Jeep Garage  - Jeep Forum

Jeep Garage - Jeep Forum (
-   Engine Performance/Intake/Exhaust (
-   -   Advanced Transmission Programming SC? (

21076 03-22-2012 11:15 AM

Advanced Transmission Programming SC?
Who's running the advanced transmission tune with a superchips? I'm debating getting it but I've read it's kind of a hit and miss thing trying to dial it in. I'm running the 93 tune but get shuddering in 4th/overdrive on the highway. I had the dealer do the TSB update a long time ago which solved it but it's back with both 89 and 93 tunes. I assume I can dig into the torque converter settings in the advanced tune? I also feel like it shift too quickly into OD on the highway and the pedal sensitivity could be increased. Thoughts??

jeepgcoman 03-22-2012 07:51 PM

Re: Advanced Transmission Programming SC?
I've got both tuners and, as far as trans. tuning by the user goes, the SC is far superior, and gives you complete control over upshift/downshift and torque management. I am currently running the SC 91 tune, with my own trans. up/down shift and torque management schedule. As far as hit and miss goes, for me it's mostly a hit, but I do have (a long time ago) a little automatic transmission experience. I found that the best way to make adjustments is to drive it stock and make notes on what you perceive to be your "problem" areas. It's best to then graph them, especially if you're doing up and down at the same time. You may also want to graph the stock schedules to give you an idea what to look for when you modify. I haven't done that yet, as it takes about 15-20 minutes of continuous button pushing to load everything and the install. My first try was pretty close and just required a little minor tweaking. I am going to drive it this way for awhile and then make further adjustments, if needed. If anything it is now too sensitive, but it sure is a blast going around corners now....a slight touch and it downshifts to first and you're off like a shot. I still may also lower the torque management a little more, especially on the light throttle 2-3 shift. Also, if you desire, SC does have their "modest" schedules that are somewhat better than stock.

The DS tuner only gives the user control over the the first 3 gears. I haven't messed with it too much, as I am pretty happy with the SC at this point. If you have a modified WK, the DS is better overall, because it offers CMR tuning as well as user adjustable WOT fuel mixture, timing and shift points. It also allows you to adjust idle speed which the SC does not. I have a little grief with that since I installed a new cam in mine and need the idle speed up ~75-100 RPM.

21076 03-23-2012 10:45 AM

Re: Advanced Transmission Programming SC?
I feel like the torque management is too aggressive on stock. That's probably where I'll see the biggest change. But that'll hurt MPG's won't it?

jeepgcoman 03-23-2012 11:31 AM

Re: Advanced Transmission Programming SC?
Increasing torque management will make the shifts feel soggy or slippery. Lowering sharpens or firms them up. You'd also need to make a couple of your upshift points a little later to eliminate the problem you're not happy with. Yes, anytime you have more "slippage" your mileage may suffer slightly.

All times are GMT -5. The time now is 08:20 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community