4l80e or t56? - Page 3 - Chevelle Tech
2012 General Tech Forum from 2012

View Poll Results: 4L80e or T56?
4L80e 50 31.45%
T56 109 68.55%
Voters: 159. You may not vote on this poll

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post #31 of 64 (permalink) Old Dec 15th, 11, 11:17 AM
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Scott
 
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Re: 4l80e or t56?

Quote:
Originally Posted by 72sbc427 View Post
If you are considering various manual transmissions, you may want to look into which ones offer "blow proof" bellhousings also. I made that mistake when I went with the LT1 style T56 which you cannot get a blow proof housing for. The extra expense is worth not having shrapnel come through the floor board if you plan to run the car hard.
Actually there are several companies making SFI bellhousings for the LT1/T56 application now. McLeod and Quicktime are among them.

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post #32 of 64 (permalink) Old Dec 15th, 11, 11:20 AM
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Re: 4l80e or t56?

Quote:
Originally Posted by ryfrat View Post
T56 for cruiser and under 700hp over that I would get the 4l80e
If you go Tranzilla T56 you can go to 1,200 hp...I'd trust it more than a 4L80E at that power level.

http://rsgear.com/products/transmissions/tranzilla.aspx

Great stuff...!

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post #33 of 64 (permalink) Old Dec 15th, 11, 4:06 PM
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Re: 4l80e or t56?

"Actually there are several companies making SFI bellhousings for the LT1/T56 application now. McLeod and Quicktime are among them"

Thanks for the info. Will pass it along. They didn't have one last year when I checked. When I called they said they had tried and were not going to pursue it further.

Wheres that money tree hiding and who forgot to water it?

Last edited by 72sbc427; Dec 15th, 11 at 4:07 PM. Reason: messed up adding quote
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post #34 of 64 (permalink) Old Dec 16th, 11, 8:35 PM
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Re: 4l80e or t56?

Auto

1971 Chevelle. 355, megasquirt efi. On3 7875 turbo. 4l80e, py3600, 355 gears. C5 brakes, SC&C stg2+, hellwig bars, 04-06 gto seats. 546rwhp/450rwtq with 28% converter slip on 18psi!

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post #35 of 64 (permalink) Old Dec 17th, 11, 12:55 AM Thread Starter
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Re: 4l80e or t56?

now aaron we both know thats not going to happen!...lol

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post #36 of 64 (permalink) Old Dec 18th, 11, 3:45 AM
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Re: 4l80e or t56?

I have a 4L80e and 3.55 gears in the rear....
It's just a weekend cruiser with some small suspension mods and a nice 396 engine.... I love it!!!!

1970 Chevelle SS, 396, 4L80e, 12 bolt 3.55

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post #37 of 64 (permalink) Old Dec 20th, 11, 8:47 PM
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Re: 4l80e or t56?

I have the 4l80 behind a 502, 3.90 gears in my 66 and it rips ass.... I love both setups so good luck
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post #38 of 64 (permalink) Old Dec 21st, 11, 1:29 AM
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Re: 4l80e or t56?

I had a t56 and all the associated parts ready to go in my garage but sold it all after I decided that I'll be moving to Atlanta. Until I leave that traffic hellhole function will dictate form and so the auto will stay, otherwise a 6 speed would be the way to go.

L92 / 200-4r -> T56 71
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post #39 of 64 (permalink) Old Dec 31st, 11, 12:36 PM
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Re: 4l80e or t56?

Quote:
Originally Posted by geo's 66 View Post
I have the 4l80 behind a 502, 3.90 gears in my 66 and it rips ass.... I love both setups so good luck
Quantify "rips ass" so we can compare statistics..?

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post #40 of 64 (permalink) Old Dec 31st, 11, 1:15 PM
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Re: 4l80e or t56?

seems pretty simple-if you want a stick, go man., if you want an auto, go auto
i prefer an auto, build my own 80E's, put one in a 69 and a 65-with all the power its easier to program it to shift and hang on, lol

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post #41 of 64 (permalink) Old Jan 1st, 12, 9:07 PM Thread Starter
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Re: 4l80e or t56?

yeah i bought my t56 on friday so i am set..lol

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post #42 of 64 (permalink) Old Jan 19th, 12, 1:20 PM
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Re: 4l80e or t56?

Quote:
Originally Posted by ryfrat View Post
T56 for cruiser and under 700hp over that I would get the 4l80e
I agree with that. And the 80E can be further built to handle 1500+rwhp. I had a friend blow up a tranzilla at only 925rwhp.

Add a paddle shift setup and you get rid of the last inconvenience of an auto.

But have fun with your t56!

Jim
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post #43 of 64 (permalink) Old Jan 19th, 12, 4:34 PM
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Re: 4l80e or t56?

McCleod has the scattershield now got one on my 67 nice piece
100% bolt on.

They also make the LT1 pressure plate bolts think they sell them through Summit too, $50/set Gm discontinued them awhile back

If you have the LS1 setup ARP makes the bolt in fact may have a set here

Similar to an ARP 35lbs as per their spec. Different than the factory throw away bolts. Youll love it.


On the scattershield if you run a 7 qt pan you may need to grind a slight arc in the lower rim to get your drain plug out takes a minute.

If you have tuned equal length headers and the pan you may have to loosen the header up to get your oil filter out ran into that last week. 1/4 in grinding on that lip should take care of that. Worth the piece of mind, they come with a nice block protector plate,also.

Quote:
This post is a duplicate of a post that you have posted in the last five minutes.

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post #44 of 64 (permalink) Old Jan 19th, 12, 5:09 PM
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Re: 4l80e or t56?

Given the OP's stated wants i think he clearly made the correct choice. That does not however mean that T56 would be best for everyone. (and that is why i voted T56 back when he posted this)

I have a 4l80 in my swap and have been happy with it. If the cost had been the same I probably would have gone T56 but it would have taken ~2k more in addition to the added complexity of the swap.
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post #45 of 64 (permalink) Old Jan 23rd, 12, 10:55 PM
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Re: 4l80e or t56?

I voted T56 but I am putting an 80E in my '72. For me the bottom line is the wife says if we are gonna spend the cash on the car, she has to be able to drive it. She can drive a stick car but a 600 HP LSX engine with a T56 and 3.73 gears is a whole lot to handle so in goes the auto and she can even make a few passes on test-n-tune night, with a mild tune of course.
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