67 - 69 400 crossmember - Impala Tech
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post #1 of 9 (permalink) Old 03-22-2010, 09:08 AM Thread Starter
 
 
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Smile 67 - 69 400 crossmember

Can someone help here. Is the cross-member the same for 67 to 69. I need a T400 cross member for a 69 i do have one from a 67. Will it fit and is there a difference? Help is much appreciated. Thanks
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post #2 of 9 (permalink) Old 03-22-2010, 07:50 PM
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I would say you could use the 67 cross member as the frames are almost identical, but if your replacing a power glide with a 400 you will have to move it rearward about 3 inches as the 400 is longer than the power glide.

http://www.impalas.net/forums/image.php?type=sigpic&userid=521&dateline=14693626  69
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post #3 of 9 (permalink) Old 03-22-2010, 07:53 PM
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And also change out the front yoke as you get the drive shaft shortened. The transmission cross member is the same. TheTH400 is bigger than the PowerGlide.

Big Dave
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post #4 of 9 (permalink) Old 03-22-2010, 08:16 PM Thread Starter
 
 
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Thanks for the info. I know the 400 is longer. Are you saying the cross-member is actually the same for the power glide and the T400. If that were the case then you have the move the mounting position of the c/m rearward on the frame
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post #5 of 9 (permalink) Old 03-22-2010, 08:22 PM
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Yes, It will need moved back for the 400 swap. You may need to wield new side brackets to the frame for the cross member to sit on.

http://www.impalas.net/forums/image.php?type=sigpic&userid=521&dateline=14693626  69
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post #6 of 9 (permalink) Old 03-22-2010, 10:08 PM
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You could bolt it. Make some brackets. If you dont have access to a welder.

Brad
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post #7 of 9 (permalink) Old 03-23-2010, 06:46 AM
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Quote:
Originally Posted by dadstoy View Post
Yes, It will need moved back for the 400 swap. You may need to wield new side brackets to the frame for the cross member to sit on.
Quote:
Originally Posted by A5150 View Post
You could bolt it. Make some brackets. If you dont have access to a welder.
Brad
Because a BBC was available as an option in all Chevrolet big cars after 1965 through 1974 the frame is already set up to accept a TH400 (there is a shelf formed and holes are punched in the frame to bolt it in). This is because you could only get a TH400 or a Muncie behind a big block Chevy.

Big Dave
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post #8 of 9 (permalink) Old 04-13-2010, 07:56 PM
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Crossmember is the same for 67-70, powerglide and TH400.
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post #9 of 9 (permalink) Old 04-14-2010, 10:58 AM
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Quote:
Originally Posted by speedracer03 View Post
Thanks for the info. I know the 400 is longer. Are you saying the cross-member is actually the same for the power glide and the T400. If that were the case then you have the move the mounting position of the c/m rearward on the frame
When they say they are the same they are talking about the years being interchangeable. As there is a difference between a TH400 transmission cross-member and the TH350 /Muncie cross-member. The TH400 cross-member was a bent round tube with the mount welded to it that had the mount only wide enough to clear the pan. A TH350/Muncie cross-member was two pieces of stamped metal welded together that will hit the pan of the TH400 if you try and use it without notching the cross-member first.

Big Dave
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