4L80E 1-2 Shift Advanced Hydraulic Discussion

[@christophersanders5007]

I recently rebuilt my early model 4L80E with your stage II kit for a crew cab 4X4 truck. The mistake I made with my 1-2 shift was when I did the TransGo AFL valve bore modification, before I did a full rebuild on my trans, that comes with a spool valve that has an inner and outer spring. I removed the inner spring for a firmer 1-2 shift...that was a mistake on a heavy duty application with a stock torque converter. When I did a complete rebuild on my trans I installed that inner spring back in. That did the trick, and now it shifts right for a truck application. I took that TransGo 3-layer plate and trashed it. I did the internal dual feed, and installed a stock plate that I drilled out all the shift holes to the smallest .031 diameter. I also did all the mods that your stage II kit comes with such as the output roller bearing. My 4L80e will probably live longer than I will.

[@whereisamerica7384]

I would really like to see a auto trans tuning(Holley) discussion. Cameron Powers has been a huge help the past few years, but it would still be great to hear tuning tech. Thanks for sharing knowledge

[@cameron878]

Jake taught a bunch of the stuff I know about 4L80es. I might try and put a "how to tune your 4L80e" video together with all the pertinent stuff in one place

[@whereisamerica7384]

@@cameron878 that would be great. Thanks a lot. I really appreciate it.

[@mattrodgers4878]

I learn something from every one of your videos. Thanks!!

[@professormetalhead2763]

Thanks Jake. Always good info

[@dalethomas9307]

I currently run a holley terminator X without transmission control and I am in the process of switching to 4L80. Would I be better off going with a US shift guick 4 over a holley terminator, X that can control my transmission as the one I have currently does not. I ask this question because you mentioned in the video that the holley Terminator X shift strategy leaves some to be desired. Is the shift strategy better in the US shift quick 4? For context my set up makes around 1000 hp in a 3200 pound truck.

[@jakeshoe]

Yes, the US QUICK 4 has adaptive learning and is more user friendly. It is RPM based with throttle percentage for shift points.

[@m.a.p.4hp737]

I wish I knew 10% of what Jake knows about transmissions.

[@yellowlt1ta491]

My 80e D3 hasn't wanted to consistently do a wot 1-2 up shift. I've tried everything and got tired of messing with it. It's been sitting for a long time. I'd like to get it fixed thinking about sending you back the D3 and seeing if upgrading to your current version would help.

[@jakeshoe]

@@yellowlt1ta491 Let me guess, Holley controller?

[@yellowlt1ta491]

@@jakeshoe yeah but I can command a 3k rpm max shift and it will blow right through the shift command and hit the 7k rev limiter.

[@jakeshoe]

@@yellowlt1ta491 This is an issue with the Holley oftentimes but have you checked the dipstick for accuracy? Checked pressures on the shift?

[@yellowlt1ta491]

@@jakeshoe yes after talking to you about the issue like 2 years ago I had swapped out the shift solenoid to an AC Delco and added a pressure sensor for line pressure and converter pressure and have logged it. I have a line on the dipstick that is equal to the pan rail. I have it filled to about 1/4" past that.

[@jakeshoe]

@@yellowlt1ta491 What are the pressures and what do they do on 1-2?