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Transmission crossmember?

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Old 03-21-2010, 07:44 PM
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Default Transmission crossmember?

I'm putting a LS1 and 4l60E in my 94 formula. I know the LS1 crossmember does not bolt in so what I was wondering if I need a LT1 auto crossmember or can I use a manual one? I have a manual one but my auto one got lost and ofcourse I have a LS1 auto one also.
Old 03-22-2010, 11:58 AM
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You need the LT1 auto one and grind the hole out for the mount. Check the link in my sig for a pic. That is using the LT1 4L60E so using an LS1 trans it may line up a bit differently.

Last edited by flame; 03-22-2010 at 12:00 PM. Reason: add trans info
Old 03-22-2010, 01:22 PM
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I would use the LT1 Auto Cross Member..and you are going to have to extend the slot in it about 1" to the rear..maybe more. The LS 4L60E Mount sits a little farther behind the LT 4L60E Mount on the Tranny.

A T56 Crossmember would be too far back.

Here is an important question..are you using the LS K-member and Motor mounts?
Old 03-22-2010, 09:56 PM
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Yes i have a stock LS1 k-member with motor mounts
Old 03-23-2010, 12:18 AM
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Ok..just checkin..the Conversion Mounts kick it back about 3/4".

Go with the LT1 Auto Cross Member..you will probably have to extend the slot.
Old 07-07-2010, 10:22 PM
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Ok I bought an auto cross member oblonged the hole put it in and well my trans mount is sitting behind the whole crossmember!! talk about bad luck figures it would be off.. any other suggestions lol... you say the manual one is back further??
Old 07-08-2010, 03:38 PM
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Weld a perch on the rear of the stock crossmember
Old 07-08-2010, 06:16 PM
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Originally Posted by Pocket
Weld a perch on the rear of the stock crossmember
Thats the plan but I just really hate having to do that
Old 07-08-2010, 07:15 PM
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How come? You put a non-stock engine in the car, you have to fudge some things
Old 07-08-2010, 07:50 PM
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Originally Posted by Pocket
How come? You put a non-stock engine in the car, you have to fudge some things
Oh I'm fudging a few things here and there
Old 07-08-2010, 08:46 PM
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You should see what Ive got in store




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