703crewchief

Can someone help me by letting me know if I can retrofit an older model 4l60e to work in a 2007 Silverado? I know the 2007 has an input or turbine speed sensor and the 2002 does not. I know the 2007 input shaft has the reluctor machined into it and the sensor and wiring harness would have to go in as well. What other parts would have to go in the 2002 case, or is it even possible?

Any help would be appreciated.

mrvedit

To "upgrade" a 2002 4L60E for Input speed sensor (ISS) you would need a a new input shaft, pump, sensor and in-trans wiring harness. However, since the input shaft is tightly pressed into the input drum, you basically need a ISS drum/shaft combo and rebuilding that part of the trans.
Just a new speed sensor is $120 from the dealer!

My suggestion is to skip all that and have a tuner remove the codes related to the input speed sensor. I do not know for a fact that is possible, but I would expect it to be.

Raffman

iTrader: (8)

Any more info on this? I'm going through this right now and is driving me crazy.
I did a 2006 5.3 engine, computer, and harness swap into a 65 El Camino but used a 2002 4l60e. It is basically in default (limp) mode and have checked everything, including a complete tear down of the tranny. This has got to be the problem ! Does anyone know for sure if this function can be tuned out of the ecm as it looks expensive to add all the pieces of the ISS to the older trans......Anybody??

mrvedit

If I have time with weekend I will download a 2006 tune from the HP Tuner's repository and look for codes/tables related to the Input Speed Sensor (ISS). I suspect that disabling codes related to a bad ISS will make it work, but there is no way I can determine that for sure.
You might look for another forum (Trailblazer SS?) in which members all have 2006+ PCMs and see if they have gotten non-ISS transmissions to work.

Update: I opened the stock tune for a 2007 Trailblazer but could not find any DTC related to input speed sensor.
I found something stating that P0716 is the input speed sensor code, but there is no P0716 listed in HP Tuners.
Sorry, I don't have the answer to your question.

aleks2505

Can someone confirm what years transmission had ISS? Some say it started in 2004, others say in 2006. Thanks.

mrvedit

From what I can research and has been discussed here, the ISS was phased in starting with 2006 models. So some 2006 models will have it and some will not. I recall a reputable claim that some 2005 models had it, perhaps very near the end of that model year. You can count the pins in the connector to determine if the trans has ISS - ISS has 15 pins, earlier non-ISS have 13 pins.

What is important is that a 2006-2009 ISS 4L60E will work fine with a Gen-3 "411" PCM because the PCM isn't even connected to the ISS pins. However a non-ISS trans will not work with a GM 2006+ TCM that expects ISS.

Is there are particular reason you are asking this question?

Perttu Fihlman

Hi, from this thread you can see what trannys I was told has the F..G ISS...
https://ls1tech.com/forums/automatic...y-options.html

MaroonMonsterLS1

@Perttu Fihlman This was a year ago.
Let it go man, you don't need to be dropping links to your threads when nobody asked...if someone were to ask and your thread is relevant...ok. But don't muck up an old thread by linking to another

F Zee

Hello mrvedit, I need your help. I've spent 3 hours online today for answers to my situation and finally came across your expertise on 4l60e's. My 03 Express 2500 5.3 4l60e transmission (green connector) has taken a big crap on me. I found a wrecked 07 Chevy 1500 4.8 4l60 (black connector) at pick n pull. Your post states that the 4l60e swap from 03 to 07 is feasible. My questions are :

​​​​​​1. Is it plug and play (green connector to black connector)?
2. Is it possible to swap the 03 transmission wire harness to the 07?

Thanks in advance.

vorteciroc

No, it is not plug and play... The correct internal transmission wiring and external transmission wiring have to match as well as the correct ECM/ PCM.

I really would just look for another 4L60E transmission without ISS. It would be most ideal to find another 2003 model.
You can find one if you try... the 4L60E is the MOST popular electronic 4-speed auto in the world.

MaroonMonsterLS1

if your van is a 2003...and you're trying to swap in the used 2007 transmission...it should be plug and play.
The connector pins for the ISS won't be used...so it will be fine
All other pin locations are the same.

2007 trans--->2003 van is OK

2003 trans--->2007 truck is NOT OK

vorteciroc

Thank you.
I should have clarified...

Not being "plug and play" in the sense of:
A person using a 2007 ECM/ PCM with a 2003 transmission and not see any ISS data/ connection and set the appropriate codes, No lock-up, ETC...

axeroad

Great INFO & answer....
Your quote:
"However a non-ISS trans will not work with a GM 2006+ TCM that expects ISS"

Story .....I believe I accidentally did just that. I have a 2006 Silverado (6KCD) in which the transmission (4L60E) went a couple months ago. Bought one from a wrecker (4KCD) and had it installed at a private shop, no clues from either party about an ISS harness (or plug color). Transmission was fine for a couple weeks and then started slipping in OD when my son was using it for a move. SO ....I know the used tranny could simply be the cause of the problem BUT........

Questions:
1) I am just wondering if the lack of an ISS in an older transmission, in an ISS '06 truck, could also cause the same amount of grief?
2) If not ....what could be the potential problems or syptoms to result from that swap?

PS ....vehicle is far away atm, cannot confirm today that there is a purple or 15 wire plug because the vehicle ....but will get to it soon.
Thanks

bbond105

Installing a pre-ISS transmission in a vehicle that an ISS transmission came in turn on the check engine light. Slipping in 4th gear could be the 2-4 band is worn beyond its service limit.

axeroad

Thanks for the reply ....check engine doesn't sound like any transmission damage would result then.
Must have been the used transmission.
I did have very occasional and momentary second gear upon slight release of throttle for engagement to 3rd.
Reverse, 1st and 3rd were all good ....full revs in 4th/OD, no hookup.