Author Topic: ???4L80E trans into 72 Fj40???  (Read 2501 times)

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CapitaCrawler

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???4L80E trans into 72 Fj40???
« on: May 29, 2015, 12:54:10 PM »
Currently the FJ has a 305, turbo 400, stock case I believe, dana 60 front, dana 80 rear with 5.29s and arbs. Looking to put in a 4L80E. What are the common problems with this?
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Willard

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Re: ???4L80E trans into 72 Fj40???
« Reply #1 on: May 30, 2015, 06:20:48 PM »
What's the reason for the 4L80? TH400 is strong trans.
90'4runner......lots of goodies.

CapitaCrawler [OP]

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Re: ???4L80E trans into 72 Fj40???
« Reply #2 on: May 30, 2015, 07:13:58 PM »
Turing 2500 rpms on a v8 going 50 is not a good way to keep an eng reliable.
"Buy the ticket, take the ride" -Dr. HST

CapitaCrawler [OP]

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Re: ???4L80E trans into 72 Fj40???
« Reply #3 on: May 30, 2015, 07:14:31 PM »
Plus I got my hands on one
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Willard

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Re: ???4L80E trans into 72 Fj40???
« Reply #4 on: May 30, 2015, 07:46:29 PM »
so you want to know the problems with the 4L80's or just the install?
90'4runner......lots of goodies.

CapitaCrawler [OP]

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Re: ???4L80E trans into 72 Fj40???
« Reply #5 on: May 31, 2015, 12:16:49 AM »
The 80 is a strong trans. Won't have to worry about it. Reliable and any SBC in front of it will not break it. Will be building it for longevity with a stand alone and reverse manual valve body. Pretty simple work. Question is, what are issues with it regarding install and tcases to use or steer clear of. Right now I believe I have the stock tcase but I am unsure until I can get into it.
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Willard

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Re: ???4L80E trans into 72 Fj40???
« Reply #6 on: May 31, 2015, 06:26:15 PM »
There strong that's for sure...........I've seen a few grenade behind a SBC. Was due to lack of cooling and overloaded towing. There weak spots are the input housings and roller clutch. Planetary sets are strong in those. I rebuilt quite a few of those I was a heavy line tech for GM. But behind a 305 I don't see any problems. My buddy had a 4L60E I built for him behind his 1st gen vortec.....mated with an Orion t case. He had clearance issues with the oil pan and front driveshaft. I think there is a company who builds an extended adapter for that issue. He had to run a Nissan style mini drive-shaft flange, but it wasn't very strong. He now has the adapter and will be installing it. I will try and find out who makes it.
90'4runner......lots of goodies.

 
 
 
 
 

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