TheBuiltCmax
Region: US
Monday 31 August 2026 23:23:03 GMT
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why? :
I'm just asking out of curiosity, but who going to be the first to try a 8hp90 behind a duramax?
2026-09-01 00:33:23
12
upnorth_yj :
soo im not a big chevy guy is the duramax bell house pattern the same as a ls motor? if it is check out a 8hp70 or above built up
2026-09-01 16:20:25
5
Benson :
If you’ve got money a liberty h pattern😂 they use them in blown hemis
2026-09-01 00:04:38
49
Niall :
utterly insane option but the 8ap from zf might be an interesting option. mind you I don't know anything about price or command options, I just think it would be neat
2026-09-01 17:24:13
7
user4119421322697 :
M&m turbo 400s for the most part at around 25k or more to hold that much power and that’s before converters
2026-08-31 23:44:52
8
Zachery Decker :
Buy you a red case turbo 400 or a Rossler two speed turbo 400 aftermarket case get you about a it can run you anywhere between 5000 and $10,000 but it will hold most of the Duramax part you’re gonna throw out probably break a crank before you will break the transmission lol
2026-09-01 02:00:36
5
nobrakesnation :
You need to watch Wyatt’s (Whitt_built) duramax build. He’s running over 2000hp…3k+ ft lbs on a built 4l80e. Also I’ve got a 12 valve in front of a built 4l80e and it’s working good so far
2026-09-01 20:26:04
6
Ogre.Archery :
build a race powerglide. I've seen those take 1000 HP built correctly
2026-09-01 12:18:16
1
Ethan Kupsch :
The reason you loose less power in a 4l80 is cause the internals weigh half the weight you can’t have giant shafts and planetary and only loose 15%. Think of a 48re its a weak light trans but with billet parts it stays light and can hold the power.
2026-09-01 03:33:32
7
caidenmitchell310 :
Honestly I’m not sure why you would do anything other than a 48 or a 400. They have both proven that you can hold 3k+ ft/lbs of TQ.
2026-09-01 13:41:14
6
David Ellenberger :
everything is larger and heavier in the allison huh? its a wonder they rob so much more hp over a 4l80. 🤷♂️
2026-09-28 09:15:39
1
Nick :
Pretty much 48re if your in a full size. If you go to a pro mod like setup in a car/little truck where weight is way down th400
2026-09-01 19:51:28
2
Ocean.blue.6.0 :
Someone can 1000% build you a th400 that you do not have to worry about 1 bit just tell them what it’s for and what it needs to do
2026-09-01 22:43:36
3
Connor Kurtz :
4l80s big benefit is each gear stacks , so every gear change there is no neutral in between to shock load the internals
2026-09-11 12:57:17
1
Brody mcgray 🫤 :
Is is possible to 48re swap a durmax with a full manual valve body and if so how much you think it would cost for parts to swap it and shi I’m building my lly and want to build a trans before putting more power too it and I want to do something kinda unique I’ve asked some people and nobody can give me a straight answer
2026-09-01 17:52:32
2
dominicscott0222 :
47 re
2026-09-01 20:57:52
1
AK'S BUILDS :
lenco or bust
2026-09-01 03:11:41
8
Alex hall :
80 and 400 run the same parts for the most part
2026-09-02 20:52:20
3
F80Harley :
it took me a fat second to realize this is diesel and 1200hp 2500 ft lbs threw me for a loop
2026-09-02 05:10:45
3
Dakota :
Simple just make even more power 😂😂😂
2026-09-01 09:21:46
2
Bton :
What if you ran the Allison but CNC'd lighter parts for it? Seems like building down an Allison is easier than building up a 4L80? 🤷
2026-09-03 02:39:17
2
863_PipeLineTrash :
M&M th400
2026-09-01 19:01:14
2
Gerardo Lopez :
what about the 4l85?
2026-09-01 10:15:47
1
Don’t touch that :
Their more than capable of holding 1500 ft lbs of tq if you throw enough money at it. And your gonna throw a lot of money at it if you want it to handle that much torque
2026-09-02 22:14:14
1
Chris :
I had my 6.0 in a 04 Chevy shred through 4l80 I put 6 transmission in
2026-09-01 11:14:43
2
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