Whats up guys & gals, my names Josh, I just got an 06 300c SRT8, its basically stock with Mopar intake & Mopar catback exhaust. I was reading on here about TSB's and how these cars have a delayed 1st - 2nd shift at WOT, and that if you take that into the dealer they can reformat something for you or fix that problem. Well, thats what I did, and yes it corrected the delay at WOT, but now it auto shifts for me at redline automatically when I'm in the manual shift mode :cry2: (let me emphasize this, it AUTO shifts for me in MANUAL shift mode) :getlost: Ok, so now, I remember reading somewhere that once the TSB is done, theres no going back? Is that true? & is there a way to change that with a DiabloSport or something? Your help/advice/knowledge is more than appreciated! :bye:
Yes its true that after the fix there's no going back with your current chip/set up and if I recall you have to buy a new one. Forgive me for not being super-technical, but I'm sure the experts will chime in soon. :welcome: to the C! :dance4:
Yes, that's what they did to the '07 to fix the 1-2 shifts On my '06 (since I didn't want to lose it) I bought an other PCM & TCM had those installed, than did the Diablo Tune
Yes, that's the behavior with the TSB flash. Yes, the Diablosport Predator gives you the option to restore the old behavior if you want it. The deal was this. The PCM uses a predictive algorithm to decide when to initiate an upshift in automatic mode. They came out with the 6.1L SRT8s after the 5.7L. They used the same constants in the algorithm for upshifting (oversight). Well... at WOT the 6.1L winds up a lot faster than the 5.7L. Same transmission. Initiating the upshift at the right time for the 5.7 was a little too late for the 6.1. Transmission takes the same time to complete the shift but the 6.1L can hit the rev limiter before it happens (many had the problem and some didn't). So... for whatever reason they decided to change the behavior in stick mode when they fixed that. It will shift before you hit the rev limiter if you're headed for it. The DS Predator has an option to set the TCM in the old mode so it will hold the gear no matter what and bounce off the rev limiter if you hit it and you still have the fix for the upshift in automatic mode.
Very well put, thankyou for explaining that for me. A burnout just isnt the same when it finally tach's out and bogs back in 2nd on the burnout pad. fail. lol :bigwink: now if i restore the old behavior, its going to delay the shifts still correct? basically what im trying to figure out is, is there a happy medium? can i keep the delayed shift at WOT and turn off auto shift? or does it not work like that? just one or the other? sorry for all the questions, and thankyou ALL for getting back so quickly!!!!!!!!
You get the best of both worlds with the Diablo Sport Predator. You get the fix so it doesn't hit the rev limiter in automatic on the 1-2 shift at WOT. AND it will hold the gear in stick mode even if you hit the rev limiter. Besides you get the tunes with the Predator (20-40 extra hp) and you can change your fans for a lower t-stat, and you can raise your shift points to 6400 (with a corresponding raised rev limiter) which makes a significant difference with the SRT8s, and logging, etc, etc. You want the TSB flash to fix the shift problem in automatic... it will get worse as the engine loosens up or if you're WOT going down hill like on an on-ramp. It can/will get worse than just a delay. It can get downright violent. You're pressed into the seat from the acceleration, it goes to shift and hits the rev limiter, you get thrown forward like you hit the brakes and then it completes the shift right at the same time it comes off the rev limiter and you get whiplash back into the seat again...
WHEW! so i did a good thing by doing the TSB!? now i can do the DSP and take off the auto shift at redline and its okay to raise the shift points on stock pistons/cams, etc? damn, when you say violent you arent kidding! :blush:
Yea, I don't know many who really regretted getting the TSB. It can be really annoying when you hit the problem. The only reason you really want to hold the gear at redline in stick mode is for doing burnouts. Yes, it's fine to raise the shift points. The Predator has an option for "raised shift points". They don't give you the option of picking how much. They raise them to 6400 and raise the rev limiter to 6550? Something like that... maybe it's 6300? On the stock engine you're risking floating a valve at about 6700. The engine is still making it's best power at about 6200 - 6300? Above the stock shift point anyway. This isn't true for the 5.7Ls by the way. They peak around 5500 and thats where the stock shift points are for them.
Yeah, since I never drive in stick mode and never do burnouts and was getting the violent shifting problem I went ahead with the TSB. But I can see how stick types would be annoyed with the nanny-shifting. And yes, Dave (Quick) is the expert on most everything around here. All bow to Dave!!
well dave, since your the expert on just about everyhing... what would you reccomend if i said i wanted to lower my car, but didnt want it to feel much different than stock? can the stock struts handle lowering springs? i want to lower it a little but, no slamming or riding on the frame, none of that donk or vdub shit with me! like the hotchkis springs from BMC performance? i was also thinking about doing a rear sway bar. yes or no? worth it? i think i mentioned this earlier, and if i have i apologize, but i have an 06 300c SRT8, i dont know if that makes a difference, i wouldnt assume so, but hey, why not mention it & be safe right? haha
If you want to drop it you should get coilovers. KWs, Teins, Mopar. KWs (either V1 or V2s) are the overwhelming popular choice. It will actually ride, handle, and feel better than stock. Most people go for about a 1" to 1.5" drop? You can not do lowering springs with your car. You have Nivomat self leveling shocks in the rear. Bed time for me... besides I only know a little bit about the basically stock car. The rest of these guys here know all about the fancy mods. Enjoy, you came to the right place.
thankyou very much! i hope we get to meet sometime at a meet or something, although not likely cause your in Cali and im in FL :crying: :crying: again, thankyou!
