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Old 10-29-2013, 04:29 PM   #1
70ptta
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What auto trans for a 8.1 vortec swap

Hey guys I'm going with an 8.1 vortec in my 72 4x4. I want to keep it auto. Would I need to look for a 4l80e from a 4wd truck or will the 2wd version work?
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Old 10-29-2013, 07:25 PM   #2
truckdude239
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Re: What auto trans for a 8.1 vortec swap

2wd will work if you want a 2wd drive only you'll need 4wd one
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Old 10-29-2013, 07:51 PM   #3
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Re: What auto trans for a 8.1 vortec swap

is there any way to make a 2wd trans work in my 4wd. my truck is 4wd right now
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Old 10-29-2013, 08:06 PM   #4
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Re: What auto trans for a 8.1 vortec swap

Is there a was? Yes, with the right output shaft and extension/adapter.

What transfer case do you plan to use?
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Old 10-30-2013, 03:41 AM   #5
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Re: What auto trans for a 8.1 vortec swap

Yeah you can make it work. But you have to change a few things. You should be able to google it.
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Old 10-30-2013, 05:43 AM   #6
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Re: What auto trans for a 8.1 vortec swap

what trans is in it now?...you could jus have that one rebuilt..unless you jus wanna go with OD trans..
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Old 10-30-2013, 09:29 AM   #7
70ptta
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Re: What auto trans for a 8.1 vortec swap

not sure what transfer case im going to use and right now i have a th400 but i do want to switch to the overdrive
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Old 10-30-2013, 03:02 PM   #8
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Re: What auto trans for a 8.1 vortec swap

If you don't know the difference between a 2wd and 4wd trans you probably shouldn't be attempting this swap on your own.
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Old 10-30-2013, 07:41 PM   #9
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Re: What auto trans for a 8.1 vortec swap

jon i never said i dont know the difference im trying to find out if i can make a 2wd trans work cause thats what i could get a hold of right now. and thats what forums like this are for bud to learn
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Old 10-30-2013, 08:35 PM   #10
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Re: What auto trans for a 8.1 vortec swap

I'll skip all the technical stuff.
Is it possible, yes.
Is it practical, worth it, normal, or something that anyone here would have an interest in doing...no.

www.car-part.com if you can't find a 4wd trans there, then your lying to me.
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Old 10-30-2013, 08:13 PM   #11
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Re: What auto trans for a 8.1 vortec swap

I didn't mention, the output shaft replacement requires extensive tear down of the transmission.
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Old 10-30-2013, 11:22 PM   #12
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Re: What auto trans for a 8.1 vortec swap

so im going to see if he'll sell the engine only and look for a 4wd 4l80e. thanks guys
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Old 10-31-2013, 12:37 AM   #13
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Re: What auto trans for a 8.1 vortec swap

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Originally Posted by 70ptta View Post
so im going to see if he'll sell the engine only and look for a 4wd 4l80e. thanks guys
or buy it complete and sell the 2wd 4l80e to someone else. The 2wd is technically worth more anyway.
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Old 10-31-2013, 12:06 PM   #14
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Talking Re: What auto trans for a 8.1 vortec swap

Quote:
Originally Posted by 70ptta View Post
so im going to see if he'll sell the engine only and look for a 4wd 4l80e. thanks guys
I do have a 4x4 4L80E go go with my 8.1
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Old 10-30-2013, 11:29 PM   #15
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Re: What auto trans for a 8.1 vortec swap

I think they have a 4WD option......you could keep your turbo400 and put a Gear Vendors overdrive behind it.
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Old 10-31-2013, 12:29 PM   #16
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Re: What auto trans for a 8.1 vortec swap

Or you could get a divorced NP205, and a 2wd trans will work fine. Just another option.
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