Problems with Hawks "double hump" T56 crossmember fitment
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From: Greenville WI
Car: 91 Firebird
Engine: Turbo 355
Transmission: T-56
Axle/Gears: 3.73:1 7.625" 10 Bolt
Problems with Hawks "double hump" T56 crossmember fitment
I recently ordered a T56 crossmember from Hawks (double hump style) to replace my spohn crossmember. I can't get this thing to fit for the life of me. The spohn piece I have fits fine as I put it back in the car. Has anyone else had any problems with their Hawks crossmember not fitting? I talked to their tech support and they told me to make sure I had the right holes. So I went back out there just incase I did miss something, and sure enough, it will not fit. Has anyone else had this problem? It's almost like the crossmember is tweaked. If I sent it back and got a new one, do you think it would fit? Luck of the draw? Let me know.
Thanks,
Thanks,
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From: Alabama
Car: 1986 camaro
Engine: ls2
Transmission: FLT stage 6 60e
Axle/Gears: 8.8 with 3.73's
Re: Problems with Hawks "double hump" T56 crossmember fitment
Mine fit perfectly fine.. Gou sure you have it on right? Lol
Thread Starter
Senior Member
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Joined: Oct 2005
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From: Greenville WI
Car: 91 Firebird
Engine: Turbo 355
Transmission: T-56
Axle/Gears: 3.73:1 7.625" 10 Bolt
Re: Problems with Hawks "double hump" T56 crossmember fitment
Yes. I tried it twice. The angles seem to be off.
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Joined: Mar 2004
Posts: 408
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Car: 1984 Camaro
Engine: LS1
Transmission: T56
Axle/Gears: Ford 9"/4.30
Re: Problems with Hawks "double hump" T56 crossmember fitment
I had to modify mine slightly to fit. The angles were fine, but the bolt holes needed to be slightly elongated with a round file to reach true "bolt on" status.
After I got it to fit, I combined my old Spohn and Hawks pieces into one double-hump TQ arm mount crossmember. So far, so good, but only on th street. I know I'll be giving it a good inspection after my first day at the dragstrip.


After I got it to fit, I combined my old Spohn and Hawks pieces into one double-hump TQ arm mount crossmember. So far, so good, but only on th street. I know I'll be giving it a good inspection after my first day at the dragstrip.


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From: Mississauga,Ont,Canada
Car: 89 IROC
Engine: LSX 6.0 370, TU2 Cam, Fast intake
Transmission: T56 w/ lots of goodies
Axle/Gears: 8.8, Posi, 4.10, 31 Spline
Re: Problems with Hawks "double hump" T56 crossmember fitment
Mine was a bit off as well. I just ended up threading in 1 bolt halfway so I could still move it then did one on the otherside. Then did the other 2 and slowly tightend all of them in going around on all of them and it went in. Ive had it off since then and now it sits perfect so I dont need to do the same thing.
Thread Starter
Senior Member
iTrader: (1)
Joined: Oct 2005
Posts: 809
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From: Greenville WI
Car: 91 Firebird
Engine: Turbo 355
Transmission: T-56
Axle/Gears: 3.73:1 7.625" 10 Bolt
Re: Problems with Hawks "double hump" T56 crossmember fitment
Mine was a bit off as well. I just ended up threading in 1 bolt halfway so I could still move it then did one on the otherside. Then did the other 2 and slowly tightend all of them in going around on all of them and it went in. Ive had it off since then and now it sits perfect so I dont need to do the same thing.
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iTrader: (35)
Joined: Aug 2006
Posts: 1,470
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From: Mississauga,Ont,Canada
Car: 89 IROC
Engine: LSX 6.0 370, TU2 Cam, Fast intake
Transmission: T56 w/ lots of goodies
Axle/Gears: 8.8, Posi, 4.10, 31 Spline
Re: Problems with Hawks "double hump" T56 crossmember fitment
MIne seemed the same way but I got it in. Had to move the brake lines aswell as they where in the way. Just put a jack under the tranny to holld it straight so you dont use the crossmember to lift the tranny or you will strip the tranny crossmember bolt holes. Friend of mine did that.
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From: Washington D.C.
Car: 1985 Z28
Engine: LT1
Transmission: T56
Axle/Gears: fourth gen 3.42
Re: Problems with Hawks "double hump" T56 crossmember fitment
Mine didn't look even close to fitting at first, but after moving the brake line and just barely starting a bolt on both sides it pulled into place.
I do remember thinking there was no way it could possibly fit, but I was looking at the wrong holes at first.
I do remember thinking there was no way it could possibly fit, but I was looking at the wrong holes at first.
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From: new phila, oh
Car: 1990 RS
Engine: LS1
Transmission: T56
Axle/Gears: 3.73 9 bolt
Re: Problems with Hawks "double hump" T56 crossmember fitment
I had to modify mine slightly to fit. The angles were fine, but the bolt holes needed to be slightly elongated with a round file to reach true "bolt on" status.
After I got it to fit, I combined my old Spohn and Hawks pieces into one double-hump TQ arm mount crossmember. So far, so good, but only on th street. I know I'll be giving it a good inspection after my first day at the dragstrip.



After I got it to fit, I combined my old Spohn and Hawks pieces into one double-hump TQ arm mount crossmember. So far, so good, but only on th street. I know I'll be giving it a good inspection after my first day at the dragstrip.



Thread Starter
Senior Member
iTrader: (1)
Joined: Oct 2005
Posts: 809
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From: Greenville WI
Car: 91 Firebird
Engine: Turbo 355
Transmission: T-56
Axle/Gears: 3.73:1 7.625" 10 Bolt
Re: Problems with Hawks "double hump" T56 crossmember fitment
When you first fitted the piece in the car did it seem like the angles were completely off? I didn't try starting a bolt on each side yet.
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iTrader: (5)
Joined: May 2009
Posts: 496
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From: Washington D.C.
Car: 1985 Z28
Engine: LT1
Transmission: T56
Axle/Gears: fourth gen 3.42
Re: Problems with Hawks "double hump" T56 crossmember fitment
yeah. visually i thought it was completely wrong. ten minutes later it was installed.
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Joined: Mar 2004
Posts: 408
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Car: 1984 Camaro
Engine: LS1
Transmission: T56
Axle/Gears: Ford 9"/4.30
Re: Problems with Hawks "double hump" T56 crossmember fitment
RickyZ28 - No driveshaft loop, and since I don't really know how its made I can't guess on compatibility.
As for mating the two, it really was that simple.
- Bolt up Hawk's crossmember with trans in place.
- Cut out the Spohn center section, I used a chop saw.
- Use the trans mount bolt to hold cut Spohn piece in place
- Tack weld or mark the pieces where you'd like them to be
- Remove and weld on workbench, add bracing as you see fit.
I am slightly concerned about durability given the 2 frame bolt holes and cantilever TQ arm mount, so its something I'm going to keep a close eye on. I used to cut 1.6 60' times with the standard Spohn setup/383SBC/T56 with no ill effects, so I hope that remains true. The Hawk's piece obviously isn't as durable, but the clearance for the y-pipe is fantastic by comparison.
//thread hijack
As for mating the two, it really was that simple.
- Bolt up Hawk's crossmember with trans in place.
- Cut out the Spohn center section, I used a chop saw.
- Use the trans mount bolt to hold cut Spohn piece in place
- Tack weld or mark the pieces where you'd like them to be
- Remove and weld on workbench, add bracing as you see fit.
I am slightly concerned about durability given the 2 frame bolt holes and cantilever TQ arm mount, so its something I'm going to keep a close eye on. I used to cut 1.6 60' times with the standard Spohn setup/383SBC/T56 with no ill effects, so I hope that remains true. The Hawk's piece obviously isn't as durable, but the clearance for the y-pipe is fantastic by comparison.
//thread hijack
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