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

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

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

Yes it is

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!

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 sonnaxtechsupport@sonnax.com, or phone at (800) 843-2600 ext. 398. Thanks for reaching out!

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

@@chrishansen7004 our tech support team would be happy to help. They can be reached directly via email at sonnaxtechsupport@sonnax.com, or phone at (800) 843-2600 ext. 398. Thanks again, and enjoy your day!

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

Too bad no one cares about them.

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. Thanks for reaching out, and have a great day!

Our product support team would be happy to help you. They can be reached directly via email at sonnaxtechsupport@sonnax.com, or phone at (800) 843-2600 ext. 398. Thanks for reaching out!

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!

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 info@sonnax.com, or phone at (800) 843-2600 or +1 (802) 463-9722. Thanks for reaching out!

@@sonnax Thank you. I sent an email.

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