manual tunnel 2 auto tunnel

Paint, bodywork and fabrication discussion.

manual tunnel 2 auto tunnel

by ejcowboy » Sat Oct 04, 2014 2:37 pm

i want 2 replace my manual tunnel with a auto one (so i can fit a aussie/borg warner box.....can i use a auto crossmember. or do i have 2 modify one ...and do the ribs need 2 be strenghtened....and if i cut out the manual tunnel so far..i'm only going 2 overlap the new tunnel over the old...you wont see it cause it will be smothered in BLACK BODY DEADENER.....any ideas lads + ladettes and does any of this make sense...............CHEERS IN ADVANCE
 
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Re: manual tunnel 2 auto tunnel

by hcap » Mon Oct 06, 2014 1:44 am

The manual floor is quite a bit different from the auto..... If you are just wanting a larger hump for the transmission size I would just cut what you need out of the manual floor and fit the box using a modified gearbox mount being careful of pinion angle. Then you can weld some reinforcing in and fabricate the new floor piece. My engineer wanted to look at the welding of the new floor pan section before any painting or sound deadening was done ....
Hope this helps
 
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Re: manual tunnel 2 auto tunnel

by utility8 » Mon Oct 06, 2014 7:13 pm

Exactly hcap, unless you replace complete floor, sill to sill, you may as we'll use a rolled section to rebuild the tunnel as required.
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Re: manual tunnel 2 auto tunnel

by ejcowboy » Wed Oct 22, 2014 8:15 pm

thanx lads....it looks like ive found a very good auto floor.....so i'm going 2 cut it out/unstitch from pillar 2 pillar....and as far forward as i can go....and as far back as i can go........interesting 2 know that ur engineer wanted 2 see the floor b4 any tar / cover up stuff.........is that normal or he was just a BASTARDO
 
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Re: manual tunnel 2 auto tunnel

by utility8 » Thu Oct 23, 2014 12:19 am

I would have thought that inspection of any work including welds etc., prior to covering them up, would be par for the course for any engineer, particularly when your're replacing most of the floor sill to sill.
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Re: manual tunnel 2 auto tunnel

by hcap » Thu Oct 23, 2014 3:11 pm

I think it is important to know up front what is expected by the engineer so there was no surprises at the 11th hour.
During the whole process I had more grief trying to explain to the young offsider at the roadworthy place that I hadnt removed the vin number and rebirthed the car than I did with the engineer during the whole build! I think I was the victom of the left handed hammer or rainbow coloured paint joke cos the old guy was killing himself laughing in the office listening while I was trying to explain to the young bloke that ej/eh didnt have vin numbers :lol:
 
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Re: manual tunnel 2 auto tunnel

by ejcowboy » Sun Dec 28, 2014 8:29 pm

also can i keep the gearbox section without cutting into it
 
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Re: manual tunnel 2 auto tunnel

by utility8 » Sun Dec 28, 2014 10:37 pm

Don't know what you mean?
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Re: manual tunnel 2 auto tunnel

by hcap » Mon Dec 29, 2014 1:04 pm

This is what I cut out of my ute to fit a trimatic box....I note that rodshop have a trimatic gearbox mount
for a manual floor....I was fortunate enough to have a friendly automatic specialist that lent me an empty box and i used just an old red block for trial fittiing.......Even with all good intentions and 3 trial fits I found that when I went to fit the real thing I still had clearance issues mainly because the trimatic box that I put in the ute had a different bellhousing..and infact some of the extrusions on the box were diferent...I also had fun fitting the speedo cable because of my home made bracket.....Although I have spoken to guys that tell me they got it spot on the first time and good on them.....my experience was that even if I modified something and it works sometimes you have to revisit it in the future to change it ...... but that is why we all play with cars!!!!!...All the blood sweat and tears are worth it tho....on the way to work this morning I started from a standing start at the lights... I wound up the window turned the air on put my foot to the floor and a smile came across my face as I shot away from everyone (up to 100kmh limit of course)...
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Re: manual tunnel 2 auto tunnel

by utility8 » Mon Dec 29, 2014 10:47 pm

I didn't want to continue with a stoush about tunnel sizes that was going on with the Facebook post.
There are only 2 different tunnels in EH's.
Manual & Automatic.
What that guy is on about being 3?.....I have no fucking idea.
He has no clue.
He is simply looking at the manual tunnel & believes it is bigger in commercials......he is wrong.
The whole floor, sill to sill, is different between an auto & manual.
The auto floor actually shapes up from each side to the trans. The tunnel looks reasonably flat & wide.
The manual floor footwell area is flatter giving the tunnel the appearance of being larger.
Hope this clears up thing for you.
Read the posts I put on the Facebook page & if you've got further questions, put them on here. You'll get far better info from guys that have been knocking around with these for years. (With no keyboard jockeys)
Along with many other guys on this forum, I've been rooting around with EH's for near on 35 years.
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