Allison 6sp: Swap Allison for???

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
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If all goes well I might be ditching the Alli and going with a 4L80E w/ a manual valve body. Any advice on this swap Mike?

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So you want to put a 4L80 in your truck over the alli?

Sent from my freakin phone Mike L!
 

Mike L.

Got Sheep?
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Aug 12, 2006
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4L80E will not hold the tq in 4th gear behind the alli in a full size truck.

Sent from my freeken Dell laptop which doesn't have any kind of freeken tapa freeken talk.
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
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Phoenix Az
4L80E will not hold the tq in 4th gear behind the alli in a full size truck.

Sent from my freeken Dell laptop which doesn't have any kind of freeken tapa freeken talk.

X2 you will screw that trans up faster than a stock trans on a big tune

Sent from my freakin phone Mike L!
 

D-MAX Mafia

Hood down, smoke up!
Nov 4, 2009
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Oh you guys giving me shit about my sig that I cant f-ing change?!

Sent from you all suck balls using Tapatalk! Lol!
 

D-MAX Mafia

Hood down, smoke up!
Nov 4, 2009
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Ok Mikey Mike so whats the big secret? What will hold the power and replace the Allison. A little birdie thinks that its a PG. Huh huh?
 

LBZ

Super Moderator
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Jul 2, 2007
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X2, the only times I had sloppy shifts was when I would try different tunes out. The ECM tunes I run have matching TCM tunes to work together.

Sure wish I could figure out how to do this.......:( I do know when it is done correctly, it makes a world of difference!!
Personally I don't think there is anything wrong with the trans until you start messin about in the 750hp + range. Up to that point there are plenty of parts and upgrades you can do to help it be somewhat reliable.
 
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duramaxdiesel

Dmax Nut
Oct 23, 2008
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Sure wish I could figure out how to do this.......:( I do know when it is done correctly, it makes a world of difference!!
Personally I don't think there is anything wrong with the trans until you start messin about in the 750hp + range. Up to that point there are plenty of parts and upgrades you can do to help it be somewhat reliable.

I'm with ya on that. After my truck is tuned will my TCM need to be tuned to accept all that new found power? I would think so.

Nick
 

MaxPF

JAFAWAM
Jan 12, 2011
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Mesa, AZ
If all goes well I might be ditching the Alli and going with a 4L80E w/ a manual valve body. Any advice on this swap Mike?

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How much torque does your DMax make? Anything over 1000lb-ft and I see this ending badly :popcorn:

Maybe Mike is trying to figure out how to make an Ultrashift HV work behind a DMax. As much as people bitch about defueling with the Allison, they would HATE the mandatory defueling involved to shift one of those :D
 

D-MAX Mafia

Hood down, smoke up!
Nov 4, 2009
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Phoenix
Yeah my buddy Jake talked me out of the 4L80. Looks like I might be stuck with the alli. I really cant bitch, it has held up for 130,000 miles in stock form with a Transgo Jr. Need to get it built and tuned so I can bump up the hp a little.
 

Mike L.

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Aug 12, 2006
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With my billet planet and C2 hub, along with input output shafts and proper tuning; the Alli stands a greater chance of living under extreme power.
 

MaxPF

JAFAWAM
Jan 12, 2011
182
0
16
Mesa, AZ
Yeah my buddy Jake talked me out of the 4L80. Looks like I might be stuck with the alli. I really cant bitch, it has held up for 130,000 miles in stock form with a Transgo Jr. Need to get it built and tuned so I can bump up the hp a little.

I can think of a lot worse transmissions to be "stuck" with. ;) I know the aftermarket has managed to do amazing things with the dodge trannys, but talk about making a silk purse from a sows ear :p
 

MaxPF

JAFAWAM
Jan 12, 2011
182
0
16
Mesa, AZ
With my billet planet and C2 hub, along with input output shafts and proper tuning; the Alli stands a greater chance of living under extreme power.

Any reason why a guy can't simply hack his firewall and trans tunnel and swap in a 3000 or 4000 with the WTEC controller? :D
 

Bryce418

Still slow
Oct 5, 2009
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Any reason why a guy can't simply hack his firewall and trans tunnel and swap in a 3000 or 4000 with the WTEC controller? :D

Ooooooooooo............ That would be awesome an even bigger slower shifting trans!
 

THEFERMANATOR

LEGALLY INSANE
Feb 16, 2009
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Any reason why a guy can't simply hack his firewall and trans tunnel and swap in a 3000 or 4000 with the WTEC controller? :D

Them thangs are HUGE, and shift so dam slow. I know my grandfathers motorhome has a 3560 in it, and that thing even at WOT takes about a second and a half to change a gear.