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Old 01-20-2012, 02:37 PM   #1
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Default 4L80e vs. 4L60e

I am planning a LSx engine swap into my Caprice and I have been told that a 4L60e is the way to go.. but I want to ask you guys...

Would the 4L60e be just as good as the 4L80e?

I am worried about modifying the trans hull for the 4L80e and I know the 4L60e will fit no problem because I already have a 1993 4l60 (700R4 non-electronic).

I am looking at a 5.3 or a 6.0 and shooting for 400hp & 500ft/lbs tq at the wheels.

The Caprice is a big vehicle and I want the trans. to be stout underneath it. Most everyone tells me that a built 4L60e will be fine... but would a stock 4L80e handle it better?

Sorry for all the questions.. but I read a lot of posts and they didn't really clear anything up for me!

Thanks to all who reply!

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Old 01-20-2012, 03:46 PM   #2
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IMHO (and I am no expert), a well-built 4l60E should be fine for your 400hp/500 ft/lbs needs assuming this is mostly a street car. On a car with street tires, the weak link is generally the tires - they will break free before the trans breaks internally. Another area where a 4L60e might have trouble is extended WOT in 3rd or 4th gear, but since this corresponds to WOT at 100+ mph it would only occur on a track (or the German autobahn).
However, if you think you are going to turbo/super charge your LSx, you should go with a well-built 4L80E.
IMO, if you are going to build the 4L60E yourself, or have a local shop build it with performance upgrades, start with a 2002 or later unit as GM upgraded them substantially that year to handle the new LS2 engine. A 4L65E is an even better option as it has the GM 5-gear planetaries and a few other hardened parts.
Better yet, call one of the site sponsors for their advice.
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Old 01-20-2012, 05:47 PM   #3
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4l80e is just better and since your going to do a swap it should be better to go with something that handles extra power and your assured that it would handle the power
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Old 01-20-2012, 06:16 PM   #4
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Put an 80 in it, set it up for it now and be done with it when the upgrades happen.
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Old 01-21-2012, 11:56 AM   #5
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Put an 80 in it, set it up for it now and be done with it when the upgrades happen.
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Old 01-21-2012, 09:54 PM   #6
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IDK why an 80 is so important when sponsors are building 60s with great success. Ill be going with a 60 from either rpm or flt when mine goes.
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Old 01-21-2012, 10:17 PM   #7
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Cause an 80 is worth it.
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Old 01-22-2012, 03:05 AM   #8
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An 80 is the way to go, hands down.
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Old 01-22-2012, 11:22 AM   #9
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I've been through 5 4l60e in my lifetime lol.
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Old 01-23-2012, 09:34 AM   #10
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Quote:
Originally Posted by Cool28 View Post
I've been through 5 4l60e in my lifetime lol.
Yeah... see this is what I am talking about... I see Impala SS guys blowing through the 4L60e's pretty consistently...

It would just seem to me that the 4L80e is more equipped to handle around 450rwhp without modification whereas the 4L60e needs to be built to handle it.

I can see the street vs. strip idea being valid as well. A built 4L60e would be fine if its only seeing light street driven duty... because the guys that I see breaking the 4L60e are usually at the strip a lot.
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Old 01-23-2012, 01:01 PM   #11
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Haha a stock 4L80E typically can rather easily hold 600 rwhp without a problem
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Old 01-23-2012, 02:31 PM   #12
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^^
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Old 01-23-2012, 04:14 PM   #13
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Quote:
Originally Posted by eLiT3SnIpEz View Post
Haha a stock 4L80E typically can rather easily hold 600 rwhp without a problem
Eventually 3rd goes out at that kind of hp on a truly stock 4L80E.
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Old 01-23-2012, 04:32 PM   #14
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Quote:
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Eventually 3rd goes out at that kind of hp on a truly stock 4L80E.
Yeah,
Pretty quick...
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Old 01-23-2012, 05:09 PM   #15
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Quote:
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Eventually 3rd goes out at that kind of hp on a truly stock 4L80E.
Quote:
Originally Posted by Jake's Performance View Post
Yeah,
Pretty quick...
True that, I guess my definition of "truly stock" 4L80E has been a little off lately since I've been paying attention to a few different builders out there with "stock-ish" rebuild kits that are substantially better than a "stock from the junkyard" 4L80E.
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Old 01-25-2012, 12:07 PM   #16
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Quote:
Originally Posted by eLiT3SnIpEz View Post
Haha a stock 4L80E typically can rather easily hold 600 rwhp without a problem
Yeah... you guys are totally right... I PROBABLY knew this before I wrote this thread...

You guys set your standards high.. I like that... the issue I am having is that the correct recipe for my Caprice sounds like a 6.0 and a 4L80E... and the problem is that I can hear my wallet cry every time I come to this forum.. LOL...

Thanks for the advice guys!

JB
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Old 01-25-2012, 06:30 PM   #17
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Quote:
Originally Posted by OldBBody View Post
Yeah... you guys are totally right... I PROBABLY knew this before I wrote this thread...

You guys set your standards high.. I like that... the issue I am having is that the correct recipe for my Caprice sounds like a 6.0 and a 4L80E... and the problem is that I can hear my wallet cry every time I come to this forum.. LOL...

Thanks for the advice guys!

JB
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Old 01-25-2012, 07:07 PM   #18
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And if you don't want your wallet to continue crying because you have to replace the weaker 4l60, put the 80 in there and be done with it.
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Old 01-25-2012, 07:41 PM   #19
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Couple hundred for a junkyard 4l80 or a couple grand to rebuild a 4l60 to have it stand up
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Old 01-25-2012, 08:52 PM   #20
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Jeez man.....don't even consider going with a 60E........even if you found a decent junk yard 4L80E for $500, toss in a shift kit.....it will outlast 5 4L60E's and be 10 times stronger and more reliable.

Built 4L60E's are $2,000+.....complete rip off.

My 4 4L60E rebuilds in 9+ years with my 427ci have lasted between 3-4 years....but they start to decline way before the rebuilds happen. Shifting issues, wierd stuff and just not all there and crisp. A decent junk yard 80E will perform strong and stay that way for a very long time.

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Old 01-25-2012, 08:52 PM
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