08 Silverado Vmax 4L70E swap to a 6L90E
01-18-2009, 07:54 PM
#13
On The Tree
Thread Starter
Join Date: Jul 2006
Location: Alabama
Posts: 127
Likes: 0
Received 0 Likes
on
0 Posts
If the late 08's and 09's have a 4L80 its not going to help you. I'm assuming you meant 6L80e
To answer your ?'s
I'm running a modified stock cross member
Got the wiring harness from my local GM dealer
Tranny Temp does display
Speedo was on the money after a flash
Shift selector is limited to P R N D
I'm running a PI converter
If you get a new Trans from GM it will come with a Converter
The stock converter from your 4L70 won't work.
My set up has bugs, but only with the transfer case. No other codes
but my DIC flashes 4WD Errors...
To answer your ?'s
I'm running a modified stock cross member
Got the wiring harness from my local GM dealer
Tranny Temp does display
Speedo was on the money after a flash
Shift selector is limited to P R N D
I'm running a PI converter
If you get a new Trans from GM it will come with a Converter
The stock converter from your 4L70 won't work.
My set up has bugs, but only with the transfer case. No other codes
but my DIC flashes 4WD Errors...
One other question I have is what kept you from just getting the tranny harness from speartech and terminating it at the ECM? Or was there just too many issues wiring wise that a tranny only harness would not address?
01-19-2009, 05:52 PM
#14
TECH Resident
Join Date: Nov 2001
Location: Twin Cities
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
I've got one from Speartech it you want to buy it. I just decided to go with the proven system.
04-15-2009, 08:21 PM
#16
TECH Fanatic
Join Date: Jul 2005
Location: Beebe, Arkansas
Posts: 1,676
Likes: 0
Received 0 Likes
on
0 Posts
04-19-2009, 06:25 PM
#18
Launching!
Join Date: Apr 2007
Location: Dickinson,Tx
Posts: 225
Likes: 0
Received 0 Likes
on
0 Posts
Hmm. so would the AWD 6L80E mate up to my 08 4x4 1500 and transfer case? If so i may pull the trigger on one of the Escalade ones instead of building the pos 60e. Anyone know how much stronger these things are?
04-22-2009, 08:57 AM
#20
On The Tree
Join Date: Feb 2002
Location: Houston, Texas
Posts: 128
Likes: 0
Received 0 Likes
on
0 Posts
Are the crossmembers for the tranny different between the
4L65e and the 6L80e ? I am looking to install a 4L80e in my 2008 ECSB GMC with the 4L65e in it now. I was told I would have to mod the factory one to make the it work with the 4L80e ? Colud I maybe use one from a 6L70 /80/90 and not have to mod the factory cross member ?
4L65e and the 6L80e ? I am looking to install a 4L80e in my 2008 ECSB GMC with the 4L65e in it now. I was told I would have to mod the factory one to make the it work with the 4L80e ? Colud I maybe use one from a 6L70 /80/90 and not have to mod the factory cross member ?