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Old 06-12-2011, 03:21 AM
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Transmission crossmember

I am working on a 1956' chevy pick up. i am slammin' it to the ground, well i noticed that the transmission crossmember sits lower than the frame, anyways i am going to have to move the crossmember back a little bit for the trans i am getting(700R4) well what i am curious to know is that will the transmission sit higher than the original transmission? because i would like to fab up a more low profile crossmember if i can. any input would be much appreciated
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Old 06-12-2011, 06:19 AM
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Trans mount position should be the same. You need to make sure the Rear Pinion angle and Trans angle isn't too far off. The Trans is normally 2*-3* down so Rear needs to be close to the opposite 2-3* up.
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Old 06-12-2011, 11:37 AM
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Sounds like your talking about the crossmember that goes under the bellhousing for the rear motor mounts I think ???? You will need to cut that one out and fab up a new one for the automatic trans farther back on the frame. You will also need to have the engine on side motor mounts, because the distance from stock front motor mounts to the new trans mount is to much causing stress on trans bellhousing mounting bolts.
The auto trans crossmember won't hang as low as the stock rear mount crossmember
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Old 06-12-2011, 12:57 PM
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thank you very much 57halfton, that is all i wanted to know, that the auto trans wont hang as long as the stock trans, and yes it is the cross member that is under the bell housing.
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Old 06-12-2011, 03:31 PM
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Just cut out the cross member under the bellhousing. Does your engine have stock front motor mounts or been updated with side mounts ? What engine does your pickup have in it ?
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Old 06-13-2011, 09:40 AM
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its going to have a a new 383 in it, looks like side motor mounts to me on the new one, the old motor has front motor mounts.
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