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Speartech LS2/6L80E swap

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Old 01-09-2008, 06:13 PM
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The trans I got is a 2WD... lucky me...

More info soon...
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Old 02-09-2008, 06:52 PM
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Where are you at on your 6L90 conversion. I am building a new LS2 stroker motor for my Denali PU and want to go the same route. I am currently searching for a used tranny although I maybe able to get a new one at wholesale. Please give us an update or send me a PM. Thanks
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Old 06-13-2008, 04:01 PM
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Was there a notable fuel mileage increase? i know that was not the point of the swap. Thought I might ask, though.
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Old 06-23-2008, 06:56 PM
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Originally Posted by DrkPhx
Would love to see a 6L80E swap into a TB SS with an E40 PCM/TCM.
Count me in for that one!

Also wouldn't mind trying one in my Formula
Last edited by WILWAXU; 06-23-2008 at 07:03 PM.
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Old 05-19-2009, 03:52 PM
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I am sure it was answered before. Any posseblility to connect a 6l80 or 90 with an Gen IV BBC?

I would love to run a 6-speed with my 540cui in my 68 Impala.
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Old 05-22-2009, 06:49 AM
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No answer???
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Old 05-22-2009, 07:46 AM
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Originally Posted by hannes_slanec
I am sure it was answered before. Any posseblility to connect a 6l80 or 90 with an Gen IV BBC?

I would love to run a 6-speed with my 540cui in my 68 Impala.
Mast Motorsports has the stuff you need.
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Old 05-23-2009, 03:59 AM
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Originally Posted by hannes_slanec
I am sure it was answered before. Any posseblility to connect a 6l80 or 90 with an Gen IV BBC?

I would love to run a 6-speed with my 540cui in my 68 Impala.
TCI has a new 6 speed that will do that.
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Old 05-25-2009, 11:30 AM
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Originally Posted by rsz288
TCI has a new 6 speed that will do that.
Thanks,

but will the 6L80 fit on the old BBC or not. The TCI is for sure one nice thing but I read that it will cost up to 6000$ all together. Quite much for a tranny.

LG Hannes
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Old 05-25-2009, 04:31 PM
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Originally Posted by hannes_slanec
Thanks,

but will the 6L80 fit on the old BBC or not. The TCI is for sure one nice thing but I read that it will cost up to 6000$ all together. Quite much for a tranny.

LG Hannes
AFAIK it bolts up, though one bolt is missing.
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Old 05-25-2009, 09:43 PM
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Originally Posted by rsz288
AFAIK it bolts up, though one bolt is missing.
Thanks for the Info so far.

I am not an native speaker so I just can guess AFAIK means:

as far as I know - right?

If it bolts right on, why people suggests the TCI unit here in the board?



Thanks again

Hannes
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Old 05-25-2009, 10:19 PM
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Originally Posted by hannes_slanec
Thanks for the Info so far.

I am not an native speaker so I just can guess AFAIK means:

as far as I know - right?

If it bolts right on, why people suggests the TCI unit here in the board?



Thanks again

Hannes
Apologies for the 5 letter acronym. Yes AFAIK means what you surmised.

The TCI trans will bolt in and run on almost any GM V8. It has a stand alone controller.

The 6L80 has an integrated controller (in the trans) that needs to run "alongside" a compatible engine controller. They talk on the CAN.

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Old 06-05-2009, 06:28 PM
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Originally Posted by Speartech
I wish that was true!

Sounds like GM parts direct pricing. Don't forget the Vaseline when they bend you over on shipping.

Also these transmissions have a core charge; they end up being around $3000.
John, How does one tell the difference between the 6L80 and 6L90?

Brian
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Old 06-05-2009, 09:14 PM
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Originally Posted by 55ChevDelray
John, How does one tell the difference between the 6L80 and 6L90?

Brian
The 6l90 will be longer and have a huge output shaft with a 34 spline count ! The 6l80 is 32 spline same as the 4l80.

6l90 left 6l80 rt
Last edited by Bo185; 06-05-2009 at 09:23 PM.
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Old 06-08-2009, 09:49 PM
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Originally Posted by 55ChevDelray
John, How does one tell the difference between the 6L80 and 6L90?

Brian
If you have one in front of you and wondering which it is, you can measure from the dipstick tube to the tail housing flange and see the difference. The 6L90 is about 1.25 inches longer.

6L80:





6L90:

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Old 06-09-2009, 12:12 PM
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Originally Posted by Speartech
If you have one in front of you and wondering which it is, you can measure from the dipstick tube to the tail housing flange and see the difference. The 6L90 is about 1.25 inches longer.

6L80:





6L90:

John:
Thanks! I ordered this tranny (6L90) from a salvage yard. It was advertised as a 6L90, but having not studied the (physical appearance) differences between the 6L80 and 6L90 I wasn't sure I really got a 6L90. Definitely have the 6L90.

Bo:
Yeah the yoke is a MONSTER! Gonna have to have a driveshaft made since the truck driveshaft is way too big in diameter.

Thanks guys. I'm embarking on a LS3 and 6L90 adventure...
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