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Gbody lsx th400 trans mount

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Old Oct 4, 2011 | 08:20 PM
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Default Gbody lsx th400 trans mount
does anyone offer this. i checked brp but they only offer it for 4l60s and t56s.
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Old Oct 4, 2011 | 10:36 PM
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I bet you can make the T56 one work for a TH 400..
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Old Oct 5, 2011 | 12:00 AM
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I think the 200r4 transmission crossmember should work just fine. A th200r4 is 27" from the bellhousing to the mount and a th400 is 26 and 15/16" .
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Old Oct 5, 2011 | 12:13 AM
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Originally Posted by G-Body
I think the 200r4 transmission crossmember should work just fine. A th200r4 is 27" from the bellhousing to the mount and a th400 is 26 and 15/16" .

i bought my gn with a th400 in it and it seems that the previous owner rigged up a 200r4 mount to work with the th400 and now with the ls and brp engine mounts only one bolt hold lines up.


im also wondering if an ultrabell would make a difference but im pretty sure the trans still holds oem length.


Originally Posted by the_merv
I bet you can make the T56 one work for a TH 400..
i dont feel like betting with a 100 dollar mount so unless you KNOW it works ill keep reading and searching.
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Old Oct 5, 2011 | 01:26 AM
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I got the Jegs 700R4 Double Hump one in my MCSS holding up a T56 with no modification to the Crossmember..anything is possible, there is a pretty good amount of room under these cars.
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Old Oct 5, 2011 | 10:21 AM
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If nothing else the side mounts could be cut and rewelded to fit perfect.
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Old Oct 5, 2011 | 08:40 PM
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thanks guys ill going go under the car again and see if i cant make it line up with some fab work,

to be clear tho its the trans MOUNT thats the issue not the crossmember.
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Old Oct 6, 2011 | 01:25 AM
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If you are talking the rubber trans mount then it is different. Just go pick up a energy suspension polygraphite one if your looking for a performance one (Its slotted so it fits all the GM transes) or if your looking for a stocker, pick up a transmission mount for a 1978 buick electra 225 with the 5.7l. That had a th400 and the mount was the same height as a g-body mount.
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Old Oct 8, 2011 | 01:18 PM
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Originally Posted by G-Body
If you are talking the rubber trans mount then it is different. Just go pick up a energy suspension polygraphite one if your looking for a performance one (Its slotted so it fits all the GM transes) or if your looking for a stocker, pick up a transmission mount for a 1978 buick electra 225 with the 5.7l. That had a th400 and the mount was the same height as a g-body mount.


thank you
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