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Old 03-13-2008, 06:33 PM   #1
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Rebuild or Drop in?

Do you guys think it'll be cheaper to rebuild a 4L60E to hold some big power or just buy another built trans (brand new) and drop it in?...
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Old 03-13-2008, 08:40 PM   #2
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Cheaper now, or cheaper when you have to pull it out again and ship it back after it blows up?
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Old 03-14-2008, 11:06 AM   #3
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4L60's are tough from what I've been told. There are certain critical high stress parts that they don't make a stronger aftermarket version of so either way it's tough to build them up to handle lots of power. I have no personal experience pulling one apart but that's what I was told my 2 different trans builders when I blew the 4L60 in my pickup. That being said you may want to just look into a stock GM replacement with a warranty or have yours rebuild with upgraded clutches and so forth but know that there are still weak points that can't be addressed at this time.
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Old 03-24-2008, 02:46 PM   #4
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Ok, well does anyone know of the easiest replacement trans I can bolt up to an LS1 and that can handle a ton of power? I know some tranny's are a PITA to install...
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Old 03-24-2008, 04:31 PM   #5
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Quote:
Originally Posted by HardcoreZ28 View Post
4L60's are tough from what I've been told. There are certain critical high stress parts that they don't make a stronger aftermarket version of so either way it's tough to build them up to handle lots of power. I have no personal experience pulling one apart but that's what I was told my 2 different trans builders when I blew the 4L60 in my pickup. That being said you may want to just look into a stock GM replacement with a warranty or have yours rebuild with upgraded clutches and so forth but know that there are still weak points that can't be addressed at this time.
actually, these trans need a lot to get them to hold up compared to what other trans take. Look up on ls1tech, lots of people do a 4L80E conversion.
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Old 03-25-2008, 03:19 PM   #6
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4L80E = 4L60E w/ different internals?
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Old 03-25-2008, 04:45 PM   #7
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4L80E = 4L60E w/ different internals?
No.

4L65-E is a version of the 4L60-E with better internals.

4L60-E is an electronic derivative of the old TH350.
4L80-E is an electronic derivative of the old TH400. Stronger but heavier.

First gear in a 4L60-E is 3.06. First gear in a 4L80-E is 2.48.
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Old 03-25-2008, 07:49 PM   #8
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4L60E is just an electronic version of the 700R4 they both share most of the same internal parts..
Plan on spending around $2000 for a 4L60E rebuild that is what mine cost but it came with a gaurantee for aslong as I own the car..
I weighed the pro's and con's of doing the 4l80e swap but you will have to get a new Torque converter along with a few other things..
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Old 03-29-2008, 11:47 AM   #9
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$2000.00 for a rebuild? How many horses is rated for? And where did you get it done at?
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