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Old 03-21-2013, 12:02 PM   #1
99_Sierra
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Will my 4l60e fit my 6.0

I have a 99 gmc Sierra 5.3 it has a 4l60e. I am building a lq4 out of a 2001 Denali. Will my 4l60e bolt right up to my 6.0?

Thanks
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Old 03-21-2013, 05:12 PM   #2
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Re: Will my 4l60e fit my 6.0

It will bolt up but it won't last very long.
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Old 03-21-2013, 05:30 PM   #3
99_Sierra
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Re: Will my 4l60e fit my 6.0

Why do u say that?? Reason I ask is his truck has a 4l60e and it has like 200k miles so his has lasted.
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Old 03-21-2013, 07:47 PM   #4
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Re: Will my 4l60e fit my 6.0

Didn't the 6.0L come backed with the 4L80E.

If that's the case think of it like a 327 or 350 being backed by a TH350 and a 454 backed by a TH400.... or 4.8 and 4.5 with 4L60 and 6.0L with 4L80.

Some good info here:

http://www.gm-trucks.com/forums/topi...t-the-lq4-60l/
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Old 03-22-2013, 01:08 AM   #5
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Re: Will my 4l60e fit my 6.0

I would definitely put a 80e behind it. I wouldn't even mess with building the 60e to hold up to a 6.0.
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Old 03-22-2013, 06:59 AM   #6
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Re: Will my 4l60e fit my 6.0

It will bolt right up I like to use my old flywheel when I do swaps and just make sure if your using one of the older 6.0s if it has the spacer between the crank and flywheel take it out. As far as the built 60 i've gone thru 3 and mine has all the goofies on it pi multi disc converter,trans cooler w/fan right now its getting rebuilt case it was starting to go out again so I recommend if.you can swap to a good 80e its worth it if you plan on beating on it, my 6.0 has cam/heads, fbo,nnbs intake and pretty much a whole bunch of goodies.
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Old 03-22-2013, 07:06 PM   #7
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Re: Will my 4l60e fit my 6.0

All 6.0L LQ9 & LQ4 that were installed in 1/2 ton chassis had either a 4L60E or 4L65E. A well built 4L60E can EASILY handle a cam/heads 6.0L...Where a stock 4L80E will handle it.
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Old 03-22-2013, 09:53 PM   #8
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Re: Will my 4l60e fit my 6.0

Quote:
Originally Posted by clinebarger View Post
All 6.0L LQ9 & LQ4 that were installed in 1/2 ton chassis had either a 4L60E or 4L65E. A well built 4L60E can EASILY handle a cam/heads 6.0L...Where a stock 4L80E will handle it.
would a 4l80 out of a 98 chevy 2500 model work
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Old 03-23-2013, 07:07 PM   #9
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Re: Will my 4l60e fit my 6.0

Quote:
Originally Posted by clinebarger View Post
All 6.0L LQ9 & LQ4 that were installed in 1/2 ton chassis had either a 4L60E or 4L65E. A well built 4L60E can EASILY handle a cam/heads 6.0L...Where a stock 4L80E will handle it.
Wasn't there a good bit of torque management programmed into these trucks though? Even with the 4l80e there was torque management programming. Not saying it wouldn't work but there might have been a programming difference to help make the 60/65 last longer behind the 6.0.
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Old 03-23-2013, 07:54 PM   #10
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Re: Will my 4l60e fit my 6.0

I'm sure there was too. Even the 5.3 is held back quite a bit.
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Old 03-23-2013, 09:28 PM   #11
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Re: Will my 4l60e fit my 6.0

Quote:
Originally Posted by hotrodchevy1999 View Post
would a 4l80 out of a 98 chevy 2500 model work
Yes, It will work. Non LS 4L80E's don't have the top center bellhousing bolt.

Quote:
Originally Posted by bighaas79 View Post
Wasn't there a good bit of torque management programmed into these trucks though? Even with the 4l80e there was torque management programming. Not saying it wouldn't work but there might have been a programming difference to help make the 60/65 last longer behind the 6.0.
Different programming for sure, A LQ9/4L65E from a Cadillac Escalade will have different tuning than a LQ9/4L65E from a Silverado SS, Any 60/65/70 will need to be BUILT to handle a modified engine & or tuning.
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Old 06-12-2018, 06:21 PM   #12
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Re: Will my 4l60e fit my 6.0

Reviving an old thread here questioning my thoughts of running a 6.0L/4L60e combo in my 70 C10. I have the tranny in my garage with plans to do a 5.3 LS swap, then found a better deal on an LQ4. Lot's of opinions saying a 4L60e would hold up fine, and even more saying not a chance.

Seems to me that if GM didn't put the 4L60e behind the 6.0L neither should I, or am I just not adventurous enough?
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Old 06-12-2018, 06:47 PM   #13
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Re: Will my 4l60e fit my 6.0

GM DID put the 4l65e behind the 6.0 ...and this is basically the same tranny
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Old 06-12-2018, 06:49 PM   #14
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Re: Will my 4l60e fit my 6.0

See earlier comment from Clinebarger. He knows his stuff
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Old 06-12-2018, 06:55 PM   #15
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Re: Will my 4l60e fit my 6.0

We all know the drivers right foot can tear up most anything. The life of tranny will hinge largely on how it is driven and how well serviced\maintained.
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Old 06-13-2018, 12:44 AM   #16
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Re: Will my 4l60e fit my 6.0

So if it boils down to building a performance 4L60e vs finding a stock 4L80e, i’d probably go with the latter .
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