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Author Topic: putting cab from 2wd on a 4wd frame  (Read 19330 times)

Offline gold84gmc

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putting cab from 2wd on a 4wd frame
« on: April 10, 2009, 04:37:47 pm »
besides the hole in the floor for the 4wd selector is there anything different on a cab from a 4wd than one from a 2wd?
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Offline HAULIN IT

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Re: putting cab from 2wd on a 4wd frame
« Reply #1 on: April 10, 2009, 05:28:03 pm »
Yes, The transmission tunnel (depending on the year/tonage) may be different, just behind that (under the front edge of the seat) is higher on the 4x4.  Either a section needs cut out of the 4x4 & put in or a 2" body lift will do. Lorne   
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Offline Laderhosen

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Re: putting cab from 2wd on a 4wd frame
« Reply #2 on: April 11, 2009, 02:32:41 pm »
Quote from: HAULIN IT on April 10, 2009, 05:28:03 pm
Yes, The transmission tunnel (depending on the year/tonage) may be different, just behind that (under the front edge of the seat) is higher on the 4x4.  Either a section needs cut out of the 4x4 & put in or a 2" body lift will do. Lorne   

Would an 82 2wd 3/4 ton have the same tunnel as a 4wd??
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Offline gold84gmc

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Re: putting cab from 2wd on a 4wd frame
« Reply #3 on: April 11, 2009, 02:37:23 pm »
Quote from: HAULIN IT on April 10, 2009, 05:28:03 pm
Yes, The transmission tunnel (depending on the year/tonage) may be different, just behind that (under the front edge of the seat) is higher on the 4x4.  Either a section needs cut out of the 4x4 & put in or a 2" body lift will do. Lorne  

my truck is an 84 and the 4wd frame is an 84 so should it be any different?...they both have 350 engine and th400 tranny
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Offline oldwhity

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Re: putting cab from 2wd on a 4wd frame
« Reply #4 on: April 11, 2009, 03:50:23 pm »
Quote from: Laderhosen on April 11, 2009, 02:32:41 pm
Quote from: HAULIN IT on April 10, 2009, 05:28:03 pm
Yes, The transmission tunnel (depending on the year/tonage) may be different, just behind that (under the front edge of the seat) is higher on the 4x4.  Either a section needs cut out of the 4x4 & put in or a 2" body lift will do. Lorne   

Would an 82 2wd 3/4 ton have the same tunnel as a 4wd??

I think the 4x4 tunnel has an additional hump for the transfer case closer to the seat. If the 4x4 had a 4sp then the hump would be higher.

Quote from: gold84gmc on April 11, 2009, 02:37:23 pm
Quote from: HAULIN IT on April 10, 2009, 05:28:03 pm
Yes, The transmission tunnel (depending on the year/tonage) may be different, just behind that (under the front edge of the seat) is higher on the 4x4.  Either a section needs cut out of the 4x4 & put in or a 2" body lift will do. Lorne  

my truck is an 84 and the 4wd frame is an 84 so should it be any different?...they both have 350 engine and th400 tranny

I believe the frames are the same between 4x2 and 4x4. What is it that your trying to do? Are you going to run your current 2wd drivetrain. If so, I think you'll be fine. If you going to make it a 4wd then you'll need to convert the hump.
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Offline gold84gmc

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Re: putting cab from 2wd on a 4wd frame
« Reply #5 on: April 11, 2009, 05:17:15 pm »
"I believe the frames are the same between 4x2 and 4x4. What is it that your trying to do? Are you going to run your current 2wd drivetrain. If so, I think you'll be fine. If you going to make it a 4wd then you'll need to convert the hump."

i might be getting an 84 gmc 3/4 ton 4wd, the cab is rotted out and has no bed so i want to put my cab and bed on that frame...the parts truck already has a 2 or 3" body lift so i was gonna use that so i wouldnt have to modify my tunnel
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Offline oldwhity

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Re: putting cab from 2wd on a 4wd frame
« Reply #6 on: April 12, 2009, 05:55:15 pm »
Oh ok. So you'll end up with a 3/4 ton 4x4 right?
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Rob G.
81 Chevy K20 4x4 LWB stepside
I enjoy long quiet walks..........in a junkyard!

Offline Irish_Alley

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Re: putting cab from 2wd on a 4wd frame
« Reply #7 on: April 13, 2009, 02:43:11 am »
the frame base is pretty much the same through most years. so your 84 will fit with the body lift no prob
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Offline gold84gmc

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Re: putting cab from 2wd on a 4wd frame
« Reply #8 on: April 13, 2009, 05:18:32 am »
Quote from: oldwhity on April 12, 2009, 05:55:15 pm
Oh ok. So you'll end up with a 3/4 ton 4x4 right?

yes
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Offline Irish_Alley

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Re: putting cab from 2wd on a 4wd frame
« Reply #9 on: April 13, 2009, 05:26:52 am »
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Offline gold84gmc

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Re: putting cab from 2wd on a 4wd frame
« Reply #10 on: April 13, 2009, 05:28:35 am »
Quote from: Irish_Alley on April 13, 2009, 05:26:52 am
Quote from: gold84gmc on April 13, 2009, 05:18:32 am
Quote from: oldwhity on April 12, 2009, 05:55:15 pm
Oh OK. So you'll end up with a 3/4 ton 4x4 right?

yes
But not on paper

right...i want a 4wd because i live in maine and its kinda hard to drive in the snow with a 2wd truck...and id like to go mudding too   ;D
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Offline Captkaos

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Re: putting cab from 2wd on a 4wd frame
« Reply #11 on: April 13, 2009, 10:17:20 am »
You can see the differences in this post:
http://forum.73-87chevytrucks.com/smforum/index.php?topic=11838
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Offline gold84gmc

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Re: putting cab from 2wd on a 4wd frame
« Reply #12 on: April 13, 2009, 06:16:05 pm »
Quote from: Captkaos on April 13, 2009, 10:17:20 am
You can see the differences in this post:
http://forum.73-87chevytrucks.com/smforum/index.php?topic=11838

why do some of those have bolt on covers and some look like they're factory
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Offline oldwhity

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Re: putting cab from 2wd on a 4wd frame
« Reply #13 on: April 13, 2009, 08:55:23 pm »
I think the 4sp trucks have a bolted on hump. My 81 does.
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Rob G.
81 Chevy K20 4x4 LWB stepside
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Offline devious

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Re: putting cab from 2wd on a 4wd frame
« Reply #14 on: April 13, 2009, 11:23:45 pm »
Quote from: gold84gmc on April 13, 2009, 06:16:05 pm
Quote from: Captkaos on April 13, 2009, 10:17:20 am
You can see the differences in this post:
http://forum.73-87chevytrucks.com/smforum/index.php?topic=11838

why do some of those have bolt on covers and some look like they're factory

most of the trucks that came with a manual tranny had a bolt on cover..mainly so you could remove the lever and also fill the trans easier
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