Automatic trans clearance in first gen F

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May 3, 2009 | 10:41 PM

Wasson

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Automatic trans clearance in first gen F

I am in process of installing a 2004 LS1 (GTO) motor and auto tranny into a 69 Firebird. I used the TCI front subframe kit, which went together well and bolted right on.

Can someone who has done the LS and automatic into a first gen F body let me know if they has issues with the tranny hitting the floor/tunnel? If so, any specific advice?

Thanks.

May 4, 2009 | 07:20 AM

rsz288

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Quote:

Originally Posted by Wasson

4L65E fitted ok but was tight. Then I changed to a 6L90. That needed some clearancing at the top of the tunnel, and a little at the rear. Its tall.

4L65E actually wider at the pan than the 6L90.