The 15 pin unit (2007 & 2008) can & does work in a 13 pin 1996-2006 vehicle. The extra 2 pins in the case pass-through connector are not in the harness. There is no tuning involved!!!

If you want to go the other way you have to disable the ISS reporting in your tune....

You cannot swap from one generation transmission into other generation vehiles without the proper TC adapter. GEN2 to GEN 3

 

Disabling the ISS reporting in the tune can be troublesome. It can result in "phantom" type shift performance and timing oddities as well as converter function issues.

I don't recommend this unless in an absolute bind...but with the abundance of these ISS units...it's not hard to find one and have a proper buildable core for whatever year you need.

 

Delphi produced many different TPAs for what we use as the 4L60E/ 4L80E Transmission Connectors.

They were produced in different Colors, Pin-Counts, and Key-Ways.
There are maybe 40 different Variants of TPAs.

Here are just a few Examples of the different Key-Ways...
The "Standard" Keying is shown in the Center Position:





The Different TPAs of course need Matching Mating TPAs.
Below shows a Keyed Set of TPAs/ Connectors that would NOT Mate with any of the "Standard" 4L60E/ 4L80E Connectors:

 

Vorteciroc,
Very impressive layout of information, only an experienced engineer would know all of this.
I have experience designing connectors/etc. for the electronic industry and there is a lot to know.
Right now I'm getting a number of transmission P codes on my 2006 Tahoe (4L60E).
Some people are telling me that likely the big connector is having connection issues possibly caused by trans. fluid contamination.
What are the chances that disconnecting the connector and attempting to clean things up will work?
I'll also look at the contacts as best I can to see if there are obvious issues.
Thanks for any assistance. I couldn't find where to send you a PM so I posted here.
-Henry

 

I have an 02 Silverado that the mice have chewed through every wire going to the transmission. I have an 03 Silverado wiring harness available with what appears to have the same connectors on it, although some of the wires are different colors. Should I be able to just splice the 03 harness in to the 02 wires that are damaged and be back in business?

 

This was great read , im puting a 1997 4l60e in a 1957 chev pick up with a 1995 lt1 eng and using a payless harness which has 13 pins / using computer from 1995 cameo do i need to change or upgrade soft ware i found a post about jumping pin t and pin u to gather but does say what years will work any idea please thank you

 

anybody

 

Your 1997 4L60E is definitely of the "PWM TCC" type with 13 pins including T and U. (See 2nd pinout in post #6 above).
Presumably your 1995 PCM supports the "PWM TCC". However since this is the first year of PWM TCC, perhaps someone can confirm it, as I fear that was a transition year with some 4L60E being PWM and some leftover ones not.
Hopefully someone more knowledgeable can chime in.

 

thank you

 

Thank you for all the great information! I have the 1996-2000 version and it is leaking through the pin side of the male connector. Is it possible to replace the TPA seal to stop that leak without removing the harness from the transmission?

 

My nephew put a 07-08 4l60e in his 09 Silverado. He didn't notice it was different until it was in. Is there anyway to make it work? I'm capable of modifying the transmission harness and can get the modules from a pick a part yard and program it if needed. Only reason for asking is he spent all of his money on the transmission and really needs to get his truck fixed

 

This is an old informational thread. The mods should close it out of respect to the OP and make this a sticky.
To put it bluntly, no. I tried myself a few years back. The 2009 and up units use a internal mode switch. This one part eliminates 2 parts used in previous years. The neutral switch & the FPS (fluid pressure switch). 2009 and up wiring is all internal with its 17 pin connector. The older has 15 pins and the external harness for the NS... Sorry for the bad news.

 

First, since there were reasonable posts less than a year ago, I'm not inclined to close this thread just yet.

Next, since I have modified a 2009+ trans to look like a 2006 trans, I would like to graciously and humbly disagree with Tranzman and say that yes, it can be converted, but might be more difficult than you like.
ts been 10+ years, but here is my memory of it:
* The trans does not need to be removed.
* You will need a 2009+ valve body
* You will need a 2009+ harness
* IIRC you will need to install the 2009+ shift shaft

To summarize my experience, not knowing anything about these transmissions at the time, I installed a 2010+ 4L60E/4L70E and quickly learned that it would not work with my 1998 PCM. That started my voyage here, first learning how to modify it to a PCM compatible, learning ever more, starting to help others, and becoming a moderator. In those early days, I would remove the trans and rebuild it several times a year to test different aftermarket parts, friction sets, valve body mods and more. I also still have a spare 4L60E around, mostly disassembled so that I can study parts.

Note that these steps refer to updating a 06-08 4L60E to look like a 09+ 4L60E/4L70E. A pre-2004 Trans CANNOT be converted to a 2009+ because it would not have the necessary ISS (Input Speed Sensor). (Well, not unless you pull the trans, replace the input shaft, the pump and more.). But a 2006-2008 4L60E can be converted without removing it, as it has the ISS.

 

As MRVEDIT says it can be done. Swap VB (PROBABLY NEEDS UPDATE ITSELF) Wiring harness, Shift shaft and PRNDL switch. This can all be done in vehicle .
IMO though if its a used trans I would likley not go to the trouble.

 

I've got a 2008 Chevy. Silverado 4l65 15 pin in the truck. And I can't get a transmission but I can get a 2009 4l70e 17 pin transmission and am I not understanding the wiring wont-work or is there a certain way? I can wire the paytel so it will work. And I can have it programmed by my tuner.please need advice

 

Your situation is the opposite of post #71. You would need to:
* You will need a 2006-2008 valve body
* You will need a 2006-2008 harness
* You will need to install the 2006-2008 shift shaft and PRND switch. These parts should exist on you current 2008 Trans.
Since you evidently have a poorly working trans, I would not use the valve body or harness from it. Get a rebuilt 2006-20089 valve body and a new harness.

While an exact 2008 4L65E might be hard to find, you can use any 2006-2008 4L65E.

 

Curious for some help from someone with more experience.

Have a 2011 Silverado that I had a shop put a reman transmission in. It is shifting hard into 2nd and sometimes will go from drive to low. It is throwing the P0973 code, which researching thru Charm says it is a shorted or open 1-2 shift solemoid. From your info here I see that is Pin A on the transconnector. What pin is it on the TCM? If it is shorted I should see it on my volt meter going from Pin A to ground correct?

By the way thanks for all the info posted. Thought I would never find this info.

 

You should be able to find the info that you need here.
LT1 Swap.COM, Wiring Info, PCM Programming

 

I already know how to read schematics and nothing there pertained to what I asked about.

 

You ask what pin it is on at the TCM? If that is not the question, then what is your question? Are you asking if Pin A should be grounded when the 1-2 shift solenoid is energized?