Thanks for the heads up… I took a look at my spec sheet from when I ordered the truck and I did get the 3.21. I did see some of the mixed reviews but wanted to ask you if you heard anything about the Diablo pulsar? I see some mixed reviews on it but I actually have the Diablo on my 14 right now and it didn’t make a difference although a lot of it comes with the throttle positioning sensor I think. I called up the tech line at Diablo today and the gentleman I spoke to said that if you change your tire size through the pulsar it actually helps with the gearshifting at a different time then maybe it normally would be with the smaller ones. I think there’s also a way to change the ratios around too? The only thing that sucks about it is that it actually says their device disables MDS which would be great but you and I know the only way to do that is to use the gear limiter. I really want to put 35s on my truck work but will sacrifice and go to a 295/60/20’s if need be. My truck won’t be here for three weeks so I have time too
Actually, I just bought a Pulsar and put it on my truck. Here is a link to my thread with my thoughts on it. Read both of my posts in the thread.
https://5thgenrams.com/community/threads/pulsar.6200/
Another member here says that it does not help with the gear shifting as it doesn't change shift points. I haven't noticed any shift point changes the 2 days I've been using it. However, you can always put the actual truck in it's own tow/haul mode(not the pulsar). This DOES change when it shifts gears and keeps the truck in the more powerful RPM range. I have not used this mode much but it does make a noticeable difference. However, I have yet to get the truck into 8th gear with it and my 34" tires, but I haven't had a chance to use it on the highway much at 65+.
The Pulsar is a neat tool and I will report more on it once I am able to get a fresh tank of 93 gas and play in performance mode. It takes the dead spot out of the throttle even on tow mode which is nice. Between correcting the speedometer and taking the lag out of the throttle, it does do exactly what I was wanting so I will likely end up keeping it. If it was in the $300-$350 range it would be a no brainer. I got mine for $450.