Shudder on WOT 1-2 shift

[SHOdded]

well, technically no stronger VB.  But you can add a Sonnax ZIP kit, I think it is 400$ maybe.  Definitely a DIY project if you follow the included instructions, and pay attention to detail

http://www.sonnax.com/parts/3743-zip-kit

http://www.americanpowertrainwarehouse.com/6f50-6f55-transmission-sonnax-zip-kit-valve-body-upgrade-fits-07-ford-6f50-zip/
https://www.transmissionpartsusa.com/6F50ZIP_6F50_ZIP_KIT_p/400-006f50zip.htm

 

[rahi93]

Hey guys, newbie here.

I bought a 2011 back in September 2016. Second day of owning, I noticed a slam into 2nd gear after what felt like a clutch slip. Over time this got progressively worse. A PCM reset helped for a day or two, but the problem always came back.

Luckily, I got a CarCare plan along with the car so I took a trip to the dealer. On the way there, I decided to record my trip. As soon as I felt the "slip" I looked at the dash, and the PRNDS light within the gauges went out. Dropped off to the dealer, showed them the video, and they said they'd have their trans tech look at it. He was able to replicate the issue and called me back saying "Hey I saw the rear-view camera turn on before the car slammed into gear." I never noticed that, but he did say he saw the PRNDS light go out too.

After some more tests, he diagnosed it as a faulty transmission range sensor. Replaced and haven't had the issue since.

Again, I'm a young newbie, so I may be talking out of my ass here. Just figured I'd let you guys know how I got rid of the problem.

 

[SHOdded]

very good point.  We don't often get people having TRS issues, so a mention is always good, esp with a TSB out for it & all!

 

[StealBlueSHO]

Hey guys, newbie here.

I bought a 2011 back in September 2016. Second day of owning, I noticed a slam into 2nd gear after what felt like a clutch slip. Over time this got progressively worse. A PCM reset helped for a day or two, but the problem always came back.

Luckily, I got a CarCare plan along with the car so I took a trip to the dealer. On the way there, I decided to record my trip. As soon as I felt the "slip" I looked at the dash, and the PRNDS light within the gauges went out. Dropped off to the dealer, showed them the video, and they said they'd have their trans tech look at it. He was able to replicate the issue and called me back saying "Hey I saw the rear-view camera turn on before the car slammed into gear." I never noticed that, but he did say he saw the PRNDS light go out too.

After some more tests, he diagnosed it as a faulty transmission range sensor. Replaced and haven't had the issue since.

Again, I'm a young newbie, so I may be talking out of my ass here. Just figured I'd let you guys know how I got rid of the problem.

Thanks for the info! I would be more concerned with it if the issue followed tunes... however, it does not. 3 Tuners have worked on my car...the 4+X is the only one that produces this problem and only after it settles. Leads me to believe its tune related and not so much mechanical..in any event, the newer soft shift version doesn't seem to have this problem..

well, technically no stronger VB.  But you can add a Sonnax ZIP kit, I think it is 400$ maybe.  Definitely a DIY project if you follow the included instructions, and pay attention to detail

http://www.sonnax.com/parts/3743-zip-kit

http://www.americanpowertrainwarehouse.com/6f50-6f55-transmission-sonnax-zip-kit-valve-body-upgrade-fits-07-ford-6f50-zip/
https://www.transmissionpartsusa.com/6F50ZIP_6F50_ZIP_KIT_p/400-006f50zip.htm

Thanks for the information! I read somewhere there were a couple guys that did this modification and said it wasn't worth the money..

 

[StealBlueSHO]

So I have done extensive testing with various tunes and have made a few observations.....

1: The shudder on the 1st to 2nd shift corresponds DIRECTLY with the torque reduction or shift modulation when it shifts. What is that? Well... Ford, LMS, and Brad all utilize the built in method Ford uses to reduce spark(among other things) when the car shifts. This shows up as a Source Torque 7 event in a datalog. Now, you can reduce how how much shift modulation the ECU demands when it shifts... this coupled with tuning how fast and hard the transmission shifts is some of the modifications that are made with the various tunes.  I have found that when the shift modulation is reduced in how much it steps in corresponds with this shudder...

Other tuners like BCB and Unleashed remove all the torque control from the transmission and instead, manually manage the spark and other variables to achieve the same thing. Different approach to achieve similar results.

2: Adaptives in the transmission appear to play a big role in how well the transmission reacts to these changes in the torque management. AT LEAST for my vehicle... If I load the LMS tune and start hammering away, chances are I will start to shudder at the shifts. I have found that if I go easy on the car and drive it through it paces allowing the transmission to adapt, then when I do hammer on it, the issue does not present itself. I had Brad adjust this in my tune as well and had the same stuff happen to a T.

3: Since I don't daily drive my car, I tend to not allow the car to adjust to a tune before I start hammering on it... this is not much of a concern for the motor as I do let the OAR adjust, but apparently is more problematic for the transmission. Driving it to and from work when I go in (50 miles or so round trip) tends make a drastic difference in how the car shifts.

Anway... just thought I would update... we will see when winter comes and the temps drop as that was the more problematic times.

 

[ajpturbo]

Other tuners like BCB and Unleashed remove all the torque control from the transmission and instead, manually manage the spark and other variables to achieve the same thing. Different approach to achieve similar results.

.

If you dont see torque source 7 you are not getting shift modulation and torque reductions....i do not believe there is a way to manually manage spark during shifts for torque reductions......if you are seeing a spark reduction during a shift its likely because load increased from the boost spike and spark follows load. That would not be shifting torque reduction

No torque source 7 no shifting torque reduction

 

[StealBlueSHO]

Other tuners like BCB and Unleashed remove all the torque control from the transmission and instead, manually manage the spark and other variables to achieve the same thing. Different approach to achieve similar results.

.

If you dont see torque source 7 you are not getting shift modulation and torque reductions....i do not believe there is a way to manually manage spark during shifts for torque reductions......if you are seeing a spark reduction during a shift its likely because load increased from the boost spike and spark follows load. That would not be shifting torque reduction

No torque source 7 no shifting torque reduction

Interesting... that one tune you sent me the load increased and the spark did not drop due to load while were testing some stuff out.

 

[ajpturbo]

Other tuners like BCB and Unleashed remove all the torque control from the transmission and instead, manually manage the spark and other variables to achieve the same thing. Different approach to achieve similar results.

.

If you dont see torque source 7 you are not getting shift modulation and torque reductions....i do not believe there is a way to manually manage spark during shifts for torque reductions......if you are seeing a spark reduction during a shift its likely because load increased from the boost spike and spark follows load. That would not be shifting torque reduction

No torque source 7 no shifting torque reduction

Interesting... that one tune you sent me the load increased and the spark did not drop due to load while were testing some stuff out.

A few of those tunes were really goofy and highly experimental...There were effects on the shifting and torque management that were really odd...I'm thinking the tunes and logs should be expunged from memory.....But at any rate I'm just saying I haven't seen any functions that would enable a type of spark reduction for shifts if NOT using the torque source 7

 

[StealBlueSHO]

Other tuners like BCB and Unleashed remove all the torque control from the transmission and instead, manually manage the spark and other variables to achieve the same thing. Different approach to achieve similar results.

.

If you dont see torque source 7 you are not getting shift modulation and torque reductions....i do not believe there is a way to manually manage spark during shifts for torque reductions......if you are seeing a spark reduction during a shift its likely because load increased from the boost spike and spark follows load. That would not be shifting torque reduction

No torque source 7 no shifting torque reduction

Interesting... that one tune you sent me the load increased and the spark did not drop due to load while were testing some stuff out.

A few of those tunes were really goofy and highly experimental...There were effects on the shifting and torque management that were really odd...I'm thinking the tunes and logs should be expunged from memory.....But at any rate I'm just saying I haven't seen any functions that would enable a type of spark reduction for shifts if NOT using the torque source 7

goofy to say the least... after those I am not really interested in any more experimental tunes... can't afford a new motor right now..  you could always look at the unleashed tune you purchased from Torrie. Because he doesn't use torque management on his shifts either.. might give an idea on how he is managing it...