View Poll Results: TH350 Swap or 4L80E Swap
TH350 Swap
29
30.53%
4L80E Swap
66
69.47%
Voters: 95. You may not vote on this poll
TH350 or 4L80E swap
I went with a Hughes-built 4L80E and the TCI T-Com controller and I would never go back to a non-programmable tranny. If you never plan on going higher than 500rwhp I would check out the built 60E's, otherwise go straight to the 80E's and don't look back. Unless someone else is paying for your gas and your never want to roll race to speed in your life.
Jim
Jim
FormerVendor
Joined: Oct 2006
Posts: 3,123
Likes: 3
From: D-F/W
Hey guys... for those of you exploring costs and which unit to swap into please do not hesitate to give me a call or p.m. me.
Between my builder John and myself we have over 55 years in the industry and can help you with any unit you should choose.
All you gotta do is ask!
g
Between my builder John and myself we have over 55 years in the industry and can help you with any unit you should choose.
All you gotta do is ask!
g
10 Second Club
Joined: Oct 2007
Posts: 2,630
Likes: 28
FWIW, 4L80's can be found in just about any salvage yard, for those thinking that they are super expensive. I helped my buddy pull one out of a short bus last weekend. Body on the bus was shot, but it was driven in. Pulled it out in under an hour, cost, 70 bucks, LOL. There are more in there too.
4l80 for the win, reliable as **** with allot of power even with minimal upgrades as I ahve talked to a few on here with insanely awesome results! Cheap too when you find a core yourself and rebuild it, this is what I will be doing.
Damnit, can someone give me some physical size dimensions of the 80 compared to the 4L60E?
I think I can get one pretty cheap but I just put a brand new floor in my '56 Belair and need to know how much trans tunnel mods I would need to fit that big 80 in there.
Dan
I think I can get one pretty cheap but I just put a brand new floor in my '56 Belair and need to know how much trans tunnel mods I would need to fit that big 80 in there.
Dan
i have herd there is a few versions of the 4l80e out there. i was talking to a buddy at the gm garage he said there is two different versions of the 80e some have two speed sensors and some have one? any one herd of this. i will be using a 99 ls1 with efi live and i would like to use it to run the trans. the question is how can i get it to all work together? any body have some info or recommendations for me on what year trans to look for?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
i have herd there is a few versions of the 4l80e out there. i was talking to a buddy at the gm garage he said there is two different versions of the 80e some have two speed sensors and some have one? any one herd of this. i will be using a 99 ls1 with efi live and i would like to use it to run the trans. the question is how can i get it to all work together? any body have some info or recommendations for me on what year trans to look for?
4wd units have only 1 speed sensor up front. the rear sensor plug is a dummy plug, the real speed sensor is in the transfer case. A 2wd 4l80e is what you want. Any unit 94 up is compatible with LSx engines and electronics. 98 down 4l80e's dont have the top bellhousing bolt hole. The Hydramatic division made revisions to the 4l80e in both 99 and 01 so for best strength it's best to get an 01 up. The 4l85e came behind the big block in the avalanche and behind duramaxes in the vans and has 5 pinion planetaries versus 4 in the 80e....but I wouldn't worry about that, the stock 80e with a shift kit has been known to handle big power.
thanks for the info!
Registered User
Joined: Feb 2021
Posts: 2
Likes: 0
How so cheap?!? Where?!? Well if you are driving the car alot get a 4L80 and if you just race it go for a TH350 or TH400. The 4L80 will rob alot of power and is added unwanted weight. I just did a M6 to a TH350 and am putting down maybe 750 to the wheels. A TH350 can handle it with no problems as long as it is built right. I paid just under 1500 dollars for everything to do the swap and build the trans and sold my old M6 set-up for alot more.
TECH Junkie
Joined: Jun 2008
Posts: 3,202
Likes: 1,390
From: Nitro Alley
you said just under 1500 ?!?! I’ve had my th350 rebuilt TWICE I’m assuming due to crappy work and I’m done with crappy shops I want a legit place to build my transmission supporting up to 450hp and all I’m finding is just over 2 grand ... where did you find a deal like that ?
There for josh2002-ws6 paid that price in 2007 or prior... so at least 13-14 years ago.
Many forum members seem to miss the date/ time marker on each forum post (especially new members)... I have overlooked this myself a time or two.
Last edited by vorteciroc; Feb 2, 2021 at 08:53 PM.
Registered User
Joined: Feb 2021
Posts: 2
Likes: 0
Ah thank you I see now ! The person that wrote the statement (josh2002-ws6), that you quoted... did so in 2007.
There for josh2002-ws6 paid that price in 2007 or prior... so at least 13-14 years ago.
Many forum members seem to miss the date/ time marker on each forum post (especially new members)... I have overlooked this myself a time or two.
There for josh2002-ws6 paid that price in 2007 or prior... so at least 13-14 years ago.
Many forum members seem to miss the date/ time marker on each forum post (especially new members)... I have overlooked this myself a time or two.
