Whats this about modified trans needing modified tunes?

[cleatus12r]

Originally Posted by Robert6401

I'm quite positive that I asked prior to the install of my John Wood transmission whether or not my chip needed to be reburned, and I was told no. I would say that a JW trans is a modified trans, wouldn't you? And now the sales website and other threads here say that a modified trans requires modified tunes. So what gives?

In honesty, my truck runs fine with the combo, BUT I now feel like my tunes are the limiting factor as opposed to the transmission. I was planning to send the chip in for some changes to the tunes when I get home from this deployment, but now I'm wondering if I'll have to pay the $200 upcharge to get what I'm after due to this change in procedure.

When you ordered yours, we were still modifying the standard calibrations to work with transmission modifications (that's why your chip with "standard" calibrations was more expensive than what Corey charges now).

I don't understand what you mean about the sentence, "I now feel like my tunes are the limiting factor as opposed to the transmission."

In addition, I don't think that there's EVER been a time that Bill or I have told someone that a valve body change (or a complete aftermarket transmission like a John Wood or BTS) wouldn't need tuning changes. If nothing else, we will caution that the shifts will likely be way too firm afterward. Didn't you have your chip reburned at some point because of that already? I could be wrong.

EDIT:
I was wrong. You had a reburn for the TCC apply issue during the 2-3 upshift.

[Robert6401]

Originally Posted by cleatus12r

When you ordered yours, we were still modifying the standard calibrations to work with transmission modifications (that's why your chip with "standard" calibrations was more expensive than what Corey charges now).

I don't understand what you mean about the sentence, "I now feel like my tunes are the limiting factor as opposed to the transmission."

In addition, I don't think that there's EVER been a time that Bill or I have told someone that a valve body change (or a complete aftermarket transmission like a John Wood or BTS) wouldn't need tuning changes. If nothing else, we will caution that the shifts will likely be way too firm afterward. Didn't you have your chip reburned at some point because of that already? I could be wrong.

EDIT:
I was wrong. You had a reburn for the TCC apply issue during the 2-3 upshift.

No changes in tunes since the transmission install. What I meant by that comment is that it was obvious that the transmission was the limiting factor in the equation when it was stock, especially now that I know what a good trans is supposed to feel like. I can tell now that the power is getting to the wheels more efficiently and the trans isn't holding me back. I would like to get some more aggressive tunes, or perhaps even dyno-tuned now that I feel like the transmission is built (and warranted) to handle it.

So, I'm still confused. Do I need to update my tunes simply due to the fact that I added the performance trans? Thanks Cody, it's good to hear from you.

[cleatus12r]

Originally Posted by Robert6401

So, I'm still confused. Do I need to update my tunes simply due to the fact that I added the performance trans? Thanks Cody, it's good to hear from you.

If the shifting is working well for you, then there is no reason to change. What is normally done with aftermarket transmissions or valve body/shift kit changes is the shift pressures are left stock, not increased as is the case for tuning for a stock transmission.

You're not missing out on anything!

[Robert6401]

Well, I had been planning to get some changes to the tunes when I get home because the shifting can be a little harsh at times. I also wanted to swap out some tunes. I guess I probably need to talk to Corey about whether I'll have to pay the upcharge since my trans isn't stock.