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Author Topic: AR-25 "Function" with Y26SE  (Read 5342 times)

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polilara

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AR-25 "Function" with Y26SE
« on: 15 May 2021, 14:44:54 »
No problems but just asking what's really happening; when driving with cruise normal speed here in Finland which is 80kmh = 50Mph I have fourth gear on and TC locked, engine is running 2000rpm. When starting to climb a hill engine rpm goes to 3400 first for a couple of seconds and then drops suddenly to 2800 and after a hill when back to "flatland" rpm drops again to 2000. If this 3400 is gear No. three why it changes first there. I face this phenomenon specially when towing my 950kg mobile home as usually normal hills are so low that nothing happens, 2.6 V6 is strong enough to go up with fourth gear and TC locked.
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Doctor Gollum

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Re: AR-25 "Function" with Y26SE
« Reply #1 on: 15 May 2021, 14:51:21 »
Sounds like it's dropping a gear to pull up the hill.

Normal behaviour if you're towing.  ;)
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polilara

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Re: AR-25 "Function" with Y26SE
« Reply #2 on: 15 May 2021, 15:02:52 »
Quote from: Doctor Gollum on 15 May 2021, 14:51:21
Sounds like it's dropping a gear to pull up the hill.

Normal behaviour if you're towing.  ;)

Sure, this is clear but why not just opening the TC lock as it seems to be enough. Third gear is there only some seconds and then back to fourth without TC locked.
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Doctor Gollum

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Re: AR-25 "Function" with Y26SE
« Reply #3 on: 15 May 2021, 15:44:43 »
Presumably that's down to how the ecu is programmed.

Also, road speed and engine load play their part in the process.
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polilara

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Re: AR-25 "Function" with Y26SE
« Reply #4 on: 15 May 2021, 17:06:04 »
Yes, if I designed the control system I would unlock TC first and shift down afterwards if needed, so step by step...
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VXL V6

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Re: AR-25 "Function" with Y26SE
« Reply #5 on: 15 May 2021, 17:28:32 »
Latest software on the autobox ECU can help with this but in my experience, 2.6's with AR25's do do some odd gear changes / clinging onto lower gears etc. When I changed the AR25 to an AR35 in my old 2.6 it transformed the driveability. 
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polilara

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Re: AR-25 "Function" with Y26SE
« Reply #6 on: 16 May 2021, 13:44:42 »
OK, nice to hear. I think odd gear changes, too.

Three AR35 available but far from here...

https://www.omegaowners.com/forum/index.php?topic=148256.0
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Shackeng

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Re: AR-25 "Function" with Y26SE
« Reply #7 on: 16 May 2021, 13:48:33 »
Quote from: polilara on 16 May 2021, 13:44:42
OK, nice to hear. I think odd gear changes, too.

Three AR35 available but far from here...

https://www.omegaowners.com/forum/index.php?topic=148256.0

Sadly all weighed in for scrap.  :(
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polilara

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Re: AR-25 "Function" with Y26SE
« Reply #8 on: 16 May 2021, 14:02:29 »
That's what I guessed, in Finland Omegas seen rarely, so good change to find scrapped ones here, too.
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cam.in.head

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Re: AR-25 "Function" with Y26SE
« Reply #9 on: 17 May 2021, 07:27:22 »
also cruise control tends to maintain the set speed as quickly as possible hence sudden gearchanges that you wouldnt normally get if you were driving without cruise on.
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polilara

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Re: AR-25 "Function" with Y26SE
« Reply #10 on: 18 May 2021, 18:09:28 »
OK, so I can go with my "reader" to gear box ecu and check which software version I have like VXL V6 mentioned. Hopefully someone knows which is the latest one.
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Andy H

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Re: AR-25 "Function" with Y26SE
« Reply #11 on: 18 May 2021, 22:22:16 »
Quote from: polilara on 18 May 2021, 18:09:28
OK, so I can go with my "reader" to gear box ecu and check which software version I have like VXL V6 mentioned. Hopefully someone knows which is the latest one.
TB knows :y
My 2003 2.6 behaved in exactly the same way - 50mph/80kph is right on the point where the change occurs so it is constantly swapping up & down. I found using sport mode less irritating because the change occurred sooner.

TB checked my gearbox software version and confirmed that I had the 'final' version :-(
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polilara

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Re: AR-25 "Function" with Y26SE
« Reply #12 on: 24 June 2022, 12:12:26 »
Quote from: Andy H on 18 May 2021, 22:22:16
Quote from: polilara on 18 May 2021, 18:09:28
OK, so I can go with my "reader" to gear box ecu and check which software version I have like VXL V6 mentioned. Hopefully someone knows which is the latest one.
TB knows :y
My 2003 2.6 behaved in exactly the same way - 50mph/80kph is right on the point where the change occurs so it is constantly swapping up & down. I found using sport mode less irritating because the change occurred sooner.

TB checked my gearbox software version and confirmed that I had the 'final' version :-(




Old thread but now remembered to take these photos from my 'modern' X40 XP screen, do I have the latest Soft Ware version?
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TheBoy

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Re: AR-25 "Function" with Y26SE
« Reply #13 on: 24 June 2022, 12:57:38 »
V8 is the latest for 2.6/3.2

Sadly this lacks a lot of the refinements that the 2.5/3.0 got with the V9, and the 2.5/3.0 versions are incompatible with the 2.6/3.2
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polilara

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Re: AR-25 "Function" with Y26SE
« Reply #14 on: 24 June 2022, 13:13:28 »
Thanks for info, then I live with this.
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