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Old 06-13-2012, 11:17 AM   #1
dbruhn
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73-87 high rise transmission tunnel

Where can I locate a high rise transmission tunnel for a 1978 cab. I am converting a 2wd 3 on the tree to a 4wd 4-speed.
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Old 06-13-2012, 12:06 PM   #2
notyo_cheez
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Cool Re: 73-87 high rise transmission tunnel

I'll trade cabs with you. Logistics might be difficult, though. Mine came from a 83-87 that has the 4wd hump with the embossed area for the 4-speed shift and cutout for the transfer case shifter.
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Old 06-14-2012, 02:25 PM   #3
beamn7
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Re: 73-87 high rise transmission tunnel

What are you going to do with the, linkage, shifter and trans? Might be interested........ (I assume you will be leaving the column in....)
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Old 06-14-2012, 03:16 PM   #4
cory d
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Re: 73-87 high rise transmission tunnel

look in jubk yards or on craigslist for people parting trucks out. theres plenty out there
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Old 06-14-2012, 03:22 PM   #5
dbruhn
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Re: 73-87 high rise transmission tunnel

I have the column for the 4WD to swap out with the column shifter. Everything is good except for tunnel. Any idea how much of a lift would be required if I leave the low rise tunnel in it?
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Old 06-14-2012, 10:32 PM   #6
88Jimmy4x4
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Re: 73-87 high rise transmission tunnel

just add a body lift, 3" max
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Old 06-15-2012, 07:05 AM   #7
xrcr
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Re: 73-87 high rise transmission tunnel

I have one that I'd sell
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Old 06-15-2012, 01:25 PM   #8
dbruhn
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Re: 73-87 high rise transmission tunnel

A tunnel or a lift kit?
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Old 06-15-2012, 03:48 PM   #9
xrcr
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Re: 73-87 high rise transmission tunnel

Tunnel. It's out of a 76 3/4 2wd 4spd
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Old 06-18-2012, 08:46 AM   #10
dbruhn
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Re: 73-87 high rise transmission tunnel

Will that tunnel work for the 4wd/4sp conversion? I actually have the ability to get one from a standard shift 3/4 ton truck.
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Old 06-19-2012, 08:10 AM   #11
dbruhn
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Re: 73-87 high rise transmission tunnel

If I can use a tunnel out of a 2wd 3/4 ton standard shift truck then I am set. Let me know if this will work.
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Old 06-19-2012, 02:02 PM   #12
xrcr
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Re: 73-87 high rise transmission tunnel

I'm not sure, I don't know where 4wd shifter comes through in relationship to the tunnel.
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Old 08-13-2015, 02:30 AM   #13
Stocktongoodrepair
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Re: 73-87 high rise transmission tunnel

Quote:
Originally Posted by xrcr View Post
I have one that I'd sell
Im looking for a High Hump Transmission Cover for 73-87 Chevy GMC truck 2wd

Ebay just sold one minutes before I logged on ... Or some place to buy one.


Last edited by Stocktongoodrepair; 08-13-2015 at 02:40 AM. Reason: It looked terrible
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