E38+T42 w/ older 4L60E w/o ISS

[vectorbundle]

can anyone post the fix? say i'm starting with matching truck E38/T42 OS pair for 4L70E, so everything except ISS is OK.

tia.

[Taz]

Post your tunes ... myself or another Forum member will take a look.


Regards,
Taz

[minytrker]

I hate to be negative but I do not think there is a way to make it work. I tried to make that combo work in an engine conversion setup and could never get all the bugs out it. I spent hours and hours online, calling every LSX shop I knew, other tuners and no one I talked to ever successfully got one to work 100%. There were alot of rumors that it could work with tuning but once again not a single person knew who made it work or ever saw it in person.
I was working with a standalone harness in an old car so it may be different if your working with a complete vehicle. What issues are you having?

[Taz]

Hello Lorenz,

I see your post is mainly a quote of the previous post #3 - which appears to have been deleted.

As you are well aware, a T42 will control a non-ISS 4L60 - just a matter of configuring the tune.


Regards,
Taz

[minytrker]

I was just posting about my personal experience, wasnt quoting anyone. I know a T42 can control a non-ISS 4l60 BUT what I ran into was it wouldnt work with E38. I was told by many people you could do with with EFI Live but not a single person in the LS comunity that I know (which is alot of people) knew how to do it or had actually seen it work. Lots of rumors but not one known working E38/T42 without ISS. I even posted on here about it and no one had a solution.

[turbo_bu]

Not sure if this helps, but here was what one guy did to get his working:

http://forum.efilive.com/showthread.php?14563-E38-T42-4l65E-(no-ISS)-TCC-fix/page2&highlight=ISS

[minytrker]

I tried all that and it didn't work for me. It had alot weird drivability problems and random torque management.

[vectorbundle]

that's the thing. i have a few ideas how to make this work, but i don't have access to the project car to test them. so i don't want to get into this unless there is a well-defined scheme that i am confident will work the 1st time.

[gmh308]

I tried all that and it didn't work for me. It had alot weird drivability problems and random torque management.

Have been running without ISS downunder for a few years now. Maybe it is the different gravity because we are upside down :).

[minytrker]

that's the thing. i have a few ideas how to make this work, but i don't have access to the project car to test them. so i don't want to get into this unless there is a well-defined scheme that i am confident will work the 1st time.

There isnt anything out that will guarantee it will work. I still havent seen it work yet without any problems. I was able to get the vehicle to run and drive BUT there were alot of little things that were not right.

[Taz]

... Maybe it is the different gravity because we are upside down ...

Nice to finally have confirmation ... recall on Looney Tunes Bug's digging a hole, traversing the center of the earth, ending up in China - upside down.

The opposite Coriolis Effect would seem odd - have become comfortable with the water rotating clockwise as it goes down the drain.


Cheers,
Taz

[minytrker]

Have been running without ISS downunder for a few years now. Maybe it is the different gravity because we are upside down :).

Is yours in a factory setup or an engine conversion. The car I was messing with was an engine conversion with a standalone harness. Im not sure if that was causing more problems or not with no ISS. I have tuned hundreds of engine conversion cars all with zero problems until the E38/T42 with no ISS. I got the car to run and drive fine with no codes BUT it would not go 100% WOT at random times.

[vectorbundle]

it's for a swap. i got a couple of other oddball setups i may have to mail order tune. one is an E67/T42 with possibly older 80E. obviously there basically only 3 things one can do on the programming side. (1) try different ECM/TCM OS pairs, possibly non-matching; (2) swap segments around; and (3) edit the parameters. i have a lot of files and software (TIS, EFIlive, HPT, TCOBD2). if i have a car to play with personally, then i can try different stuff until i get it right.