4 SPEED FLOOR HUMP

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Sep 6, 2015 | 04:05 PM

MAP53

Thread Starter

5th Wheeling

Joined: Mar 2015

Posts: 34

Likes: 1

4 SPEED FLOOR HUMP

I am converting my 66 F100, 300C.I. from a 3 speed column shift to a T5. It has gone well so far, the tranny cross member has moved back a bit requiring new holes in the frame but the vertical distance from the bottom of the floor is good. I have the hole cut for the shifter, but I am going to have to modify the floor pan toward the front of the transmission because the tranny is touching the bottom of the floor pan.

My options are to cut the pan to relieve the interference and fabricate a raised plate to put there or to put in a section of floor pan from floor shift truck.

Has anybody got any suggestions or ideas from a previous experience?

Thanks

Mark

Sep 6, 2015 | 06:04 PM

daveengelson

Lead Driver

Joined: Aug 2003

Posts: 6,305

Likes: 18

From: Boulder Creek, Ca

Mark, just a suggestion, if you can salvage a 'high hump' 4 speed access transmission panel perhaps you can modify it to meet your application. The transmission access panel for my 65 with the T18 trans. 'high hump' tunnel, compared to the 65 with the 3 speed on the column, 'low profile' tunnel is considerably different.

I have an access panel from an early model GM passenger vehicle you can have but I would imagine, considering the cost of shipping, it may be more cost effective to fabricate a panel from 16-18 gage sheet metal; it would seems it would require forming a piece of sheet to the contour of the floor panel then drill holes around the parameter for securing the access panel to the floor. Perhaps a member who has refab'ed a panel will chime in and offer suggestions??

Posting pic of the GM trans tunnel access panel, surface rust on the top, I removed a small amount of an undercoating material on the underside of the panel which appears to be in fair to good conditions. Perhaps the pic's will offer idea's?? Seem to recall a 'how to' video on refab. a transmission floor panel but don't remember if it was on a social media forum like facebook, etc?

Sep 7, 2015 | 06:28 AM

MAP53

Thread Starter

5th Wheeling

Joined: Mar 2015

Posts: 34

Likes: 1

So those "high hump" sections are held in with screws? If so one of those would fill the bill probably. If not I think I can form a section of a 2x6 and make a hump that can be welded on to my floor after I cut out the part that is touching the transmission. Thanks

Sep 7, 2015 | 06:35 AM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 785

From: Simi Valley, CA

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