99+ 4L80 swap
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
99+ 4L80 swap
From my search I found some info for the older 80 swap behind a sbc, anyone use a newer unit yet? The hawks 1 3/4 and the fat Trans and pan will make for a PITA for a x member and running my dual exhaust as usual I'm sure.
Need some more warning for what I'm getting into.
Need some more warning for what I'm getting into.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Really? I'll dig through his post. He is very thorough.
Re: 99+ 4L80 swap
Yeah, mine was an 03
Fluid line in the rear and the strange pan were the only differences from the older units I noticed and neither had any impact on fit/function
Fluid line in the rear and the strange pan were the only differences from the older units I noticed and neither had any impact on fit/function
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Great! Think I'll make the Trans x member connect to sub frames. Seems it would be better all around and relocate the TA arm to it as well.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Trans is out of the 3/4 ton. Looks like it will be pretty simple. Just wondering how lucky I will be to make the dual 3 inch that was for my T56 that fit my th400 fine will fit this long Trans. Converter is in as well(3800).
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
I'll be damned if revmax didnt build me a 3800 4l60 converter. Teach me not to BS with the tech while ordering. Since I didn't pay attention to the build sheet I put fluid in it and realized when I was going to install it on the Trans. Couple hundred for shipping and cutting the new wrong parts open to clean and sell as new, I went ahead and upped the 4l80 piece to 4000 stall speed.
Trending Topics
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Just got my 4000 stall 4L80E converter from them Tuesday.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Good, hope mine comes in by the time I am off so I can get this thing done and measure the DS and have it cut.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I got their Stage 5 version because of the power the stroked 6.0 could make.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
How much was that?
Called today...yesterday actually, my converter got there on the 27th, they have not finished my correct unit.... Hate being set back by stuff but this is really bad.
Called today...yesterday actually, my converter got there on the 27th, they have not finished my correct unit.... Hate being set back by stuff but this is really bad.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Trans is in, had to play with the mustang to get the steering shaft modded so i could get it out of the garage. Will get the mount built soon and some pics.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Well, I used one in the TA, it is in the mustang now. Works great so far. It is a 4500. Foot brakes 2000 on the street with 235/60/15 junk radials.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Price is right because they build what you need and not over build
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Tight fit the more i keep hooking stuff up. Still was enough for the TCU harness to plug in. Going to work on the X member today i think.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Ill be darned if there is no way to adapt the 4L80 yoke to the stock drive shaft. Thats another 300$ i was not aware i was getting myself into.
Last edited by five7kid; Apr 16, 2013 at 01:52 PM.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Same kit i used. That does not look like the underside of a third gen in your pic, correct?
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Here is where im at now:

One more brace has been added to the passenger side since this pic. Should work, but i had to make the TQ arm relocate over to clear the tail housing and yoke. Still have to pull it back apart, finish welding the spots i couldnt get to and throw some black over it. Still need to wire the trans controller in, finish plumbing and make a TPS sensor bracket. The drive shaft will hopefully be done today.
One more brace has been added to the passenger side since this pic. Should work, but i had to make the TQ arm relocate over to clear the tail housing and yoke. Still have to pull it back apart, finish welding the spots i couldnt get to and throw some black over it. Still need to wire the trans controller in, finish plumbing and make a TPS sensor bracket. The drive shaft will hopefully be done today.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Usually about even with the sub frames give or take a slight touch. Never had a issue with any of that. Think my aluminum th400 pan has been the lowest but is thicker than all other sheet metal stamped pans.
Re: 99+ 4L80 swap
Mine was a shoestring budget using the stock shifter/cable so it was a bit different
After it was complete, I saw a pick of a tight clearance bracket flipping the cable 180* towards the engine. Wish Id done it that way from the start
Can sort of see it here

How much lower than stock did both of your trans pans end up? is it lower than the subframe rails/crossmember?

For mine, the header collectors were lower than the stock trans pan or crossmember
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Wow, i have no room to complain about that after at least having a bracket made for the swap and just being able to tweak that and the shifter arm. Good job as usual pocket.
Joined: Jun 2001
Posts: 8,028
Likes: 93
From: DC Metro Area
Car: 87TA 87Form 71Mach1 93FleetWB 04Cum
Re: 99+ 4L80 swap
I'm just wondering if I'll be annoyed with it in a significantly lowered car? The suspension setup I'm tempted to put on the current TA is off of my '83, which I ended up flattening 2 stock 700r4 pans in (they wouldn't it on bumps, they would hit on a high speed dip...)
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
And.....that's why I have not lowered a third gen yet.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Hoping the change get the pipes tucked up higher. I'll probably have pics when I get it to the exhaust shop.
Joined: Jun 2001
Posts: 8,028
Likes: 93
From: DC Metro Area
Car: 87TA 87Form 71Mach1 93FleetWB 04Cum
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Mine was about the same. This is just a longer Trans.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Feels fantastic. Set the tuner to shift at 6400 till i get the tune right witht he engine. Otherwise, she feels great for being a 198K mile 4L80. Hooks pretty decent for the most part as well. I will dial the pinion angle back in where i want it when she is on the lift for exhaust. Might be spot on for all i know. But the 5.3 does not make the torque of the 6.0.
Will be ready for daily drive duty in no time.
Will be ready for daily drive duty in no time.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
So far. I am the first I know to try the edelbrock 2216 carb LS cam. Wants more rpm as you can tell. Plenty more in her with tuning. Then I'll hit the track. I'd be happy with a 8.0 1/8th mile. Anything faster and I am really happy. Friends 5.3 went 7.8, he had ported heads, mine aren't. He had 3600 converter and 3.90s. I have 4000 and 4.30. Also o have aluminum block to his iron. Will be close.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Shucks, I was hoping to see/hear overdrive and TCC lockup... 
You didn't do a shift kit, right?

You didn't do a shift kit, right?
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Nope, bone stock 198 K mile trans from the 01 3/4 ton that got crushed on Xmas by 2 pine trees.
Lock up comes on just above 2500 rpm. Think it is perfect so far. Still have not run it past 6400 rpm yet. Going to retune the TCU in a bit. Exhaust is on and thank god. Was just way too loud. Now I can think.
Lock up comes on just above 2500 rpm. Think it is perfect so far. Still have not run it past 6400 rpm yet. Going to retune the TCU in a bit. Exhaust is on and thank god. Was just way too loud. Now I can think.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Here is the exhaust:
Here is a better test drive:
My dad cannot shut up for the life of me any time i want him to be quiet.
Here is a couple pics at the exhaust shop:


Drives fantastic. I am pleased, but still dying to get it to the track. Will run allot harder when i up the shifts to 6900 as well.
Here is a better test drive:
My dad cannot shut up for the life of me any time i want him to be quiet.
Here is a couple pics at the exhaust shop:


Drives fantastic. I am pleased, but still dying to get it to the track. Will run allot harder when i up the shifts to 6900 as well.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Upped the shifts to 6900 and it hits perfect. 4L80 with high miles and the TCU work as well as they can.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Thanks guys, wish I would have used a X pipe. Would promote some more power and probably sound even better.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Dec 2006
Posts: 5,538
Likes: 0
From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: 99+ 4L80 swap
Doing great, took her to the track, the best was a 7.7 in the 1/8th at near 91 mph. 1.75 60 foot. The revmax converter is tight, but dang good for the street driving the wife and i do. So, i cannot complain. Went a tenth faster than i expected!
Thread
Thread Starter
Forum
Replies
Last Post
Hello, Michael
Engine Swap
8
Aug 20, 2015 03:19 PM












