 I'm Kyle with Cobb Tuning. I'm here with my friend Eric who's the lead calibrator for the Nissan GTR platform We're coming at you direct from the belly of our 2009 Nissan GTR development vehicle for Cobb and today's topic We're gonna be talking about transmission control module off the shelf Optimized shifting maps a bit of a mouthful. We'll call them TCM OTS maps for short Eric can you tell us a little bit about why these maps are a necessity and also kind of what you did behind the scenes and access tuner to create Yeah, so as most of our customers that have driven GTRs know the factory shift schedule leaves a lot to be desired The car really shifts into six gear really really quickly at low mile per hour Which is great for gas mileage not so great for you know, you know, it feels like a very good enthusiast car So what we did is we went in decided that we're gonna make some TCM OTS maps that are a little bit more aggressive We went into the software and the tables that we adjusted are tables that are Mile per hour versus accelerator pedal position So some of the light load light accelerator pedal position stuff We went in made the shift schedule a little bit more aggressive both in the ups and down shifts. Cool so essentially what we're doing is creating an Auto mode map that would drive as if the car were a true manual. Yeah, exactly. Cool. Let's go ahead and Show you guys what it's like to accelerate from a low mile per hour And how quickly we get into six gear on the stock TCM automatic map So we're gonna take off, you know, really light load here. We're at about 18% pedal position as you can see the car is already shifting feels very sluggish Just kind of looks around you're at 1500 rpm if you were to kind of accelerate and drop some gears How does that? So it takes a while is that like 60% throttle drop two gears over at least a couple of seconds or so Not ideal for a supercar or an enthusiast feel for your transmission We're gonna go ahead and pull over and flash the Cobb optimized shift OTS map and see the differences All right guys. We're back in the GTR. We've got the TCM OTS optimized shift map flash to the TCM Eric can you show us the differences between the old one and what we've got currently flash now? Yeah, so we're gonna do pretty much the exact same test on the exact same stretch road We did with the factory shift schedule stuff So we're gonna kind of just accelerate up here about 18-20% pedal position Same as before yeah, you'll be able to see that the car just now shifts a lot later than it did on the OTS map stuff Makes it a lot nicer to drive. So we're in about Fourth gear at roughly 40 miles an hour or hasn't shifted into sixth gear like it did previously So again, like you said, it's just kind of acting as if it were a true manual and you were driving the car Yeah, exactly. So, you know here you can see we're holding a speed of 46 miles an hour 45 miles an hour in fifth gear The car will not shift into sixth gear Until you know we tell it to us. Oh, that's gonna be kind of nice much nicer to drive around well So you'll notice that the car will downshift and kind of engine break much more Aggressively than it did previously the stock transmission will not really shift down until you get to almost stop speeds Right, it's gonna hang out fifth and just fall the gears yeah exactly Which is got you it's done the cars doesn't feel very good when it's not a Prius. It's a GTR. Yeah, right, right cool well Thanks for taking the time to show us the new optimized shift maps and you guys can flash them on your GTR at home