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Old 01-27-2013, 09:26 PM   #1
lil_sahara450r
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aftermarket transmission crossmembers

Hey guys,
looking for opinions on different trans xmembers that are available. I'm swapping out the original 3 speed for a TH400 and I need one. I've looked at the ones from CPP and ECE and wander what y'all would buy (although I typically avoid CPP). Are there any other options out there? Thanks a lot guys!
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Old 01-27-2013, 09:42 PM   #2
ol_skool_chevy
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Re: aftermarket transmission crossmembers

I just ordered this one..........Clean and simple.
http://www.speedwaymotors.com/Straig...ount,3279.html
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Old 01-27-2013, 10:28 PM   #3
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Re: aftermarket transmission crossmembers

Im going to try puting 67-72 crossmember
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Old 01-27-2013, 11:05 PM   #4
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Re: aftermarket transmission crossmembers

I was contemplating this one since I need a parking brake. I ended up not getting it because of price. http://www.bowtieoverdrives.com/cata...php?ITEMID=108

EDIT:
Sorry about that, it's for a 700R4
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Old 01-27-2013, 11:15 PM   #5
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Re: aftermarket transmission crossmembers

Quote:
Originally Posted by ACK View Post
I was contemplating this one since I need a parking brake. I ended up not getting it because of price. http://www.bowtieoverdrives.com/cata...php?ITEMID=108

EDIT:
Sorry about that, it's for a 700R4
Yep $175.00 is pretty steep a price for that
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Old 01-27-2013, 11:53 PM   #6
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Re: aftermarket transmission crossmembers

I have read that the frame width remained the same thru the 73-87 trucks. If you feel like gettin your fingers dirty you can probably find something that will work at a dismantler yard.
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Old 01-28-2013, 02:16 AM   #7
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Re: aftermarket transmission crossmembers

I've never bought an aftermarket trans crossmember. I've always just used an original one from a '63-'87 pickup or Suburban.
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Old 01-28-2013, 03:21 AM   #8
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Re: aftermarket transmission crossmembers

I do have a stock 66 trans crossmember for a 400
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Old 01-28-2013, 03:42 AM   #9
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Re: aftermarket transmission crossmembers

Porterbuilt makes one for the 67-72 for $89 like what I just snapped up http://67-72chevytrucks.com/vboard/s...d.php?t=563187

I imagine he would make you one for your truck for about the same
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Old 01-28-2013, 11:08 AM   #10
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Re: aftermarket transmission crossmembers

My truck crossmember is straight across so I opto to run muffler through the outside of frame. The Ebrake cable runs inside the frame. IMO sometimes it's better something To buy already fabricated vs. Paying to get it fab. I don't have welder.
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Old 01-29-2013, 12:03 AM   #11
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Re: aftermarket transmission crossmembers

I bought a pre-made crossmember with the e-brake mount and added to it. Made just for our trucks.

*http://www.bowtieoverdrives.com/cata...php?ITEMID=108

I canalbized the old crossmember parts from it. Used clevis pins, cotter keys, drilled, bent and made a brass bearing. I didn't use a spring. I have springs on each side on my rear disc brakes. Mocked up clears my 4L85E just fine. Yes I do have a powdercoat problem, my son suggested a 12 step program for me.
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Old 02-19-2013, 01:20 PM   #12
KVB
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Re: aftermarket transmission crossmembers

Quote:
Originally Posted by Captainfab View Post
I've never bought an aftermarket trans crossmember. I've always just used an original one from a '63-'87 pickup or Suburban.
Will a stock crossmember from the 63-87 truck / subrban, bolt in, or is there some drilling or welding to do?

Thanks
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Old 02-20-2013, 02:32 AM   #13
Captainfab
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Re: aftermarket transmission crossmembers

There is no welding necessary, just drilling some holes. How many depends on what trans you are installing as some of the factory holes in the frame may line up.


Quote:
Originally Posted by KVB View Post
Will a stock crossmember from the 63-87 truck / subrban, bolt in, or is there some drilling or welding to do?

Thanks
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Old 02-20-2013, 08:40 AM   #14
KVB
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Re: aftermarket transmission crossmembers

Quote:
Originally Posted by Captainfab View Post
There is no welding necessary, just drilling some holes. How many depends on what trans you are installing as some of the factory holes in the frame may line up.
CaptainFab,

I have a 1965 GMC shortbox with a 230 motor. I have two scenarios in mind. Could you answer some questions I have about them please.

The first is a 700R4.

1. The first cross member back from the motor mounts has to be removed.

2. I have to fit in a another cross member to support the rear of the transmission, 73-87 or aftermarket.

3. Will the transmission fit under an low hump floor

4. If I put in an aftermarket support, how do I make sure the transmission is level. Use a level on the intake manifold? I plan to take a loop off of the coils in the front, to drop the nose a little

5. With a 700R4, I have to pull out the motor and transmission as a unit, as they support each other

The second is a NV3500 or NV4500

6. I keep the first cross member back from the motor, so I can support the bell housing.

7. Will the transmission fit under an low hump floor

8. Is it difficult to setup the hydraulic clutch system.

Another question about power steering, I see that you sell an adapter. What year of truck should I be looking for, to get a power steering box ?

Any other suggestions or ideas you may have about this swap, are greatly appreciated.
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Old 02-20-2013, 12:48 PM   #15
padresag
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Re: aftermarket transmission crossmembers

here is what the stock 64-66 a/t crossmember looks like


the 700r4 will fit under a low hump with a little work to the seam that protrudes down from where the floor meets the firewall
if you ca
nm mount a standard trans to the orig style b/housing that mounts to the orig crossmember you are fine. if you use a later or a/market b/housing that doesn't mount to that c/member then you will have to install a rear trans mount c/member.
if you install a 700r4 you should remove the old bellhousing c/member and install a rear mount one. you can drop the a/t without having to remove the engine. bolt in that rear
crossmember so that it can be either dropped or slid back to ease removing an a/t if it ever has to be done. If removing an a/t in this style of application always remember to remove the distr cap so that it doesn't get broken when the rear of the eng drops a hair when you take the tranny out.
you can't go wrong with the capt's steering box mounting plate
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