darcati Posted January 28, 2019 Share Posted January 28, 2019 Need to pick the forum members brains on a ZF issue i have with my built ZF. When it does the 2-3 shift in drive on light throttle at around 2000rpm it lets go of 2nd revs rise briefly before 3rd comes on rather than being quick and smooth. It feels like the delay between 2nd letting go 3rd engaging is too long BUT changes below 1500rpm and above 3000rpm are fine. Being new to this I'm not sure if I should I be adjusting off/on going pressures and where would these changes be done? Appreciate any help in advance. Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted January 31, 2019 Share Posted January 31, 2019 Sounds like it's flaring slightly Quote Link to comment Share on other sites More sharing options...
Yortt Posted February 1, 2019 Share Posted February 1, 2019 On 1/28/2019 at 2:35 PM, darcati said: Need to pick the forum members brains on a ZF issue i have with my built ZF. When it does the 2-3 shift in drive on light throttle at around 2000rpm it lets go of 2nd revs rise briefly before 3rd comes on rather than being quick and smooth. It feels like the delay between 2nd letting go 3rd engaging is too long BUT changes below 1500rpm and above 3000rpm are fine. Being new to this I'm not sure if I should I be adjusting off/on going pressures and where would these changes be done? Appreciate any help in advance. Provided your transmission settings are standard copy the torque converter settings (yes torque converter settings) from a standard sprint tune and try that, it helped mine. 1 Quote Link to comment Share on other sites More sharing options...
darcati Posted February 3, 2019 Author Share Posted February 3, 2019 Thanks Yortt i'll give it a try. Quote Link to comment Share on other sites More sharing options...
Tonez89 Posted September 8, 2022 Share Posted September 8, 2022 Did you ever figure this out? I’ve got the same issue Quote Link to comment Share on other sites More sharing options...
hjtrbo Posted September 8, 2022 Share Posted September 8, 2022 Post up a tune and log man, I'm keen to try and help out. Still learning the ZF's so may end up being hopeless to you. Presume box is in good nick? Give us a bit of info of what's been done. Create a new log layout with just the following channels. Less channels to make it log fast as possible. RPM Throttle Position Current Transmission Gear ID Of Used Shift Pattern Difference speed to synchronous speed Nominal value TCC speed difference (value) Pressure, on-coming clutch Transmission Input Shaft (Turbine) Speed Nominal value of the CRC slip time Pressure, off-going clutch Shift Pattern Throttle Input Value Transmission Oil Temperature TCC Pressure Flywheel Torque Transmission Output Shaft Speed Current Line Pressure Quote Link to comment Share on other sites More sharing options...
Tonez89 Posted September 8, 2022 Share Posted September 8, 2022 It’s an fg na+t,the problem only started after the tune I got,it was doing it in all shifts but I upped the shit pressures 25% and it solved the problem in all other shifts besides the 2-3. it shifts out of 2nd firm and then is like someone very slowly double clutching in a manual and then slams into 3rd,I’ve been talking to the tuner and he’s got no idea what could be causing it,I’ll chuck up a copy of the tune and do a log and chuck that up aswel 2morro arvo Quote Link to comment Share on other sites More sharing options...
Tonez89 Posted September 8, 2022 Share Posted September 8, 2022 This ford/pcmtec stuff is confusing compared to Subarus and using ecuflash 😂 Quote Link to comment Share on other sites More sharing options...
hjtrbo Posted September 8, 2022 Share Posted September 8, 2022 Agree it's a bit overwhelming when 10,000+ parameters are available for adjustment. Just need to break it down into little bits and stick to the basics / first principals. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.