4T60-E verse 4T65-E tuning

[Z26-T]

Recently helped do a 3400 swap in my friends 98' Century. His OSID wasn't recognized by my DHP. I attempted to flash it with a 98 Malibu .bin that I had modified with 2000 Montana fuel tables, but was having VATS issues. (not exactly sure what I missed there.) Well, long story short, we were able to get the car running on a 2000 Montana file that we uploaded from GM (lied about the Vin). However, the 2000 Montana file is for a 4T65e, not his 4T60e. So the car now runs great in first and second.. but doesn't shift into third or forth. What tables am I supposed to modify in the 2000 Montana file to make it work with a 4T60e? I'm using DHP and Tiny Tuners. I compared the parameters between the malibu and montana that I can change. But nothing is really sticking out to me.

So to summarize, 98 Buick Century, stock PCM, 3400, stock 4T60e, 2000 Montana programming in stock century pcm, won't shift into third or forth.

Thanks for all your help! As you can see, I still have much to learn about tuning.. The Beretta is a little easier since I don't have to worry about the transmission stuff.

[3400-95-Modified]

Why not flash it with a 98 Monte Carlo file for the 3100 4t60e combo? that seems like a better fit than 2000 Montana.

[Z26-T]

Tried that, but it was having VATS issues. I can't find an actual walk through to delete the VATS with DHP or Tiny Tuners. Can someone tell me what i'm missing?

[3400-95-Modified]

I documented this somewhere... give me a few min to find out what it was, but IIRC you need to also change any of the DTC's associated with VATS to be no reporting.

[3400-95-Modified]

Changes I made to a 98 Cutlass file I had rigged to edit...

Under Security
VTD is Disabled set to 1 aka yes < some bins already are.
VTD Auto learn timer is 1 < some bins are 0 that's fine.

DTC Fault Type
P1626 changed to 3
P1629 should be set to 3 as well < some bins already are.
P1630 changed to 3 < some bins already are.
P1631 changed to 3 < some bins already are.

Do the same to the 98 Monte and it should work fine.

EDIT
I just checked the 98 Monte file I have and VTD is disabled, and 1630 and 1631 is set to 3... only one that isn't changed is 1626.

Your using a Malibu file thats why... Making changes right now for you.

Um confused on why you changed flash checksum stuff and security located under diagnostics... is that for another reason? You also had the VTD removed like I had done at lest from what I can see.

Try using the 98 Monte file with the changes I suggested since that's for a W-body where the Malibu is for a N-body... the Century is a copy of the Monte where the Malibu is a copy of the Cutlass... Pinout's might have been different between the 98 Malibu vs 98 Monte...

OK final edit...

I made the above changes to a 98 Cutlass I just verified the Change log, that was all that was done and the VTD system was completely disabled after that. User was having issues with it resetting and having to wait 10min for it to auto learn again. I did the same for my moms 01 GA when she started to have the issue. Make sure 1629 is also set to 3.

[3400-95-Modified]

Try this one, make any other changes you need but don't change any security stuff.

[Z26-T]

Thanks for the changes Jon. I looked at the changes that you did and I believe they're the same ones that I did on my first .bin. (I tried various different things in case I missed something.) But I will try this on Monday and see what happens. After it's programmed, basically just start the car? I don't need to attempt a 10 minute relearn or anything?

[3400-95-Modified]

you shouldn't have to do any relearn since it SHOULD be 100% shut off and yeah I know my file is close to the same as what you did, BUT you said you tried using a Malibu file... As I noted who knows what the pinouts are on a N-body ECU vs a W-body Ecu... the Malibu file may not work on a W-body platform hence why the Monte one might. It's just a thought but this is what I did to two Passlock vehicles to completely disable the relearn timer as well as the system as a whole since one of the vehicles would constantly error out requiring the 10min wait. I do not know if this shuts off the security light though... It may not.

[Z26-T]

Well.. Since I was away at SEMA my friend decided to find another route to fix it. To get all 4 gears out of his 4T60e with 4T65e programming he added three wires to the PCM connector (Using a PCM pin out for a 2000 Montana) and grounded them. He installed wires for the TFP Switch signal B, Signal C, and the TCC release switch signal input to the PCM and grounded them. (I'm not sure if you need the TCC release switch signal grounded to have it work or not.)

So basically, since TFP switch signals A, B, and C were open (since the 60 doesn't have them) the PCM went into a sort of limp mode, inhibiting 3rd and 4th. But with it getting a signal (Ground on TFP switch signal B, C) it allows shifting to 3rd and 4th gear. He tried a couple different combination with grounding signal A and found that it would only allow shifting to 3rd. With Signals B, C grounded and signal A open, it works fine.

I'll keep everyone updated..

[3400-95-Modified]

You could also just change the trans type code in Tiny Tuner to reflect its a 4t60e and not a 65e... I left that info out since that should not have to be done since there should be a perfectly fine w-body bin file alternative to use that already has that marked off.

[Z26-T]

The PCM pinout from the W body and the Century were a lot more different than the Century and the Montana. That's the reason he decided to stick with the Montana programming. I found it to be extremely informational to know that just with a program, the control module will want new inputs which it previously didn't utilize. Also changes which driver does what.. etc.

[3400-95-Modified]

The century is a w-body isn't it?

What charts did you compare? You only said you tried a Malibu file which is a N-body...

Either way I've given my info, it's not my car so he can run whatever file he wants and have whatever wire mods he needs to make it run, not the best way in my opinion.

[pocket-rocket]

I'm not sure what body it is, but it isn't a W.

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[robertisaar]

the 97-up Century is a W, it's basically a cheaper version of the Regal.

[pocket-rocket]

the 97-up Century is a W, it's basically a cheaper version of the Regal.

Wow, learn something new every day.

One of these days GM is only going to sell 2 models company wide with about 20 different model names, lol. Oh well, cheaper parts that way

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