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-   -   Transmission Crossmember Height (https://forums.maxperformanceinc.com/forums/showthread.php?t=835836)

mrtonegto 11-22-2019 12:06 AM

Transmission Crossmember Height
 
I got ahead of myself in boxing my frame and sectioned my crossmember before I measured it's height to the frame.
I'd like to know the height of the bottom/center of the crossmember, below the trans mount, in relation to a straight line between the bottom of both frame rails.
Hopefully one of you guys can conveniently take the measurement,,,,,:)

Tom Vaught 11-22-2019 12:20 AM

I have a convertible cross-member where I can get you close on the heights.

I will measure it up in the next couple of days and post the info.

Tom v.

mrtonegto 11-22-2019 08:29 AM

Very much appreciated, thanks Tom.

Tom Vaught 11-22-2019 01:00 PM

When I put the transmission cross-member on a flat surface.
(No rubber biscuits on the ends and the cross-member flipped upside down)

A caliper inserted in the Trans Mount holes and measuring from the flat surface to the cross-member bottom surface (now the top most height where the trans mount bolts go thru) measured 2.850" vs the ends of the trans cross-member.

Hope that helps.

Tom V.

mrtonegto 11-22-2019 01:19 PM

Thanks Tom, it appears that the verts CM is configured differently at the ends since it doesnt lay on the frame rails.
How much higher are the ends vs the rails?

Tom Vaught 11-22-2019 07:31 PM

Here is a link to some frame pictures from another website.
I am afraid that I can't help you out as the frames are different where the trans cross-members are mounted.

http://www.squidsfabshop.com/gtoframe/gtoframe.html

In picture #7 you can see that the Convertible/Heavy duty frame (Boxed) locates the trans mission cross-member "pad" at approximately the same height as the hardtop frame. The isolator used in the convertible frame is .375" thick, then the cross-member thickness (.125") then the upper half of the rubber isolator, .375" thick, and finally the retaining bracket that fits over the isolator and holds the cross-member in the correct location.

So I would say that my dimensions need to be offset by the .375" isolator height.

Tom V.

mrtonegto 11-22-2019 09:09 PM

Thanks again Tom, so I would deduct the .375 from your 3.85?

mrtonegto 11-22-2019 09:14 PM

Anyone have a new or previously functional crossmember laying around?

If you could measure the height of the ends when it is layed flat, I believe that would be the answer.

Tom Vaught 11-22-2019 09:59 PM

You need an actual Hardtop/Coupe cross-member to do an accurate measurement like I did on the convertible piece I have. It would be a guess on the actual dimension from my part, based on a picture, mrtonegto.

Tom V.

mrtonegto 11-22-2019 10:56 PM

Totally agree with a roofed car xmember and your method Tom.

mrtonegto 11-24-2019 11:13 AM

:-ohwell::-ohwell::-ohwell:

mrtonegto 11-28-2019 10:18 PM

Measurement
 
1 Attachment(s)
Let's give it another try with Christmas spirit!

Looking for the height of the ends with a Xmember placed on a flat surface as shown:

Attachment 525632

Tom Vaught 11-28-2019 11:25 PM

Since it is Thanksgiving Day, tomorrow, I will remeasure my crossmember the way you have it positioned and give you my end measurements.

Tom V.

mrtonegto 11-29-2019 10:41 AM

Thanks Tom, hope you had a great Thanksgiving!

michaelroy 12-01-2019 12:42 PM

Just wanted to say hello. Long time no see. Are you still building that 65 burgundy coupe? I still have my 65 coupe if you need measurements. I live near Greer now. cell # 704 491 6445.

mrtonegto 12-01-2019 03:38 PM

1 Attachment(s)
Hey Michael, yeah it's been awhile. Doing a frame-off on my coupe, boxing the frame and everything else that keeps you busy, dirty and greasy.....
I'll give you a call[ATTACH].Attachment 525836

Tom Vaught 12-02-2019 02:00 PM

Quote:

Originally Posted by mrtonegto (Post 6085823)
Let's give it another try with Christmas spirit!

Looking for the height of the ends with a Xmember placed on a flat surface as shown:

Attachment 525632

Measuring the way you have the cross-member orientated, I have 2" from a flat surface to the top of the cross-member on one side and 1.900" on the other side. Very hard for a manufacturer to form a piece of steel EXACTLY to the 2" dimension I think.

Tom V

mrtonegto 12-02-2019 02:17 PM

Thanks for taking the time Tom, I'm much more confident on my final sectioning job now.


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