"ciscokidinsf" (ciscokidinsf)
03/15/2016 at 13:26 • Filed to: Ask Oppo, Transmissions, ECU
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"ciscokidinsf" (ciscokidinsf)
03/15/2016 at 13:26 • Filed to: Ask Oppo, Transmissions, ECU | 2
| 31 |
From time immemorial (Meaning the early 90's) we have within our power to reprogram vehicles ECUs to give us better performance, remove limiters, add HP and torque that go beyond OEM specs, etc...
But I have never understood why we cannot do something similar with Auto Transmissions? E.g. imagine fixing the above, the horrid Chrysler 200 9-speed automatic, that everyone agrees can’t pick gears for shit, into something better?
Do Transmissions not use a combination of hardware/firmware/software that could perhaps be modified to work better? Millions of Nissan CVT’s need help too. And even some GM and Hyundai transmissions also need better adjustments - sometimes one tranny works well in one model but not in another. Educate me oppo, what’s the deal with non-adjustable-transmission software? Why can’t we hack something there?
For Sweden
> ciscokidinsf
03/15/2016 at 13:30 |
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We can’t?
Sweet Trav
> ciscokidinsf
03/15/2016 at 13:30 |
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http://www.hotrod.com/how-to/engine/…
This is already done on some vehicles. For instance, the Livernois tune for the Ford Taurus SHO firms up shifts and removes some of the torque management functions of the transmission. People have been tuning GM electronically controlled tranmissions for ages.
crowmolly
> ciscokidinsf
03/15/2016 at 13:30 |
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You absolutely can.
spanfucker retire bitch
> ciscokidinsf
03/15/2016 at 13:30 |
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But you can.
jariten1781
> ciscokidinsf
03/15/2016 at 13:32 |
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People make flashes/chips for transmissions...Diesel trucks and VW DSGs just off the top of my head.
WK2
> ciscokidinsf
03/15/2016 at 13:33 |
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AWE sells a software reprogram for the Audi S-Tronic transmission.
Link: http://www.awe-tuning.com/g-i-a-c-dl501-…
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ciscokidinsf
> crowmolly
03/15/2016 at 13:34 |
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Maybe I’ve spent too much time in the VAG world. I always see ECUs being offered but I’ve never seen an offer for ‘Transmission Tuning’ of the sort. And if we can do that, why wouldn’t then one buy the Chrysler 200 and then a ‘Tranny Chip Upgrade’ the same way you buy an A4 3.0T and you already know you want a stage 3 chip.
Saracen
> WK2
03/15/2016 at 13:36 |
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a lot of tuners sell TCU’s for VAG vehicles.
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ciscokidinsf
> ciscokidinsf
03/15/2016 at 13:37 |
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So going back to example, why then no one recommends, buy the awful Chrysler 200 and take it to have the transmission re-flashed with this software... and voila - better car!
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crowmolly
> ciscokidinsf
03/15/2016 at 13:39 |
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How big a market do you think there really is for a Chrysler 200 shift tune? The cars are there but the owners probably don’t give a shit, and even if they do they don’t want to risk burning something up from going aftermarket.
It’s also best done on a dyno or with real world testing. Mail order stuff is hit-or-miss, and you can miss big.
HydraulicDragon
> ciscokidinsf
03/15/2016 at 13:41 |
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In the VAG world they have been offering tunes for DSG transmissions for... at least 6 years?
TheMuffinMan834
> ciscokidinsf
03/15/2016 at 13:43 |
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As someone who codes for a living I’ve often had this thought (would love to get my hands on the shiftmap data for ZF’s 8 speed). Realistically there would be an easy to solution to the 9 speeds issues too... Essentially edit out lines of code that use the dog clutches in this transmission — they’re only used for two gears. Adjust the ratios accordingly so the gear after the dog clutch shift has a higher ratio — so you don’t feel as dramatic a loss of power from going 4-> 6 instead of the standard 4->Dogclutch 5->6 and you’d have a winner. Allow 9 (which is now gear 7) to engage sooner, but make 8th (6th) gear have a higher threshold before it shifts to it... And it should solve most of these shift issues. All this being a rough ideas.... But conceptually I think I’d be on the right path.
ESSSIX GmbH - Accountant/Wagon Thumper
> ciscokidinsf
03/15/2016 at 13:47 |
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On S4s you could have it hold gears, in stead of shifting when it wanted. It all comes down to what controlls are in place, and how much they can be varied, which is what tuning is about. You can only control what is controllable. Most transmissions dont have much to mess with on the ECU level, so you’ll mostly hear about changing the TC and stall speeds etc.
Smallbear wants a modern Syclone, local Maple Leafs spammer
> ciscokidinsf
03/15/2016 at 13:47 |
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You can.
Tripper
> ciscokidinsf
03/15/2016 at 13:49 |
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TCU tunes are available for most “dual-clutch” type of gearboxes. However most of the cars that come with those sorts of gearboxes are “performance oriented” cars to begin with.
I think its a safe bet that most drivers that would want to “tune” their cars, would stay far from a CVT in the first place.
Rico
> ciscokidinsf
03/15/2016 at 13:58 |
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Most ECU flashes also change the transmission mappings for better power delivery. It's just some cars are worth the R and D and many aren't because the market isn't big enough.
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jariten1781
> ciscokidinsf
03/15/2016 at 14:03 |
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People who tune tend to want to go 'good->better' not 'crap->ok'.
DoYouEvenShift
> ciscokidinsf
03/15/2016 at 14:10 |
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Some cars you can
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spanfucker retire bitch
> ciscokidinsf
03/15/2016 at 14:14 |
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But the VAG world is where a ton of TCU tuning takes place.
Just look at APR and the number of transmission tunes they offer for Audi and Volkswagen vehicles that use DCTs.
Liam Farrell
> ciscokidinsf
03/15/2016 at 14:14 |
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Try a Manual
Nick Has an Exocet
> ciscokidinsf
03/15/2016 at 14:17 |
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Dual clutch on Evo’s/Ralliarts can be programmed.
J_P_Cars10s
> ciscokidinsf
03/15/2016 at 14:30 |
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I’ve read about this being done on the 5 speed auto in 4th Gen 3.6R Outbacks.
John
> ciscokidinsf
03/15/2016 at 15:06 |
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You can, Im surprised you havent heard of it either because you said youre in the VAG world. Im driving a GLI and it can be tuned both for its ecu in the form of performance gaining mods and you can have a DSG tune to change your transmissions habits completely.
A DSG tune is actually next on my list of things I shouldnt buy but do.
AMGtech - now with more recalls!
> ciscokidinsf
03/15/2016 at 15:22 |
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People do this all the time... For more than a decade now...
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e36Jeff now drives a ZHP
> ciscokidinsf
03/15/2016 at 15:45 |
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Transmission tunes are absolutely a thing in the BMW world. I think Dinan offers them for all current cars
If only EssExTee could be so grossly incandescent
> ciscokidinsf
03/15/2016 at 16:16 |
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It can too be done. Murdersofa Jake had his Lesabre’s TCU reflashed. The post he made about it was a few years ago though so you’ll never find it.
The Powershift in Steve's '12 Ford Focus killed it's TCM (under warranty!)
> ciscokidinsf
03/15/2016 at 16:37 |
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I don’t know if this exists for the Focus’ Powershift, but it should.
Then again, most owners are more concerned about the Powershift destroying itself than performance, so that’s probably why the only tuners I know of are bundled with engine tunes.
PetarVN, GLI Guy, now with stupid power
> ciscokidinsf
03/15/2016 at 23:12 |
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uhhh you can tune a transmission? APR for example does DSG tunes, and so revo unitronic and the rest of them.... variable gear ratios are a different thing because you need to change the size of a cog to change actual gearing
TheD0k_2many toys 2little time
> ciscokidinsf
03/16/2016 at 02:55 |
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Its common in the diesel world when you buy programmers or custom tunes they add tranny tuning as well. mess with the pressures for shift points and such
Opposite Locksmith
> ciscokidinsf
03/16/2016 at 13:59 |
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People reprogram transmissions, especially in muscle car world and trucks both diesel and gas
Jake - Has Bad Luck So You Don't Have To
> ciscokidinsf
07/28/2016 at 21:19 |
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The Murdersofa has a tuned transmission. General Motors 4L65e, tuned to have a two-gear kickdown, firmer shifts for better trans longevity, more aggressive gear holding (instead of shifting to 2nd at 4000rpm at 80% throttle it waits ‘till 5000rpm, for example), less aggressive torque converter lockup, etc.