4L80E behind a 5.3

[clinebarger]

Originally Posted by Heavymetl

As for power robbing, in theory, sure. Over on ls1tech there's multiple threads of track results after switching from 4l60e to 4l80e and there's no change. Several went faster due to the more favorable ratios. Bottom line....if a 4L80E fits, in my mind there's no reason NOT to run one.

I never stated anything about E.T's or Dyno numbers, I was talking about what they rob on take-off and Part Throttle in general, IT IS Noticeable, I have swapped 4L60E's for 4L80E's several times, Of course as BoostedC10 stated a good Stall Converter that gets the engine into the meat of the Torque Band helps a lot, Then More Power & Displacement/Boost makes my point moot.

The OP is going for a Cammed 5.3, A 4L60E will feel Better/Faster at Part Throttle where MOST driving is done. Especially if the cam is too big (Easy to over-cam a 4.8L/5.3L)

If I slapped a Allison 1000 in your truck....You would notice it

[68c10owner]

Originally Posted by clinebarger

I never stated anything about E.T's or Dyno numbers, I was talking about what they rob on take-off and Part Throttle in general, IT IS Noticeable, I have swapped 4L60E's for 4L80E's several times, Of course as BoostedC10 stated a good Stall Converter that gets the engine into the meat of the Torque Band helps a lot, Then More Power & Displacement/Boost makes my point moot.

The OP is going for a Cammed 5.3, A 4L60E will feel Better/Faster at Part Throttle where MOST driving is done. Especially if the cam is too big (Easy to over-cam a 4.8L/5.3L)

If I slapped a Allison 1000 in your truck....You would notice it

I only asked because I dont currently have a transmission for this build. I`m getting a 5.3 core long block from a friend for free. I`m not planning to reuse my 1985 700R4 as its currently on it`s way out anyway.

The cam I`m planning to run is 218/226@.050 .595/.580 113LSA from Tick Performance. He recommended a 2800-3000 stall with 3.73 rear gears. Like i said, I dont care which one I use but I happened to find a 4L80E core for $150. 4L60E cores are going for much more than that in my area.

[Cobalt964ruf]

hey now... I like Allison 1000's lol

[Cobalt964ruf]

and I only run 80's. yes I have built monster 65 and 70's. but in the end a mild 80 will take it all day long. most times for less money. I don't care about parasitic loss I drive a 1ton truck. I care about reliability and cost.

[clinebarger]

Originally Posted by 68c10owner

I only asked because I dont currently have a transmission for this build. I`m getting a 5.3 core long block from a friend for free. I`m not planning to reuse my 1985 700R4 as its currently on it`s way out anyway.


The cam I`m planning to run is 218/226@.050 .595/.580 113LSA from Tick Performance. He recommended a 2800-3000 stall with 3.73 rear gears. Like i said, I dont care which one I use but I happened to find a 4L80E core for $150. 4L60E cores are going for much more than that in my area.

That is cheap for a 4L80E, At least you will have room to grow (Blower/Turbo/more CID), With that cam, & the 2.48:1 first gear....A 3600 stall would be good to get you rolling.

Originally Posted by Cobalt964ruf

hey now... I like Allison 1000's lol

Me too, I have one behind my Duramax

[CROWN]

I did a 4l80 with a 5.3 in a 83 c1 and for what I was trying to do it was the Dumbest thing I've ever done. I was being cheap I had a extra 80e laying around and hindsight I would of found a cheap 60e and put it in. The tune has to be for a 4l80 or it will not work. Trust me! Google segment swap and Ull see what I'm talking about.

[BR3W CITY]

Originally Posted by CROWN

I did a 4l80 with a 5.3 in a 83 c1 and for what I was trying to do it was the Dumbest thing I've ever done. I was being cheap I had a extra 80e laying around and hindsight I would of found a cheap 60e and put it in. The tune has to be for a 4l80 or it will not work. Trust me! Google segment swap and Ull see what I'm talking about.

But why is it the dumbest thing you ever did? It sounds like you had a 4l80e for cheap, which itself is a win. Why would you spend money, to acquire a trans thats weaker? All you need to do is have the tune and wiring setup for a 4l80e, which doesn't cost any more from the start.

Now if you already had a computer and wiring setup for a 4l60e and just tried to toss a 80e in there on a wing and a prayer....well...thats not the transmissions fault.

[CROWN]

Originally Posted by BR3W CITY

But why is it the dumbest thing you ever did? It sounds like you had a 4l80e for cheap, which itself is a win. Why would you spend money, to acquire a trans thats weaker? All you need to do is have the tune and wiring setup for a 4l80e, which doesn't cost any more from the start.

Now if you already had a computer and wiring setup for a 4l60e and just tried to toss a 80e in there on a wing and a prayer....well...thats not the transmissions fault.

We'll the 5.3 I had was bone stock. I shouldn't have wasted the 4l80 on that motor I ordered a PCM and WIRING HARNESS SPEC'd to the vehicle and engine/trans I was using. The problem that I was having was it wouldn't shift into overdrive. No matter what I tried it wouldn't do it. I even had ANOTHER good 4l80 laying around that I knew for a fact worked put in. Did the same thing. After going back and forth with psi and current performance I narrowed it down to the tuning. And just to clarify it wasn't anyone's fault why it would work. That's why im saying I should of just used a 4l60 for a bone stock motor.

[Dieselwrencher]

Have any of you guys used the TCI controller for the 4L80E yet? I was at a local trans shop today asking if they had any 4L80E cores and they said they just installed a 80e in a 69 Camaro and used the TCI controller and it worked out awesome. They said they can't keep 80e's in stock because they have a problem breaking cases at a certain power level? Have you guys heard this before?

[Heavymetl]

Originally Posted by Dieselwrencher

Have any of you guys used the TCI controller for the 4L80E yet? I was at a local trans shop today asking if they had any 4L80E cores and they said they just installed a 80e in a 69 Camaro and used the TCI controller and it worked out awesome. They said they can't keep 80e's in stock because they have a problem breaking cases at a certain power level? Have you guys heard this before?

Breaking cases? Nope. I attended Drag Week this year and the number of folks running stupid fast (8's, 9's) using an 80E was staggering. I'm not doubting your shops claims, but case breakage with a 4L80E seems uncommon.

[clinebarger]

Originally Posted by Dieselwrencher

Have any of you guys used the TCI controller for the 4L80E yet? I was at a local trans shop today asking if they had any 4L80E cores and they said they just installed a 80e in a 69 Camaro and used the TCI controller and it worked out awesome. They said they can't keep 80e's in stock because they have a problem breaking cases at a certain power level? Have you guys heard this before?

I have no experience with the TCI controller.

4L80E cases are not prone to break, I have several out there with 700-1000 horsepower being put through them with no issues. They have the thickest most robust case of all Hydramatics.

Bellhousings breaking is usually from the trans being in a bind (Prying it over to get aligned with a mount, Bad U-joint, Out of balance drive shaft...ETC.

Big power cars with violent wheel hop or Tire shake can do that....Not really the fault of the Case though.

The Lugs around the Intermediate Clutches can crack/break, Builder error....Do not block the 1-2 Accumulator!

I guessing they are talking about the Bellhousing? If the Case wall (Arrow) is busting.....That is run away Line Pressure issues (400+ PSI)

[Dieselwrencher]

They said the cases are cracking along the casting seam on the top of the case. I got on to this subject with them because I asked if they had any 4L80e cores to sell. He told me they can't get enough to use to build and sell, let a lone to resell. That's all I really got from him and why I asked here.

[clinebarger]

I have a hard time keeping cores also, Just not for his reason.
I would hit some wreaking yards.

LSx/Duramax cores run $250-$300
SBC/BBC/6.5L cores run $150-$200

This is regional, So they may vary where you are?

[Dieselwrencher]

I've only found 2 late ones around here for $500ea. I don't really want to spend that much on one since it's going to be rebuilt later.

[LowLifeS10]

Okay, I just bought me an 4L80e for my LM7 5.3. Is this the flexplate and spacer I need to make it work?
FP
http://www.jegs.com/i/JEGS-Performan...ductId=2442580
Spacer
http://www.jegs.com/i/JEGS-Performan...01010/10002/-1

[aknovaman]

I just search craigslist for diesel transmission. Picked up a 80e for $75 last year. You can get a stock converter for a fair price as the diesel converter I usually have a very low stall speed compared to a gas converter.

[slotard]

http://sfbay.craigslist.org/sby/pts/5304560682.html Did they really do 4.8/4L80E in the Tahoe XL? I'd like to do a swap on my C20 and keep it capable as a 3/4 ton truck, I figure the 4.8 should probably make enough power for me (and if it doesn't I'll throw a turbo on).

[clinebarger]

Originally Posted by slotard

http://sfbay.craigslist.org/sby/pts/5304560682.html Did they really do 4.8/4L80E in the Tahoe XL? I'd like to do a swap on my C20 and keep it capable as a 3/4 ton truck, I figure the 4.8 should probably make enough power for me (and if it doesn't I'll throw a turbo on).

I think he means Yukon XL....Same as a 2500 Suburban, the 8.1L & 6.0L were the ONLY engines available in GMT-800 2500 Suburban/Yukon XL.

The 4.8/4L80E combination was only available in Savanna/Express 2500 & 3500 Vans.

[slotard]

So if it's out of a Yukon XL it's a 6.0? 2003 means LQ4 I believe, if that's what it was. What's the easy way for me to tell displacement?

[slotard]

Ok, he says it was in a van. Any reason I can't use it?

[clinebarger]

Originally Posted by slotard

Ok, he says it was in a van. Any reason I can't use it?

No.