Automatic Transmission 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits
Sponsored by:
Sponsored by:

4l80 or th400.?

Thread Tools
 
Search this Thread
 
Old Dec 10, 2009 | 01:16 AM
  #1  
Outlaw E36's Avatar
Thread Starter
Teching In
15 Year Member
iTrader: (23)
 
Joined: Aug 2007
Posts: 39
Likes: 0
From: CA
Default 4l80 or th400.?

So ive been thinking of doin a m6 swap to a 4l80 or a th400 and i want to hear your guys opinion. Im currently building a 408 which is gonna be a streetable race car. Ive been thinking of goin with the th400 but ive read that its not a good idea to drive it on the streets so thats where the idea of a build 4l80 comes in play. The questions are

Is the 4l80 worth it cause of the OD.?
Is it as strong as a th400.?
Would i be able to down shift while driving.?
People with 4l80 whats your opinion and thoughts of it.?
Ive also read that i would have to change the pcm since
my car is a 98.

thanks

Last edited by Outlaw E36; Dec 10, 2009 at 10:42 AM.
Reply
Old Dec 10, 2009 | 06:29 AM
  #2  
cambirdracing's Avatar
TECH Resident
iTrader: (4)
 
Joined: Jun 2009
Posts: 865
Likes: 2
From: League City Texas
Default

the 4L80 is basically a th400 with o/d. GM put them behind diesel truck engines, so the should be tough enough.
Reply
Old Dec 10, 2009 | 06:55 AM
  #3  
forcd ind's Avatar
TECH Veteran
15 Year Member
Liked
Loved
Community Favorite
iTrader: (7)
 
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Default

Would i be able to dont shift while driving.?
did you mean downshift, or leave it in drive and let it shift?
400's have been around for over 40 years, dont understand about not driving them on the street, wether man shift or full auto-it comes down to wether you want o/d or not, and lockup converter-i now have a 4l80e, love it, and i have used 400's for over 40 years-they are more expensive, i use a compushift controller, but you could go full man to save money
if your not gonna drive that far on the street, then a 400 would be the way to go, but on a long trip, hi stall and low gears, flowmasters, well, you get the idea, lol (headphones)
Reply
Old Dec 10, 2009 | 09:26 AM
  #4  
slow67's Avatar
Gingervitis Addict
15 Year Member
iTrader: (2)
 
Joined: Nov 2004
Posts: 2,399
Likes: 3
From: DFW
Default

I can get a 98 computer to run a 4L80E electronically.
Reply




All times are GMT -5. The time now is 02:51 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE