4l80E conversion and jackshit?

[JSM]

Re: 4l80E conversion and jackshit?

I have been thinking about building my own manual test box for cases like this. could have sent it over to test.

What did the shipping bill alone cost? I would send PCS bill also if they messed up the pins on harness, can't hurt. Couple quick checks with volt meter should confirm deny this as an issue.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

yeah - I think I will bill them althought they are providing me *some* support. Still, I needed to disassemble the trans to make sure it wasn't the solenoids.

I have been waiting 4 days now for them to tell me how to swap the solenoid controls in the software. Wish they would actually send it - have spent a lot of time on the phone with no result.

If you need a guinea pig for your test box then I'm interested

It shouldn't be that hard should it - if you can take a stock ECM and wire in a few switches and enable the auto upshift/downshift then should work.

One thing that confused me though..

A ON B OFF =1
A OFF B OFF = 2
A OFF B ON= 3
A ON B ON = 4

If A and B are swapped then shouldn't it go into second? There was something in the manual about the shift logic being down to engine speed and vehicle speed, not gear selection so that might explain it.

I love this hobby

 

[JSM]

Re: 4l80E conversion and jackshit?

If its swapped it should go from 3rd, then 2nd, then 1st. That would be scary.

I was thinking a simple box wired directly to plug, have a cig lighter to power the "box".

2 switches or maybe a fancy switch would do the shifting. Then somehow work out a way to do line pressure. 1 more switch for TCC.

It isn't built (i do have a pigtail harness), but I have a pile of work backing up already.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

it's going 3-4...?

config file wrong? do i have a 4L60E config somehow? WTF is up with my trans ? :screwy:

 

[skwayb]

Re: 4l80E conversion and jackshit?

Do you wamt me to e-mail you my 4l80e config file for the PCS to make sure it isn't that?

Only thing is I have mine setup to use MAP to controll Line pressure and not the default TPS%. But you could easily switch it back to TPS%.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

Mate,

that would be very kind. I have Jeff's as well but it would be interesting to compare the two if you're still ok? my e-mail is mf_edwards at yahoo dot com

I lay awake in night dreaming of a running truck (bezerks voicemail didn't help - he made a tape of his truck doing 0-80 in about 5 seconds )

I had a bit of a brainwave - the PCS controller can have inverted outputs right? So an output can be HI or LO.

If these were reversed then HI LO would appear as LO HI (1st gear appears as 3rd) and the next gear which should be second LO LO would be reversed and appear as HI HI - 4th gear, which is what I have.

So my truck which thinks it is going 1-2 is actually going 3-4 which is what I have. Although reverse works so I :dunno:

What do you guys think? I'm going to play with it some more tomorrow hopefully.

Wouldn't it be incredible if I just had to configure a software switch and it runs? yeah right... :rant:

 

[bezerk]

Re: 4l80E conversion and jackshit?

your reverse is i believe another solenoid, not a shared clutch like the 700r4's
don't forget to tape a camcorder on your head when you are going to the transmission guy. i'm looking for a good laugh

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

if you really want to laugh then look in your pants

 

[bezerk]

Re: 4l80E conversion and jackshit?

if you really want to laugh then look in my pants

yeah. whatever. i don't care about that shit. you know me better than that.. with you trying to get me in the hottub. how gay is that?

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

you shouldn't be allowed to edit quotes :rainbow:

You went to be early on a weekend - that's even more gay.

Can you put a microphone on your trans so I can hear what it sounds like when pieces fall off and it leaves a trail down the road?

 

[bezerk]

Re: 4l80E conversion and jackshit?

you shouldn't be allowed to edit quotes :rainbow:

You went to be early on a weekend - that's even more gay.

Can you put a microphone on your trans so I can hear what it sounds like when pieces fall off and it leaves a trail down the road?

better to have a working 700r4 than a 10k tranny stuck in 3th.
i know that hurts:rotf:

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

you suck

good info on the separate solenoid.

Anyone know how to change the output from HI to LOW of the PCS unit?

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

so I tried the alternate solenoid triggers (HI/LOW) and also swapping the solenoids.

I made data files of the runs including the manual test mode run where I commanded all gears and the engine note didn't change nor did the performance.

So it is most likley a mechanical issue. I forgot to try disconnecting the computer to see if it would default into 2nd gear (thanks for reminding me AFTER i was there Rene!) but will suggest that to the trans guy tomorrow.

Starting to think that nobodu knows what they're doing with anything on these trucks apart from members of the forum. I thought a trans was a trans was a trans.

iwas kind of worried when the guys said that a 4L80E is pretty hard to mess up - sounds a bit complacent to me

Anyone want to cast an eye over the log files I have?

JUst to reiterate - it starts out in 3rd and will change up to 4th but nothing else.

When I select drive from reverse, it seems to engage very aggressively. George, if you're lurking then PM me please... I could really do with some help on this....

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

ordered an ATSG manual.

PCS confirmed the truck is staying in 3rd gear the entire time.

Any ideas what could cause that?

 

[JSM]

Re: 4l80E conversion and jackshit?

Stuck solenoids? Stuck valve body?

I would put 2 new solenoids in if it were me, they are ~$25 each here so shouldn't be more than $1k a piece there.

If valve body is good, solenoids are good, I would say its inside.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

builder tried the solenoids and said they are good and he said that he would put a stock valve body in to see.

I asked him about it being stuck in 3rd and he was saying the bands that hold 3rd would get all ground up if it were constantly engaging third.

I think there is something wrong inside though, or the harness I have doesn't correspond to the pins correctly.

I'm leaning on the rebuild scenario as that is the kind of luck I have. Bought me an ATSG in readiness for doing it myself...

Assuming the trans has 1 mile on it, what is the cheapest I can get away with on piarts for rebuilding the trans myself? And tooling..John Waller kindly quoted me 2k and I'll prob go to him for parts etc. That was for a 100% reliable build though and with 1 mile on it, I thought that the stuff inside wouldn't be worn out at all so maybe for once I can save a buck. I went with Blakes rebuild kit so the parts weren't cheap/poor quality.

Does anyone speak to him?

 

[JSM]

Re: 4l80E conversion and jackshit?

I would guess if it is stuck in 3rd, worse case you glazed the 3rd clutch pack. New clutch pack.

If the fluid still looks good, then should be ok, if you find garbage I would get TC flushed.

$100 at most if no garbage is floating around. Something is mech. wrong. did you unhook the plug and see if it goes to 2nd?

Put the truck up in air to test, will save lots of wear and tear on clutches until you solve problem.

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

he's putting it in the air to test for 2nd later today. I'm an idiot for not thinking of that on Saturday.

Godverdommuh.

He's unfamiliar with regards to logging the PCS files and laptop datalogging so he can't get the log files. I have to go there myself and do it...

So how much for a syty ready 4L80E then? I knew I should have bought the package in the FS thread the other day lol. You can never have too many spares...

 

[Quickstop [UK]]

Re: 4l80E conversion and jackshit?

so it defaults into 2nd with not TCM connected which I guess means the trans is probably ok....

I spoke with Russ at PCS support and he is starting to think that the wiring harness is wired incorrectly. It's a 5 min job with the multimetre but the truck is an hour away from me and they shut before I finish work - damn city living with no garage.

If it isn't the wiring then there is a possibility that it is the driver on the output of the TCM. They have said they will FEDEX me a new unit if it appears that it is the PCS unit.

I'm considering taking Friday afternoon off so I can get to the trans builder and identify this.

Man i love this truck..

 

[bezerk]

Re: 4l80E conversion and jackshit?

just drop the pan, and measurer it up at the solenoids. it's at the tranny workshop so they prolly got a lift, it's a 5 min job to check the pan, and see what reading you got at the solenoids. maybe you got the power switched? like put 12v on the ground and grounded de 12v. so now your solenoids work visa versa. think easy. solve the problem or find it, instead of working around it and hope something is your problem.
than again, i know you're a smartass and u prolly don't drop the pan but spent 1000min on calling with the controller guy and sent 100 mails about the controller. if you find the problem they are easier to work with instead of letting them geuss as much as you're geussing.