I have a frind who did the Lightning swap and now is having troubles with his transmission, He posted this on another forum but nobody has a clue when it comes to conversion trucks over there.


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I'm still having problems with 3rd gear

got the new tune file this morning truck run fast but the gear is giving me a headache got it checked by a transmission guru!!!! and transmission is still good install tuner to stock runs like sh** but gears are thrown perfect!!! made data log for the sct x3 tuner send it to jj hopefully he has great news for me monday morning!!!!

if returning to stock makes it shift good then i still think is the tuner unless is spark plugs sensor have no idea please help i posted up a video on youtube on what it does when driving normal speed 15 to 25 speed limit. Everytime i get to a red light or stop sign rpm is going up to throw gears slides ,jump then comes back dont know watta hack is causing that not even my mechanic knew video is here check it out and let me know please?

truck rpm accelerating in normal speed after 3rd gear - YouTube

you can see on the video that it looks like im accelerating but no its doin that itself let me know what you guys think?

 

Without more details its impossible to say. Hard to read that mess too. From what I could understand it does sound like a tuning issue. However if he drives it much on the stock tune he won't be having these problems anymore

 

If it's alright without the tune and it doing that when he puts the tune in. Only one thing it could be. The tune is off.
At least that's what I would think.

 

Seems to be a converter unlock issue based on what I'm seeing, but it's difficult to understand what is actually happening from the post and video.

 

yeah its certainly the tune. possibly lock and unlock schedules are wrong

 

problem goes worst and worst to even worst took it to dyno shop to get the dyno pull made 2 pulls air: 16.18 fuel: 16.37 told me it was extremely high did not want to make 3rd pull because motor could of been blowned!!!! when i took it out did not want to run on 3rd gear when i put it in 3rd is like i have it in nuetral now can only be rann it 1st and 2nd gear which i rather have it parked



installed stock tune and again did not run on 3rd just 1st and 2nd?

 

i got this email from jj from woodbine after sending him the 1st data log


Most likely you have a vacuum leak somewhere.

If you notice on your datalog the short term fuel trims are in the positive by about 20% and that means the computer is adding fuel but whats more important is that one bank of cylinders is trimming about 6% worse then the other so you will have to look into that as well.

The tune I have attached should be datalogged the exact same way.

JJ


i feel like just selling the truck already and give up on when i cant find the problem or solution

 

at first 3rd gear would slip but eventually throw it now transmission shifts into neutral check engine came on.

running lightning blower on my n/a engine kept my stock ecm and transmission 4r70w put a valve body kit. took codes to 5 different tranny guys and they all told me its ***** up now it seems like tranny is burned and needs a rebuilt


error codes received

p1747: pressure control solenoid A short ck t
p0755: shift solenoid B {ss-b)
p0743: torque converter clutch (tcc) solenoid ck t electrical
p0740: torque converter clutch (tcc) solenoid ck t open
p0758: shift solenoid B (ss-b) electrical
p1760: pressure control solenoid A short ck t intermittent
p0443: evaporative emission system purge control valve ck t
p1451: evaporative emission system vent control ck t
p0155: o2 heater (htr-21) ck t (b2,s1)
p0135: o2 heater (htr-11) ck t (b1,s1)


is there a way i can just get an entire kit for a rebuilt and have them install it but i mean a kit that will make tranny stronger with more strenght not a stock rebuilt cus then it will mess it up again any suggestion? or do i just have to have tranny shop do everything?

 

I'd retrace my steps on the valve body kit. Most of your codes are electrical components and the torque converter. You might want to get hold of Darren Burch in the transmission forum and talk to him.

 

Yes, talk to Darren about it.
He can help you and if you do need a good tranny, I would buy one from him before I would let just any tranny shop build one for you.
It might even be cheaper from Darren and he builds a great trany.
Lot of guys on here has his work in there trucks without any problems.
He has a website also!
http://www.bcatransmissions.com/

 

ive been havin a 3-4 shift problem for over 3 months after my swap. even after numerous datalogs with jj

i cant get a hold of darrin at all.

no CEL either.

 

trust me, ive datalogged the shift problem several times, and nothing is coming up.

ive put in 24 PIDS into just the transmission and nothing showed up.


what is a flight recorder?

 

have your tuner load the stock transmission value files into your tune and email you that and then road test

 

i bought mostly all the parts from mikes list

the only thing that im using from my n/a motor is my wire harness/vacuum lines/ecm and transmission everything else got from mike

i only bought blower midplate,lower intake,brand new 42lbs injectors seeprately


truck is being checked the transmissiion wiring was removed and checked and seem on good condition late monday i should have news if its my engine harness or vacuum lines. is that does not do the trick im sure it has to be the transmission what else can it bee? maybe when valve body kit was installed spring broke or maybe shift solenoid is bad i smelled trans flui the other day looks pink but did smell a little burnt dont kniow if that can help you guys at all.

the other thing that concerns me is when i sent data log to jj i was told that one side of the bank cylinders was throwing 6% worst than the other what can be causing that short term fuel? so right now i have those 2 problems the shifting and the cylinders that is throwing more gas than the other truckis to lean air/ratio is to high!!!

 

yes and still having same problem in overdrive you can go up to maybe 60mph and not throw a single gear sometimes in nuetralizes it self