Got custom race tune SCT

[Big Mike 74]

I got a custom "race" tune from a place called lsxkilr tuning, I tuned the car using the sct tuning device, the shifts are a lot tighter now I know that these trannys aren't the best my question is the tighter shifting gonna take my tranny out faster than the softer shifts when it was stock? Thoughts anyone? Also the rpm's are higher on highway speeds just a touch i notice anyone else have a similar tune....I use the car as my daily and I have a 2013 SHO ALL TUNED out that I drive on weekends....I just don't want the reliability to go down on the car...I change the tranny FLUID every 20k and she's welded 100,000 miles thanks for ur help in advance.

 

[stephen newberg]

From what I have read, 'harder' shifts do cause faster wear in an automatic transmission. At least, that was the majority opinion over reading of it over a lot of time. How much more, I really have no idea. However WOT from stop seems, on these cars, to be the thing that does in the transmissions most. Mine might have a half dozen of these from the track on it since the car was new and has 200K+ on the clock with the original transmission still working just fine.

pax, smn

 

[Big Mike 74]

From what I have read, 'harder' shifts do cause faster wear in an automatic transmission. At least, that was the majority opinion over reading of it over a lot of time. How much more, I really have no idea. However WOT from stop seems, on these cars, to be the thing that does in the transmissions most. Mine might have a half dozen of these from the track on it since the car was new and has 200K+ on the clock with the original transmission still working just fine.

pax, smn

Thanks ...I mean the car isn't banging in and out of gear but the shifts are maybe I should have said "tighter" just more crisp....maybe I should take the tune off....mine is the original tranny as well

 

[stephen newberg]

Being of the cautious sort, if you are on the original transmission and it is still working well, I think I would not mess with it past the good things you are already doing, that is changing the transmission fluid regularly, and it is good to drop the pan and change the filter itself too every now and then. Eventually I am sure everyone needs to do a $3k transmission rebuild, but its a good chunk of change and I am all for holding it off as long as is practical.

pax, smn

 

[Gator417]

When auto trannies "ease" into gear, it means they are slipping the clutches to make the shift less noticeable. Some newer cars are almost undetectable. The firmer shifts are actually easier on the clutches and will allow them to last much longer. However, that shock will be transferred to the rest of the tranny bits, diff, and cv joints etc. Just a trade off you'll have to deal with.
As for the higher rpm on the highway, my guess is the race tune is not allowing the TC to lock up, so you're going to lose a little bit off the top on your mileage. Probably something which can be tuned back in to the mix, but I don't know much about that end of it. Hope this helps.
Gator

 

[stephen newberg]

Gator is right, its a trade off. Firm shifts help with clutch/band wear but hurt with most everything else in the transmission. If it was there only, it might be an even trade, but hard shifting gets to other parts in the drive train also, as Gator notes, such as the CV joints, etc. Overall, its a judgement call, but I suspect longer life span and lower costs are associated more with smooth shifts than hard ones. Not as much fun, though.

pax, smn

 

[gamefanatic]

It's a performance tune... That alone inspires harshness on the components.... Gator is correct that the firmer shifts will be better on the clutches. The sad thing is it is more likely that a solenoid is to go out before any of the other parts causing even more problems than the firmer shifts.