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Has anyone cut the tunnel?

I am going to be doing another engine drop and the most difficult part is getting the shift rod to clear the opening at the back of the tunnel.

This got me thinking, if I cut a 4"x 2" section out of the bottom the engine and tranny could then be lowerd straight down and out of the car. A small plate could be made to cover the opening when everything is in and secure.

Is this a key area of the tub that sould not be modded? My thought is that since the tranny support/mounting plate is right behind this area that it would not degrade the strength of the tub.

Your thoughts?
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Old 11-01-2005, 12:37 PM
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sounds like an old scca racer trick we've seen. besides being careful with the cables, fuel lines, and electrical- we don't see a problem. Especially if you make a strong frame to support your cover. That would restore and strength along the seam
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Old 11-01-2005, 12:45 PM
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Structural integrity - it is part of the backbone of the car.
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Old 11-01-2005, 12:45 PM
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it'll be an issue if you ever sell it.
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Old 11-01-2005, 12:51 PM
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Your car is a '75, so it should have the little eyebrows that connect the top of the center tunnel to the torsion tube. That should take care of any strength issues.

But I think I agree with John Walker on the issues with resale value. Most people frown upon drilled and sawzalled cars.
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Old 11-01-2005, 01:05 PM
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Fuel lines, cables, wiring harness all very tightly packed in there. I'd not risk it. Getting the shift rod to clear the tunnel has never been a problem for me...maybe you need taller jackstands?
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Old 11-01-2005, 01:23 PM
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This is taken from the www.gunnarracing.com site

http://www.gunnarracing.com/project/Martini/MartiniRSR-1119.htm

While sort of unrelated, this was for a " special magnesium transmission".






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Old 11-01-2005, 02:08 PM
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Quote:
Originally posted by Tyson Schmidt
Most people frown upon drilled and sawzalled cars.
this is group B we are talking about here. the scars from such carnage are worn like badges of honor in that circle.
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Old 11-01-2005, 03:12 PM
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Old 11-01-2005, 03:30 PM
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I think that is why the front of my rebuilt '72 915 transmission has an aluminum cover supporting the shift rod. Looking at the oblong hole for the shift rod into the tunnel on my car, my guess is the PO got the shift rod hung up in the tunnel and cracked the mag cover.
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Old 11-01-2005, 05:20 PM
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Search for posts on "tunnel" I have posted pictures of what the interior of the tunnel looks like sometime within the last year. Lou
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Old 11-01-2005, 05:42 PM
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I tried unsucessfully to find the thread where someone posted images of a complete tunnel removed from the pan. Does anyone have that link?

Best,
Grady
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Old 11-01-2005, 08:36 PM
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Old 11-01-2005, 08:57 PM
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thank you all for the responses. I am not looking to cut out that much...just the width of the circle opening down and then a few inches into the tunnel.

Maybe you guys at TRE have some other ideas, when I pull the 3.6 it's a big PITA to get the engine/tranny back enough in the car to clear the shift rod. The fan housing hits the back of the car and at that point the shift rod is still about 1" inside the tunnel. So to get the engine out it takes a sissor lift, tranny jack, jack stands, and two or three guys assisting.

It seems that I have had to drop the engine/tranny at least once a year so why not make it a little easier. =o)
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Old 11-01-2005, 09:44 PM
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HI

When I drop the engine from my SC I always remove the fan-housing first, takes some time but it gives me enough room to get the shift rod out and in again.
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Old 11-02-2005, 12:04 AM
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Thanks Erik...that was one thing I was considering to do the drop this time. Still think a notch in the tunnel would make things easier down the line in future drops.
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Old 11-03-2005, 08:52 AM
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K9handler - I like your idea. Please post your efforts here.
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Old 11-03-2005, 06:55 PM
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I bought myself a Pallet Truck, with the back of the car jacked up to clear the engine, the angles are perfect and the engine just slots right in. I bought mine for 32 and it was the easist engine fit I've ever carried out.
Old 11-03-2005, 10:00 PM
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HD - did you ever do this??
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Old 08-11-2006, 06:29 AM
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Rob, what muffler is that?
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Old 08-11-2006, 06:49 AM
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