XJ XJ8 / XJR ( X308 ) 1997 - 2003

Is there a way to change what rpm shifts happen at?

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Old 04-25-2013, 01:27 PM
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Default Is there a way to change what rpm shifts happen at?

My 2002 XKR shifts at 5400-5500 from 1st to 2nd at full throttle in drive. Is there an easy way to make it shift at closer to 6000?

my 2nd to 3rd is closer to 6000.

All stock trans.
 
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Old 04-25-2013, 01:42 PM
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The shift points are determined by the gearbox ECU & the only way to alter them is to have the gearbox ECU re-programmed with a new map for the shift points...
 
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Old 04-25-2013, 01:45 PM
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Run 722.6 adaptation procedure:
http://www.w203.pl/download.php?id=1...5ee68da06bc348

Actually the following is easy way to reset:

- Turn key to ignition (don't turn engine on)
- Press the pedal all the way down for 15 seconds
- Turn key to off (leave key in)
- Release pedal
- Wait for at least 2 minutes
 

Last edited by XJR-99; 04-25-2013 at 01:48 PM.
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Old 04-25-2013, 01:50 PM
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Originally Posted by XJR-99
Run 722.6 adaptation procedure:
http://www.w203.pl/download.php?id=1...5ee68da06bc348

Actually the following is easy way to reset:

- Turn key to ignition (don't turn engine on)
- Press the pedal all the way down for 15 seconds
- Turn key to off (leave key in)
- Release pedal
- Wait for at least 2 minutes


This link does not work.

What will the reset set it to?
 
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Old 04-25-2013, 02:03 PM
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That link works for me...

You can reset TCU and teach it to shift higher. I have done the reset a few times.
 
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Old 04-25-2013, 02:05 PM
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the link does not work on my computer or my smartphone. how do you teach the computer a new trick after trying the procedure of listed above?
 
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Old 04-25-2013, 02:18 PM
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How about this link:
http://www.europeantransmissions.com...6_adaption.pdf

When I made reset first time I noticed higher shift points also with WOT ( from ~5700 to 6000 ) and car was somehow more aggressive.
 
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Old 04-25-2013, 02:26 PM
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Originally Posted by XJR-99
How about this link:
http://www.europeantransmissions.com...6_adaption.pdf

When I made reset first time I noticed higher shift points also with WOT ( from ~5700 to 6000 ) and car was somehow more aggressive.
That link worked.

Question, it is saying to accelerate, not exceeding 24oo rpm 4x 1-2 shift, then 4x 2-3 shift, then 3x 3-4, then 3x 4-5 ? Is this to be done by starting from a stop for the 1-2 shifts 4 times, then rolling 2-3,2-3,2-3,2-3, and so on? Then letting the car idle for 10 minutes.

Am I getting this correct?
And the rate of acceleration is not important, just not exceeding 2400 rpm, correct?
 
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Old 04-25-2013, 02:33 PM
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Originally Posted by WaterDragon
That link worked.

Question, it is saying to accelerate, not exceeding 24oo rpm 4x 1-2 shift, then 4x 2-3 shift, then 3x 3-4, then 3x 4-5 ? Is this to be done by starting from a stop for the 1-2 shifts 4 times, then rolling 2-3,2-3,2-3,2-3, and so on? Then letting the car idle for 10 minutes.

Am I getting this correct?
And the rate of acceleration is not important, just not exceeding 2400 rpm, correct?
1-2 shift was not easy to make that way since it use to shift before 2400rpm. Others are easy ones.
 
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Old 04-25-2013, 02:37 PM
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I see now it appears to say the lower rpm shifts during the reset procedure (Max 1800rpm) may result in higher torque numbers.
 

Last edited by WaterDragon; 04-25-2013 at 04:54 PM.
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Old 04-25-2013, 04:52 PM
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I tried the reset procedure. I kept the rpms less than 1800.

My 1st -> 2nd gear full throttle shifts now "may" be 5600, so, a gain of +100 rpm only.

Somehow the car feels a little stronger, even after repeated hard runs.
 

Last edited by WaterDragon; 04-25-2013 at 05:24 PM.
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Old 04-25-2013, 05:20 PM
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Tried it again, this time it took.
1st -> 2nd 4x kept below 1600 rpm
2nd ->3rd 4x kept below 1600 rpm
let car idle for 11 minutes

Now 1st -> 2nd shifting at just below 6000 rpm! definitely adding to the fun factor

This may sound strange but the car is getting to the point where I don't think it "needs" to be much faster....

but that NOS bottle in my garage whispers to me when I walk by
 

Last edited by WaterDragon; 04-25-2013 at 10:00 PM.
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Old 04-26-2013, 01:26 AM
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Originally Posted by WaterDragon
Tried it again, this time it took.
1st -> 2nd 4x kept below 1600 rpm
2nd ->3rd 4x kept below 1600 rpm
let car idle for 11 minutes

Now 1st -> 2nd shifting at just below 6000 rpm! definitely adding to the fun factor

This may sound strange but the car is getting to the point where I don't think it "needs" to be much faster....

but that NOS bottle in my garage whispers to me when I walk by
....and when you want even a bit more, go for blue tops.
 
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Old 04-27-2013, 06:20 AM
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why would anybody want to dog a nice car. i have mine to take nice easy drives. when i want to get down i have a 1955 chevy 2 dr all steel body, street legal ( turn signals ,wipers,headlights, not stock exhaust) that i go to the strip and run. last time 186 mph 8.3 sec in quarter. 688 ci, 2 4's dual stage noz.
 
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Old 04-27-2013, 06:40 AM
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The point of my post was how to get my 1st to 2nd shifts back to 6000ish rpm.

What is your point?

Are you suggesting we should all install throttle stops at 50% throttle?

should our street cars should all shift at 3000 rpm?

When I want a calm idyllic ride I drive it that way, and it behaves like a docile kitten, but when I punch it, I want it to shift at 6000 rpm, not 5400, this is not making the car less elegant.

Explain your post
 

Last edited by WaterDragon; 04-27-2013 at 05:22 PM. Reason: pulled my head out of my ***
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Old 04-27-2013, 02:25 PM
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@ WaterDragon - cool ya jets dude I understood it as an agreement to your " I don't think it "needs" to be much faster" from his example is the 186/8.3 when he want's to really go fast? No?

Anyway, nice to see the advice on adaptation given and your results, I'd look into the bluetop solenoids as 99 suggested, you know they're an AMG/Maybach update with much higher flow rate, changes are tuned as you've just done, Andre' posted a great thread about dialing them in. Good fun
 

Last edited by Sean B; 04-27-2013 at 03:45 PM.
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Old 04-27-2013, 02:28 PM
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Oh,...

I completely missed his point then, I thought he was speaking to the shifting rpm point. It seemed like a very weird point to take issue with. Now it makes sense.

I that case, I take back my statement and admit my incorrect assumption
 
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Old 04-28-2013, 10:44 AM
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Originally Posted by jaguar jon02
why would anybody want to dog a nice car. i have mine to take nice easy drives. when i want to get down i have a 1955 chevy 2 dr all steel body, street legal ( turn signals ,wipers,headlights, not stock exhaust) that i go to the strip and run. last time 186 mph 8.3 sec in quarter. 688 ci, 2 4's dual stage noz.
British car can also be fast and luxury at the same time, like this local everyday one: http://www.pjp.fi/osatorikuvat/425.jpg
http://www.pjp.fi/osatorikuvat/420.jpg http://www.pjp.fi/osatorikuvat/416.jpg
 

Last edited by XJR-99; 04-28-2013 at 10:50 AM.
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Old 04-28-2013, 02:16 PM
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Originally Posted by XJR-99
British car can also be fast and luxury at the same time, like this local everyday one: http://www.pjp.fi/osatorikuvat/425.jpg
http://www.pjp.fi/osatorikuvat/420.jpg http://www.pjp.fi/osatorikuvat/416.jpg
It is almost complete, it is missing this
 
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