Author Topic: I need an education on factory transmission crossmember differences  (Read 1657 times)

cboss70

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I am in the process of restoring individual parts for a 67BB 4spd, 69SB AT and a 70 Boss 4spd. I have a number of cross members with slight differences and am not sure what goes to what. If you look at eB a lot of ad's say everything fits 67-70 so that lessens my trust in the sellers as a whole.  I have a few versions, 1. One looks like a standard 67-70 contours but has two maybe 1/4 holes drilled through the center lip
2. Have others with no little holes as above
3. A couple where one side of the cutout goes in further on one side (mounting bolt to body mounting cut out area)  and the transmission mount slots in the center are more elongated than on 1 and 2
4. The last one has two frame mounting holes on one side and one on the other- probably fmx/c6 69/70.

I'm more familiar with the 65/66 which are basic but these have me second guessing myself. Can someone shed light on the "visual" differences between the year and applications? 

Special Ed

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Re: I need an education on factory transmission crossmember differences
« Reply #1 on: December 05, 2019, 09:09:15 AM »
67 - 68 big blocks 4 speed have 390 std stamped on them and are very hard to find that don't have pitting and 69-70 big block 4 speed has 390 std and 250 stamped on it with longer holes and are hard to find and no repo made. 69 351 w auto is stamped 351 and c6 big blocks are 3 hole type triangular shape also hard to find. 67-70 small block 4 speeds are easy to find and are thinner metal and not as tall and heavy as big blocks. We have some photos on our ebay store of these.
« Last Edit: December 05, 2019, 09:11:06 AM by Special Ed »

kingchief

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Re: I need an education on factory transmission crossmember differences
« Reply #2 on: December 05, 2019, 10:19:40 AM »
Might be interesting to post 65/66 stuff also.

Just asking for info.

Steve
SFM 6S406

TLea

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Re: I need an education on factory transmission crossmember differences
« Reply #3 on: December 05, 2019, 08:39:50 PM »
Ed the late 68s with 2 1/4 exhaust (cj) also use the 69 style with the 250 stamp   Slotted holes also longer than 390 version

69mach351w

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Re: I need an education on factory transmission crossmember differences
« Reply #4 on: January 17, 2022, 07:08:55 AM »
I understand this is an old thread, but I found a cross member and wonder if it is a C6 A/T cross member. Thanks for any help.

Special Ed

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Re: I need an education on factory transmission crossmember differences
« Reply #5 on: January 17, 2022, 07:42:15 AM »
Looks made up to me not factory

69mach351w

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Re: I need an education on factory transmission crossmember differences
« Reply #6 on: January 17, 2022, 07:51:20 AM »
That's was I was thinking to Ed. WCC has a repop looks just like this one.
Appreciate it  ;)

68stangcjfb

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Re: I need an education on factory transmission crossmember differences
« Reply #7 on: January 17, 2022, 11:54:55 AM »
Here are a few pictures of a C6 crossmember.
68 1/2 CJ Mustang GT FB auto 3.91s, 68 1/2 CJ Torino GT FB 3.91s, 60 Thunderbird, 64 Falcon Sprint conv. 4Spd, 65 Falcon Sedan Delivery, 67 Fairlane 500 SW 428 4Spd, 68 Torino 4dr, 95 Thunderbird SC. 89 F250 Supercab 2wd, 99 Sable, 99 Jeep Cherokee.