See What's Inside the New Sonnax 4L80-E Performance Pack

It’s easy to upgrade GM 4L80-E and 4L85-E work/sport vehicles for maximum performance and durability with this new comprehensive kit. Innovative components work together to precisely recalibrate pressures and shift accumulation, delivering firmer shifts under load without sacrificing low-speed drivability. Plus, target common wear areas in the transmission with many top-quality parts to repair damage, prevent future wear and improve reliability.
Watch this video to get the full breakdown, and click here to learn more: www.sonnax.com/parts/5460-per...

[@aubreyroche5080]

I'm getting ready to build my 6.0 2500 Silverado and 4l80e this spring... thanks !

[@nyertsenginetransmission3861]

Nice kit thanks for all that you guys do.

[@sonnax]

Thanks so much for your kind words, we really appreciate your support!

[@keysautorepair6038]

Sonnax best in the business end of story.

[@sonnax]

Thank you so much for your kind words, we really appreciate your comment!

[@faxxzc]

Can you make a similar performance pack for the zf 6hp26 and 32 transmission?

[@sonnax]

Hello and thank you for your inquiry, we will pass it on to our new product development team for review. Have a great day!

[@chrishansen7004]

Is it possible to make a 4l60 shift almost as quick and smooth feeling as the 8/10 speed transmissions? Even with a Corvette servo it still feels kinda slushy and awkward feeling, it would be cool to get that sexy sounding pop shift that the new Camaros have as well but I guess I'm asking for a bit much haha

[@sonnax]

Hi Chris, good question. There are a few reasons why a 4L60E won’t shift quite like an 8/10 speed transmission: 1) The 4L60E uses a band for the 2nd and 4th gear shifts. The shifts take longer to apply by design because there are more components involved. Later 8/10 spd units are operated clutch to clutch, which allows for quicker shift transitions. 2) The 4L60E is only a 4spd unit and has a rather wide ratio gap between gears. Models with more gears will narrow this ratio gap, for less rpm drop and quicker shifts and acceleration. 3) Regarding the popping sound between shifts, this has more to do with engine tuning. Later performance vehicles often use a form of fuel cutoff between shifts to mimic lifting the throttle for a smoother transition. The temporary lean condition and any unburnt fuel in the exhaust can ignite and cause the pops and crackles. The good news is Sonnax offers a variety of performance products for the 4L60E that can improve upon this: www.sonnax.com/gm_4l60e. Feel free to contact our tech support team for help. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@chrishansen7004]

@@sonnax how much less would the rpms drop with the 2.84/1.57 gear kit shifting around 6K rpms?

[@sonnax]

@@chrishansen7004 our tech support team would be happy to help. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks again, and enjoy your day!

[@Steve.191]

Is this a good idea for heavy duty work vans?

[@chrishansen7004]

Yes it is

[@julianoliva2850]

Where can i get the stage 2 sonnax conplete kit for a 4L60e ???

[@sonnax]

Hi Julian, we sell all of our transmission parts through authorized Sonnax distributors. You can easily find the one nearest you right on our website: www.sonnax.com/distributors. And feel free to check out these handy 4L60/E build guides to help you pick the right parts for max performance and durability in your build. Thanks for reaching out, and have a great day!

[@cantyoufeelthelove]

I can't find this kit in stock anywhere? I have looked on your distributor list, emailed many of them and ordered from 1, but it's been on back order for a while. Any chance you guys are shipping any out within the next month?

[@sonnax]

Hi Austin, sorry to hear you're having trouble locating this kit. Our sales team would be happy to help. They can be reached directly via email at [e-mail], or phone at [phone] or [phone]. Thanks for reaching out!

[@cantyoufeelthelove]

@@sonnax Thank you. I sent an email.

[@sonnax]

@@cantyoufeelthelove You're welcome, thank you for your interest in this kit!

[@nela5596]

I got a 06 van with a Duramax Engine n 4L80e tranny, with this kit can I safely make more power? If so how much more? Thanks!

[@sonnax]

Our product support team would be happy to help you. They can be reached directly via email at [e-mail], or phone at [phone] ext. 398. Thanks for reaching out!

[@jeromeburrasca6710]

How about the 6L80 too?

[@sonnax]

Hi Jermone, we sell all of our transmission parts through authorized Sonnax distributors. You can easily find the one nearest you right on our website: www.sonnax.com/distributors. And click here to see everything we offer for the 6L80: www.sonnax.com/units/301-6l80. Thanks for reaching out, and have a great day!

[@alexsimz5933]

4T80E, it could use some milk.

[@CoreMaster111]

Too bad no one cares about them.