willhorne22

I'm going to do a 4l80e swap. I am gathering a huge parts list but am kind of lost on the torque converter flex plate stuff. Every thread of every swap it seems like someone does something different.

The Truck: 2006 Silverado 1500 Z71 4.56 gears 37" tires 5.3l engine 14 bolt rearend

New Transmission: 4l80e 4wd 2004 model.


This truck will never be built for speed or towing. Its a daily driver that I take on trails on weekends for fun.

Can someone give me the best options between conversion flex plates and conversion torque converters. With my setup should I just run factory torque converter with Conversion flexplate?

Thanks a ton for the advice.

tgui

With those tires and the higher 1st I'd look at a higher stall speed to help get moving. Add in a big cooler too.

I temper this response in that I don't know what kind of trails you run and if a higher stall would cause a heat problem.

Factory stall is in the 2000rpm range I think? Circle D makes a conversion converter that stalls as low as 2600.

http://www.circledspecialties.com/p-91-gm-278mm-hp-4l80-ls-torque-converter.aspx

With my circle D I still upgraded the flexplate for insurance. The stock one can fail with stock power. I used a TCI.

I did a guage cluster swap to a model with a trans temp guage (I hate pods). At a 3200 stall and a true cool 40k I've not seen more than 150F.

If you want to save money, slap in that trans and stock convert with a conversion flexplate and go!

willhorne22

Thanks for your advice, Your build thread is one of the big reasons I'm going to do this conversion.

I think I will get that torque converter you suggested.

What is the cheapest way for me to get a good custom tune and be able to swap my transmission file when the time comes?

tgui

I'm glad my dumbass could help you

You might be able to eBay another pcm and see if a tuner can bench load a custom 80e tune. Swap in when you're ready. Sell old pcm.

Wolftrk99

iTrader: (5)

The stock stall for the 4l80 behind the 5.7/4.8/6.0 is closer to 2400... Least expensive way to go would be a factory flexplate with adaptor and if you dont need a highstall converter stay with a stock converter..... Which being you have 37s with 4.56s a slightly higherstall wouldnt hurt but if yourenot planning on running a cam the stock 4l80 converter would be fine.. 4 wheeling you dont necessarily want to be in power curve, alot of times lower speed will get you further in mud....

tgui

It depends on the converter he has. B81 B82

Here are the stall speeds for those factory converters.

http://racetransmissions.com/store/index.php/cPath/21_32_152

Wolftrk99

iTrader: (5)

Still higher than a 4l60 with its 1600 stall

1FastBrick

iTrader: (17)

4L80E Specific part numbers in this link

You need the flywheel, the spacer, and the 6 longer bolts.

If you don't have the dipstick and tube you will need that too.

Blwn99x

I have an FTI 4000 stall in my 80e swap, I used my factory 4L60E flexplate, just tell that to FTI and they will build the converter with that bolt pattern. Then you can use stock flexplate and bolts, or new ones which come with the converter. And the dipstick is like 100 bucks, or 80 I can't remember

willhorne22

Ok, so depending on my budget I may just use the factory one as long as its the B82.

Do yall know if the blackbeartune - AutoCal and EFILive V2 Email Tuning would let me swap the 4l80e? or they could do that for me?

Or is the hp tuner the best bet?