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Who is the best at building the 6L80 tranny

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Old 12-03-2012, 02:14 PM
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Default Who is the best at building the 6L80 tranny
Just trying to get some info
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Old 12-03-2012, 09:41 PM
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Circle D Transmissions in Houston, TX. They really know how to make that box work extremely well.
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Old 12-04-2012, 12:17 PM
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I'd have to say circle D, they are not cheap by any means - but it will hold.
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Old 12-04-2012, 04:09 PM
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Originally Posted by Gordon0652
I'd have to say circle D, they are not cheap by any means - but it will hold.
Yeah, I looked up their prices for the 6l80e and was like

However, I have seen many of their products on high performing cars, so I guess the results speak for themselves
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Old 12-07-2012, 10:06 PM
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Circle D for sure. We have isntalled a few of their transmissions and high stall converters and I'm very impressed.
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Old 12-10-2012, 09:05 AM
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Are you planning on going with big power in the future?
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Old 12-10-2012, 10:28 AM
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We use RPM transmissions here.
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Old 12-10-2012, 09:53 PM
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How much can these 6l80e's be built to hold? I have read that 6l80es tend to start sliping and they become really tough to tune at high HP builds. Last I heard only shift kits were available for these 6l80es. I am curious to know because like I said they tend to get real tough to tune.
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Old 12-11-2012, 05:02 PM
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Originally Posted by Matt@Straightline
We use RPM transmissions here.
Last time I talked with them, this past week; they do not build the 6l80e.
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Old 12-14-2012, 06:03 PM
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Its not worth investing money on a 6l80e in my opinion. 4l80e is the better way to go.
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Old 12-15-2012, 02:30 PM
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How much power are you making? I'm right at 600rwhp, proper tune and a tranny cooler with 60000 miles and I'm still doing great.
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Old 12-15-2012, 08:52 PM
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Nice! Ive seen a couple of vehicles pushing that amount of RWHP and still holding, I heard they are tough to tune though.
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Old 12-15-2012, 11:02 PM
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Originally Posted by Thebeast916
How much power are you making? I'm right at 600rwhp, proper tune and a tranny cooler with 60000 miles and I'm still doing great.
That is a lot of power through the stock 6l80e. Who tuned it?
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Old 12-18-2012, 07:25 PM
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x2!!^^ Impressive numbers on a 6l80e
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Old 12-21-2012, 01:35 PM
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Originally Posted by Gordon0652
That is a lot of power through the stock 6l80e. Who tuned it?
Rick Crawford tunes my car
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Old 12-22-2012, 08:31 PM
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He does a great job! The highest RWHP that my tuner, Eber Saenz, has tuned a 6l80e has been at 510-530 I believe, ill have to double check.
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Old 12-22-2012, 08:32 PM
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^That is on a full interior NNBS Silverado.
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Old 12-23-2012, 12:53 AM
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With a transmission cooler, proper fluid changes, and a proper tune, these trannys will last. I've got about 80-100 1/4 mile passes on mine as well.

I need to dyno mine to confirm, but I should be right at 600rwhp
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Old 12-23-2012, 02:42 PM
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I see, good numbers!
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Old 12-25-2012, 06:37 AM
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540 rwhp, untouched 6l80, Livernois tuned it two years ago, no issues.
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