700r4 in 68 chevelle need pic of crossmember - Chevelle Tech
Transmission & Driveline Transmissions and Differentials

 
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post #1 of 14 (permalink) Old Dec 21st, 15, 11:22 AM Thread Starter
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700r4 in 68 chevelle need pic of crossmember

Working on my project 68 chevelle 2 door hardtop. It has a 700r4 in it from previous owner. I was looking it over to make sure everything looks correct and noticed the trans to trans mount has no bolts it it. Under closer observation the trans tail housing is hitting the top of the cross-member and the trans to trans mount is about 1/8 inch away. I want to make sure i have the correct cross-member and trans mount in it before i go any further. A pic of both the cross-member with mounting tab to trans and a pic of the trans mount would be great. Also a part # and part # location for the cross-member would help also.
Thanks
Greg
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post #2 of 14 (permalink) Old Dec 21st, 15, 12:10 PM
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Re: 700r4 in 68 chevelle need pic of crossmember

The mounting tab on the cross member needs to be inverted. Cut it off, turn it over, weld it back on. A stock mount can be used. My 72 cross member was modified like that by the previous owner for a 700R4. I removed it when the 4L80 was installed.

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post #3 of 14 (permalink) Old Dec 21st, 15, 2:57 PM
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Re: 700r4 in 68 chevelle need pic of crossmember

http://www.bing.com/images/search?q=...mber&FORM=IGRE

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post #4 of 14 (permalink) Old Dec 21st, 15, 7:50 PM Thread Starter
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Re: 700r4 in 68 chevelle need pic of crossmember

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Originally Posted by Philip View Post
The mounting tab on the cross member needs to be inverted. Cut it off, turn it over, weld it back on. A stock mount can be used. My 72 cross member was modified like that by the previous owner for a 700R4. I removed it when the 4L80 was installed.
Need pic as mine looks to be modified and possibly not stock
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post #5 of 14 (permalink) Old Dec 21st, 15, 7:51 PM
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Re: 700r4 in 68 chevelle need pic of crossmember

I'll post one tomorrow

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post #6 of 14 (permalink) Old Dec 21st, 15, 7:53 PM Thread Starter
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Re: 700r4 in 68 chevelle need pic of crossmember

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already did that but in google
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post #7 of 14 (permalink) Old Dec 21st, 15, 8:10 PM Thread Starter
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Re: 700r4 in 68 chevelle need pic of crossmember

ok let me clarify. I need a pic of a stock cross member installed on a forum members chevelle. preferably a 68 unless it is the same.
Thanks
Greg
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post #8 of 14 (permalink) Old Dec 21st, 15, 8:12 PM Thread Starter
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Re: 700r4 in 68 chevelle need pic of crossmember

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I'll post one tomorrow
Thank you sir, not even sure if I have the correct rubber mount either.
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post #9 of 14 (permalink) Old Dec 22nd, 15, 9:49 PM Thread Starter
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Re: 700r4 in 68 chevelle need pic of crossmember

help Philip. Here is what i have in the car now by previous owner. It already looks to be modified. I can modify again if i just know what to do. I am better at doing what pics show vs verbal or written instructions.
Thanks
Greg
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post #10 of 14 (permalink) Old Dec 22nd, 15, 10:38 PM
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Re: 700r4 in 68 chevelle need pic of crossmember

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Originally Posted by tx68chevelle View Post
help Philip. Here is what i have in the car now by previous owner. It already looks to be modified. I can modify again if i just know what to do. I am better at doing what pics show vs verbal or written instructions.
Thanks
Greg
Greg that appears to be correct, both the modification and the mount. I have some comparison photos of stock and modified but not installed.

Stock on the right, the modification lowers the mounting point which does not show well in the photo.



Stock on top, the tabs are the same size, photo angle makes them look different.


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post #11 of 14 (permalink) Old Dec 22nd, 15, 10:51 PM Thread Starter
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Re: 700r4 in 68 chevelle need pic of crossmember

well from your info i need a stock cross member with no modification done. Since you state that the modified one lowers the mount which is probably why my trans is hitting the cross member, Correct?
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post #12 of 14 (permalink) Old Dec 22nd, 15, 11:04 PM
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Re: 700r4 in 68 chevelle need pic of crossmember

The tab was probably welded back on too low. Everything else appears to be correct. An Energy Suspension transmission mount is a little taller or you can use some shims between the mount and case to raise it a little if not wanting to cut it off and weld it back on.


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post #13 of 14 (permalink) Old Dec 23rd, 15, 2:20 AM
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Re: 700r4 in 68 chevelle need pic of crossmember

Quote:
Originally Posted by Philip View Post
The mounting tab on the cross member needs to be inverted. Cut it off, turn it over, weld it back on.
Quote:
Originally Posted by Philip View Post
Greg that appears to be correct, both the modification and the mount.
Quote:
Originally Posted by Philip View Post
The tab was probably welded back on too low. Everything else appears to be correct. An Energy Suspension transmission mount is a little taller or you can use some shims between the mount and case to raise it a little if not wanting to cut it off and weld it back on.
Philip is spot on.

The Energy Suspension 1108 is the one every place stocks. It's over 1.9" with steel plate "shim." The 1158 is 0.5" shorter. I am not recommending them, just sharing measurements.

Shims for under the mount can be bought here: http://www.crossmembers.com/shop/cro...set-p-434.html

Philip posted pictures of what I think is and on-top-of-mount GM shim #1254001, 5/32" steel.

It might be easier to find fender washers that take care of the issue under the mount. Lots of GM applications run a single bolt/stud between mount & crossmember, so that's another way to do it. Flame suit on.
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post #14 of 14 (permalink) Old Dec 23rd, 15, 10:25 AM Thread Starter
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Re: 700r4 in 68 chevelle need pic of crossmember

Thanks already made a shim out of 1/4 inch aluminum plate.
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