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Old 09-27-2011, 06:27 PM   #1
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Default Can you ID a 6L80E/6L90E?

I picked up a 6L90E? used. Seller said he was parting out a wrecked 09 Silverado 1500 crew cab. The trans has a build sticker on it, anyone know how to decode it? I didn't get to see the truck, so I just want to verify what I have. I know its a 6LX0E, just want to confirm year and model
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Old 09-28-2011, 08:34 AM   #2
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My 60E has the vin # laser etched on the lip of the bell housing, dr side.
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Old 09-28-2011, 09:21 AM   #3
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Thanks, I will give it a look
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Old 09-28-2011, 01:09 PM   #4
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Most, if not all of the 1/2 tons got a 6L80. What is the last 8 of the vin or does it have a 9CJA on the tag?
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Old 09-28-2011, 01:17 PM   #5
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Haven't been home to check for the VIN stamp yet. Sticker says 8CAA
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Old 09-28-2011, 07:14 PM   #6
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Quote:
Originally Posted by Old Geezer View Post
My 60E has the vin # laser etched on the lip of the bell housing, dr side.
Mine has what looks like the last 9 digits of the VIN etched on top of the bellhousing. Not sure that does me any good without the first 8?
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Old 09-28-2011, 09:00 PM   #7
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I believe the 6L90 has 34 spline instead of the 32 in the 6L80

AWD/4WD Transmission-bellhousing to end of output shaft (bellhousing to end of case)
4L70: 26.875" (22.25")
6L80: 27.125" [+.250"] (23.3")
6L90: 28.625" [+1.750"] (24.7")
4L80: 29" [2.125"] (26")
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Old 09-28-2011, 09:01 PM   #8
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You referring to the input or output?
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Old 09-29-2011, 04:07 AM   #9
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Look for MYC (6L80) or MYD (6L90)
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Old 09-29-2011, 09:35 AM   #10
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Quote:
Originally Posted by TrueBlueGTO View Post
Look for MYC (6L80) or MYD (6L90)
Look where?

Pics attached
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Can you ID a 6L80E/6L90E?-img00111-20110929-0633.jpg   Can you ID a 6L80E/6L90E?-img00109-20110929-0632.jpg  
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Old 09-29-2011, 09:58 AM   #11
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8CAA is an 08 MY 6L80e 2wd Since this is my second post here, I don't know how performabuilt trans or the other trans shop poster feels about posting a link to another trans site, but PATC has some pricey 6L80 and 90 parts for strengthening the trans. There is also a custom built 6 speed auto I just heard of that I can research if you want. Real pricey and doesn't have the 4.027 first, though. The MYC or MYD is usually only found on the option sticker, and that is on the original truck.

If you can get the last eight of the vin, I can tell you a little more info on the truck if it helps, but all you need is really right there. The VIN can be pulled up by any GM dealer since that is the only vehicle with that number, with only one other possibility, as you may also need the first three for positive ID.

8= model year
CA= model code
A= Automatic or Manual

Last edited by Brian68; 09-29-2011 at 10:06 AM.. Reason: Added information.
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Old 09-29-2011, 10:01 AM   #12
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Where did you find the info on 8CAA?

If its an 08 2wd, it would have to be from an Escalade or Denali, correct?
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Old 09-29-2011, 10:32 AM   #13
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I work at a dealer, for the moment. That is just experience with the model code, if I got a code I didn't know I would be looking for awhile....

The trans is really generic as they sit on the shelf at the factory and other than 80's or 90's, there is no way to tell or for that matter even care about where it came from, as they are all the same. the software is where the difference is made when programming for each application. The TCM will need to be programmed somehow with a VIN so it doesn't default the shifts and be a nasty child in operation.

This is mostly why I joined this forum, 'cause I want to build and install a LS1 in my 93 truck, and would really like to get a 80 or 90 behind it. I don't have a whole lot of performance experience in me so....
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Old 09-29-2011, 10:37 AM   #14
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And to add more, I have only seen two or three 2wd trucks with a 6 speed. They are all AWD (or 4WD) in Colorado, Escalades and Denalis included.
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Old 09-29-2011, 03:12 PM   #15
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Quote:
Originally Posted by Brian68 View Post
And to add more, I have only seen two or three 2wd trucks with a 6 speed. They are all AWD (or 4WD) in Colorado, Escalades and Denalis included.
Its clearly a 2wd trans.

What does the CA model code indicate?

I'll post what I assume is the VIN tonight: etched on bellhousing T81149578
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Old 09-29-2011, 11:57 PM   #16
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Here is the full VIN, 2GTEC638881149578, It is what you said only an 08, with the Denali package, and had an L92 eng and 3.42 rear.

I can do some research as to the model code breakdown when I get off of vacation next week. I know the CA is an 80 2wd and an 8CKA or 8CJA would be a 4wd, just don't know why yet.

HTH
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Old 09-30-2011, 07:29 AM   #17
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Thanks for all the info. Does your service computer tell you the last date and mileage for that truck? A little nervous now since he told me it was from an 09 Silverado...
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Old 09-30-2011, 11:42 AM   #18
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April 19/10 it had 65,950 miles, at Keating Chev in Crosby TX. It had a rear extension 0-ring seal put on at 51,304 10/19/09 in Modesto CA.

I wouldn't worry much about the trans, the most common problems on those are leaking 3-5-R seals on the back of the pump cover and bad welds (leaking) at the 3-5-R housing. That has a symptom of delayed reverse or wierd 3 or 5 shifts, usually just cold. They also use viton check ***** that wear quickly on one or more positions, but I have not seen much else common, and not a ton of those 3 either. The pump cover now has a second design for 09 and up units that is a service fix for 07-08 models that uses better seal design.

There is a 6L80 conversion thread right now I am learning a boatload from, this might calm the nervousness for you?
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Old 09-30-2011, 01:14 PM   #19
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Link to thread?
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Old 09-30-2011, 02:09 PM   #20
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This one 6L80E Swap

Or I can save you time and just go here http://www.pacificp.com/forum/viewto...216c3ea8add063
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Old 09-30-2011, 02:09 PM
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2011, 2ss, 2wd, 6l80e, 6l90e, awd, breakdown, camaro, chevelle, code, decode, gm, myd, s10, swap, transmission, vin


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