I can order it than you can just get it from me. Sound like a plan? Maybe I’ll order two so that I have one on deck
 
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#21 ·
You are probably right, but I do know shipping from Australia is incredibly expensive

On most calculators you don't need an exact address and I suspect the rates don't vary much from different Australian cities. i.e. It will give you a good idea.
 
#23 ·
If the shipping from down under is anything like it is from Singapore/Hong Kong, you are probably looking at a month.

I was told that because they are so few commercial airliners flying at the moment they is a big shortage of air cargo capacity and thus mail that would normally be placed on airliners has been sent by boat.

Hopefully, someone can be more specific.
 
#24 · (Edited)
Prior to Fedge digging up this info, I ordered a manual trans crossmember from Australia (photo analysis and a lot of hand-waving says the manual trans crossmember is close in mounting location to the 6L90 crossmember, but would require significant trimming to fit). Shipping for that crossmember was $50 USD, and will probably take 4-6 weeks.

If you’re in a huge time crunch, a ZL1 Camaro crossmember is narrower than a G8/PPV/SS crossmember, so some sort of small adapter brackets can likely be welded up to make one fit in an SS. There’s also a guy on the G8board who makes 4L80 conversion crossmembers. An extra plate can be welded to the front of that crossmember to interface with the 6L90 mounting location (photo attached).

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I’m more than happy to wait for a factory crossmember to show up.
 
#36 ·
Looks like it to me....the trans mount holes are back near the rear holes of the crossmember - I prolly shoulda ordered one for myself lol
 
#38 ·
I can confirm that the crossmember fedge ordered for me was a direct fit. ZL1 6L90 dropped right into my PPV using that crossmember. Just had to swap the TCMs out and get the driveshaft shortened a bit by a local shop.
 
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