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2008 Charger SRT8 - Autostick Modes Missing 5th
Posted: Thu Jun 02, 2011 9:57 am
by srt8-monster
U7135
Version 9r28
2008 Charger SRT8
I changed to Autostick Mode 1 last night and on my way to work this morning noticed that it only displays 1,2,3,4,D. I am going to change to mode 2 tonight. Does anyone know if it will add 5th gear?
I'm happy with it not auto up shifting though.
RE: 2008 Charger SRT8 - Autostick Modes Missing 5th
Posted: Thu Jun 02, 2011 10:36 am
by mikel
Sometimes a update fromt he dealer is needed to make that work.
RE: 2008 Charger SRT8 - Autostick Modes Missing 5th
Posted: Thu Jun 02, 2011 11:42 am
by srt8-monster
I could see 5th before I changed it to Mode 1. I don't think I need an update. I'll try Mode 2 tonight.
RE: 2008 Charger SRT8 - Autostick Modes Missing 5th
Posted: Mon Jun 06, 2011 9:56 am
by srt8-monster
What does the dealer need to update? I tried mode 2 &3 and they both auto-upshift.
RE: 2008 Charger SRT8 - Autostick Modes Missing 5th
Posted: Mon Jun 06, 2011 1:05 pm
by mikel
The TCM calibration.
Posted: Tue Jun 21, 2011 12:22 pm
by allen0579
srt-8 monster,
I'm in the same boat with my '08 SRT-8 Challenger....
I'm going to play around a bit more and check with the dealer if I can't disable auto-upshifting. I thought I recall reading in the Challenger owner's manual that the transmission will not automatically upshift when in autostick mode....I'll have to check on that.
Posted: Tue Jun 21, 2011 4:19 pm
by srt8-monster
My TCM version is from 2007 so I think that's the issue as Mike suggested. Let me know if you come up with anything.
thanks
Posted: Tue Jun 21, 2011 4:49 pm
by LJLAGUARDIA
What exactly does each "mode" do? Just got the Diablo for my 2007 SRT8....
Posted: Tue Jun 21, 2011 9:21 pm
by allen0579
I was under the impression that if you disable auto-upshift, the trans will not shift (no matter what) until you command it to with the autostick. Is this correct? Meaning you could hold first and bounce off the rev limiter?
srt8-monster,
modes 2 and 3 should allow you to select 5th gear. They did for me. The info below explains what mode 1 is doing (seems to act similar to the stock mode).
I was searching some other forums and I came across this thread (third post down):
http://www.lxforums.com/board/f325/auto ... ar-271311/
It explains the stock functions of the autostick compared to Diablo's. I pasted some of the post below.
Lets decribe how the Stock Auto Stick operation is different than the one provided by DiabloSport...
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STOCK (Chrysler) 1-2-3-4-D
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*The car upshifts freely untill it hits the "upper gear limit" set by the auto-stick.
When you go (-) from "D" while doing 30MPH you will enter autostick operation in "4". This does not mean you are IN 4th. It means the car will upshift freely until it gets to 4th and then will not shift into 5th...
In the Chrysler mode the Number represents the gear the car should not automatacally shift past... Not what gear the car is actually in.
If you hit (-) again you will be in 3. If in 3 you stop at a light the indicator will stay at 3. As you take off the car will shift 1>2>3 but not shift to 4th because you set at 3 as the limit.
If you are at 4 and hit (+) you will simply be saying "You can now shift freely 1-5" (which is the same as "D")... So you exit Auto Stick operation and enter into "D" (fully automatic operation).
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NO-UPSHIFT (DiabloSport) 1-2-3-4-5-D
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* The car will not upshift freely. You as a driver have to "Tell" the trans to upshift.
When you go (-) from "D" while doing 30MPH you will enter autostick operation probably in "3". It will enter into the gear the car currently is in at the moment.
If you hit (-) again (and your not going too fast) you will shift to 2nd and the engine will rev up, you WILL be in 2nd.
As you slow down the RPMs will drop and when they get low enough (~1000RPM) the car will downshft on it's own to avioid stalling. So if I were in 3 and I slowed the car to a stop, it will shift 3>2>1 on it's own. And the indicator will walk down with the gear shifts.
As I accelerate from the stop I'm in 1, and the car will NOT UPSHIFT on it's own... It will rev up untill I tell it to shift to 2nd, then 3rd, and so on... *That's what "No-Upshift" means...
*Post Edit1: "No-Upshift is true unless the driver pushes the car to the RPM set in the shift limiter... This would be ~5800RPM stock, or (6000-6500)RPM if adjusted by the the Predator. When the cars RPMs get to the shift limiter setting, the trans will shift up on it's own. But not before that limit. (Thanks to DaveDees and Dom for their proof read and this addition)
Because this behaivor is really the driver choosing what gear the car should be in (within allowable speed windows to maintain RPM), 5th becomes a valid choice in the autostick selection domain, and the car will provide you with 5 as a choice before hitting (+) and exiting autostick operation and going back to "D" (Fully Automatic shifting)
No matter if I have the stock tune or Diablo mode 2, 3 once I get close to redline, the trans shifts to the next gear. Reading through the link above, it appears there is a "shift limiter" for the TCM. If that is true, it doesn't appear that you can completely disable auto-upshifts.
Posted: Wed Jun 22, 2011 11:23 am
by srt8-monster
In mode 1 I was able to disable auto-upshift but only could see 1,2,3,4,D. In mode 2 it did not disable auto-upshift and sometimes prematurely shifted at 2500-3000 rpm 1st to 2nd so I tried mode 3. Mode 3 didn't disable auto-upshift and had mixed results and although the shifts were firmer I chose to revert back to stock mode 1,2,3,4,5,D with auto-upshift enabled.