4l80E conversion and jackshit?

[Quickstop [UK]]

Like it says. I don't have a ****ing clue. the tuck feels like it's boost launching everytime i try to take off. but the reverse is doing pretty well. I do intend it to be a daily driver. so that not might be an option.
btw. It's a PCS controller and feels like it's stuck in second.

cheers:lol:

 

[NecroWolf]

Re: 4l80E conversion and jackshit?

i know the 4l80e tranys i work on with a stand alone controller default into second if there is electical problems

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

really really high revs to get it going forward but reverses fine?

just found out I had the TOSS/VSS sensors in wrong and it has low fluid. Have not driven it apart from out the garage and the end of the street and back so hope I didn't fry it.

Controller seems to work perfectly - hooks up to laptop, registers ECM inputs apart from coolant (?)

Indicating the wrong gears though. I'm going to fill up the fluid tomorrow and try and see if that fixes it, but if that's the prob, why is reverse ok and going forward sucks?

Can I tell which gear it is in on the controller somehow?

Damn this thing gives me some headaches!

 

[NecroWolf]

Re: 4l80E conversion and jackshit?

how high is really high? a combination of a higher than syock stall and locked in 2nd gear could cause that. on the stand alone systems i work on a bad tos/vss would cause it to lock in second but reverse is fine. i would think your tcm could give you all information trans related

 

[MRKING]

Re: 4l80E conversion and jackshit?

i know on my tci dash on the laptop it has a gear indicator . while filling the fluid make sure you go through the gears a couple times , it took me a couple shots getting my 80e filled . now just my tune holds me up .

when you are in park , n , r what does the pcs info on the laptop say ?

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

how high is really high? a combination of a higher than syock stall and locked in 2nd gear could cause that. on the stand alone systems i work on a bad tos/vss would cause it to lock in second but reverse is fine. i would think your tcm could give you all information trans related

2800 stall - I need to fill it tomorrow but am still confused with the FWD/REV discrepancy. TOSS/VSS were corrected but still doesn't shift properly?

To go forward I need around 2000 rpm but in reverse maybe 1200. Feels very different.

i know on my tci dash on the laptop it has a gear indicator . while filling the fluid make sure you go through the gears a couple times , it took me a couple shots getting my 80e filled . now just my tune holds me up .

when you are in park , n , r what does the pcs info on the laptop say ?

it has the little gauge in the computer display which indicates wrong but the green box says the correct gear.

On the blue bar at the bottom with 1,2,3,4 etc it doesn't say which gear but it seems like it is one gear off from the green box.

It's screwy

But it runs and I drove it and Mr Jack from Tennessee helped my night

Thanks for your input guys

 

[JSM]

Re: 4l80E conversion and jackshit?

pcs has a gear indicator. As mentioned the 80e takes a couple trys to get full of fluid. If the controller isn't talking to trans it WILL default to 2nd as mentioned also.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

seems the controller IS talking - how do I know if it isn't?

I was prepared for the amount of fluid it takes - 15 qts or so but DAMN if it isn't taking more than I thought Buying another 5ltr tomorrow :tup:

How do I know which gear it is in? The green box is accurate but the little gear selector icon isn't.

Seems like I am real close to it working. How can I tell if VSS and TOSS are connmected correctly?

Also, in N it says I am at 60mph but in gear it works right.In "P" it also thinks I am at 60. Is my base tune messed up?

If you know how to change the analogue inputs so that it reads CLT that would be good too. The manual says it shouldn't use nalogue 3/4 for the CLT but the wiring diagram and info on this site says that is OK. E16 on the ECM gives me the engine CLT but the PCS controller doesn't readit - I get -50C the whole time?

WTF?

Thanks guys - I drove it today so now maybe I can make it a good truck

Thank you

 

[denny]

Re: 4l80E conversion and jackshit?

I had the TISS and TOSS crossed, it drive fine under normal driving, just the MPH was a little off, at WOTits noticable. Drove for about 3 weekend beore I figured it out, it didnt hurt anything.

For the CLT, even thought on the PCS harness it have a wire for CLT, you also need to config one of the analog input, I als have a post here on it.

I think its gear selector is N P N 1, it dosen't change to 2 until you are driving and it actually changed gears.

Yeasterday was the first time I drove the ty in 3 months, I don't remember where I left off.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

I managed to get both the MAP and CLT inputs to receive from the ECM so that was good.

I topped up the trans with another 4 litres of fluid then tried again.

Reverse seems mich firmer but I am still having the same problem with FWD. It feels like it is stuck in 2nd.

Everything seems to work properly apart from the 2nd gear default issue. I am hoping it's a simple fix ie software config in the controller....

I drove it up the lane and back and now have a data file. Could someone take a look at it and tell me if they can see something? Can you PM me with your e-mail if you don't mind?

Thanks in advance

PS my neighbour came round and complained. Apparently the noise of my truck with a 3" exhaust at 2psi and 2300 rpm is not in keeping with the retired community where my parents live :rant:

 

[bezerk]

Re: 4l80E conversion and jackshit?

what do you think a log looks like if you are stuck in second. that is not something anybody would be able to read.? you files seems good idleing, and that's about all you can say about it untill it drives.

 

[bezerk]

Re: 4l80E conversion and jackshit?

i just took a look at your file..seems like you are boostlaunching it to move forward....
everything seems way off. check your transmission first before you destroy it

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

correct inputs allocated to the controller? etc etc...

is there line pressure indicated? if notm is it a software config (in the settings?) or is it that the sensor isn't talking?

at least looking at a log file can help a little bit.. its a data file from the PCS TCU, not from Datamaster

 

[JSM]

Re: 4l80E conversion and jackshit?

email me the file and I will look. The line pressure reading you see on PCS is not an actual line pressure, there isn't a sensor in the trans to read line pressure to begin with. There is a solenoid that adjusts it, but it can't read it.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

Just an update in case anyone gets a 4L80E with these symptoms.

The guys at PCS are really helpful and have looked at a log file I made. It appears as though it is engaging the solenoid for 1st gear but the output shaft speed looks like it is in 3rd gear. They think that the solenoids have been swapped over in the trans as they use the same connectors.

Apparently this is easy to do. Hopefully that means it's easy to fix. The trans guy is getting the whole truck shipped to him today. (Incidentally, has anyone else had a truck shipped 9000 miles to get it repaired?)

Jeff, I saked the trans guy about an external pressure switch for the trans and he said you could only plug in the gauge to read pressure, not actually shift gears.

is this guy giving me some :bs: ?

I should have some more info tomorrow after the trans guy has tried to swap solenoids.

What he said was that as my shift pooit was at 18mph and I only got up to 15 mph, it would have upshifted to 2nd (in reality a downshift) and seeing as i was at around 3 or 4 psi it would have launched!!

Can't wait to drive it. I'm going to the trans shop this weekend to try some diagnostics. Fingers crossed it's an easy fix.

 

[JSM]

Re: 4l80E conversion and jackshit?

This is not the one I saw but works the same way.

http://www.etoolcart.com/schaffer-shifter-hd-SS-SESS-HD.aspx

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

aaahh...

I thought if you removed a plug then you could apply pressure and change the gears hydraulically...

I wish I could justify buying that Looks cool.

car got picked up a few hours ago so hopefully I'll have an answer by the end of the week.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

so A and B solenoids are reversed somehow. Truck starts out in 3rd then shifts to 4th ok but doesn't like doing 1st and second for some reason.

Trans builder checked valve body and solenoids and says they are ok so hopefully a rebuild isn't necessary though I am still not sure.... The solenoids can't be connected the wrong way due to the configuration of the pins so he says that's not it.

PCS reckon they might have a fault with the wiring loom that has the pins swapped on the outputs for the trans so A and B are reversed.

Wish I knew more but I will need to check the wiring diagram on Saturday when I go there with my g/f.

Hopefully it is an easy software switch. Whatever it is, it's still a pain in the ass that has cost me yet more time and money

Better than a rebuild.

For one horrifying second the guy told me that the 4L80E and 4L60E took the same connector on the trans and I thought I might have a 4L60E(xploding) trans. Turns out the VSS and TOSS connectors only go on an 80E so my panic whilst palpable was shortlived.

The trans guy doesn't own a remote device for switching the 80E so he can't check anything else

Update to follow on Saturday.

 

[bezerk]

Re: 4l80E conversion and jackshit?

ain't it fun you pay sombody to do the job, n\and than have to go trough the same shit AGAIN.. put it on, take it off! i wish was there to see this shit. maybe you can strap a camcorder around your head and broadcast the situation?

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

nothing ever goes right man.I know what you mean.

Might send PCS the bill for the tranny investigation. Am reading up the tech charts and software on this trans.

So much for just plugging it in.

Godverdommuh.