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AW 55-50 Transmission Glad to help!

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Old Nov 10th, 2019, 17:40   #391
barrybritcher
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WELL THE XC IS AWD so will be worse on fuel economy due to drivetrain losses
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Old Nov 10th, 2019, 20:48   #392
FORTYVALVE
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Default 2004 XC gearbox: reluctant shift

THANK YOU very much, Georgandkira, for your encouragement in that direction. Now I just need to find out which gearbox I have which should not be too hard. Cheers!
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Old Nov 10th, 2019, 20:54   #393
FORTYVALVE
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Thanks, Barrybritcher. I'm looking forward to a whole lot more miles per gallon than with the Landcruiser D4D! The XC70 will do the reduced towing duties that I now need very well I think. Cheers!
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Old Jan 15th, 2020, 22:19   #394
JohnPud
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Default Similar high revs

Quote:
Originally Posted by FORTYVALVE View Post
Yesterday picked up this December 2004 XC70 with 49K on the clock, full Volvo history, immaculate. D5 SE Lux, (I think 165hp). I'm told it was just into the "facelift" model of that year. I'm used to the auto box in a 2003 Landcruiser (which I'll be selling now.) . Driven carefully the LC will pootle around at not excessive revs. The XC70 seems high revving (over 2000rpm at 60mph on the level) and frequently sounds as if it needs to shift up a gear eg doing over 2000rpm for a while at 50mph before eventually changing up, or not bothering. Lucky for me, the action is smooth so its hard to feel the shifts, I'm just watching the revs. I'm not sure what gear I'm in. Is this how it is with these cars? I can't help feeling that it will be very thirsty operating the way it is. As Baloo said about the bees, it just feels like it's working too hard!
Thanks to PeteB1's great post on flushing the box repeatedly, and others, should I be doing this as well, as 49K assuming the same old oil seems a bit of a stretch and I've heard that Landcruisers also really benefit from the treatment. The box is smooth. Maybe i just need to get used to it?!
Very many thanks for heaps of great posts on here!
I have a similar problem with my 2003 XC70. As I drive along lanes with small inclines up and down the revs are around 2000 all the time. If they are lower I can blip the throttle with no speed increase. I did a test a while back on a long uphill stretch and maintained 2000rpm while the speed steadily increased from 50kph to 90kph. On the motorway it is the same until I reach 100kph, then it appears to act normally - revs at that speed are of course above 2000. My first XC70 was the same year but petrol, and I still have my beautiful 2009 205 bhp XC70 in the UK (I'm in Portugal - it would have cost me €19,000 to register it :-( ) and neither of those drive like this one. But the local mechanic and a Volvo dealer both insist there is no problem! Unfortunately, autos are not very popular over here so specialists are hard to find. Does anybody have an idea of the problem?
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Old Jan 19th, 2020, 12:11   #395
MisterGee19
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In normal use with a healthy gearbox, should the gearchanges at light throttle and low speeds be completely imperceptible without looking at the rev counter?

My gearbox gives little noticeable "kicks" when changing in lower gears during normal driving not sure if thats normal or not.

I know my gearbox can get a bit fussy when the fluid is very hot , normally around 3-2 2-3 changes hesitating then banging into gear, but under my usage, its quite rare.

Ive done the first of several sump-dumps which has improved things slightly with several more to go in the future.. I didnt reset the fluid counter or anything in vida.
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Old Jan 19th, 2020, 14:20   #396
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To Gee19: How dirty was the fluid? I assume fairly dirty as you sound accepting of "more to go in the future".
Your transmission will thank you....seems it already has.

I suggest adding LubeGard (red bottle) at the recommended dose (1 oz. per system quart) once the fluid is acceptably clean.

I do not believe in "mechanics in a can" however, the LubeGard line is used by pros.
10 years ago a TCM download improved the shifting in my 2002 V70.
After that I read about LubeGard on the oil fora website and tried it.
The additional improvement was amazing.

DISCLAIMER: I have no £-$-€ interest in what you buy/do.
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Old Aug 9th, 2020, 21:30   #397
777dave
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Hi my transmission service message came on so I changed the fluid but I got a code001f which is vehicle speed sensor so I replaced it with another one reset the codes drove about 1 mile and it came back transmission service message plugged in vida and two messages one tcm say no communication and ecm says no communication with tcm please can you help me
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Old Aug 9th, 2020, 21:33   #398
luggsey
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Quote:
Originally Posted by 777dave View Post
Hi my transmission service message came on so I changed the fluid but I got a code001f which is vehicle speed sensor so I replaced it with another one reset the codes drove about 1 mile and it came back transmission service message plugged in vida and two messages one tcm say no communication and ecm says no communication with tcm please can you help me
I remember reading a couple of threads that mentioned damage to the wiring leading to the gearbox?
Maybe worth a check first.
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Old Dec 12th, 2020, 11:10   #399
eric19371
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Default Slipping Lock-Up Issue (AW55-50/V50 2.4i)

Good day to you all. I am having an issue with the AW55-50 geartronic gearbox fitted into my '04 2.4i V50 (> 130k miles) and after reading through the majority of the past 40 pages of posts in this thread I am hoping that one of you may know of a solution to my problem.

FYI: I have already had a thread on this issue in the S40/V50 forum HERE.

I acquired the car in March '19 and in November '19 I noticed an issue with it where the RPM was fluctuating at low revs. I did some research and the symptoms I am seeing match the conditions under 'Volvo Shift Modes: Locking Slip-up' but they are greatly exaggerated with the RPM fluctuation sometimes being around 300-400RPM. The occurrence is varied, it probably occurs 75% of the the times the conditions are met but when it starts to happen it is almost continual. When it occurs you can feel a change in performance, going from smooth to sluggish as the RPM fluctuates.

The Sonnax site describes the feature as follows:

https://www.sonnax.com/tech_resource...urers-part-one

Slipping Lock-up – Slipping lock-up mode allows for a smoother lock-up engagement while reducing vibration and noise. The computer maintains a 50 to 200 RPM torque converter clutch slip in this mode. The following conditions must be met for this mode to activate:

Gear shifter must be in the D, 4, or 3 position.
Transmission must be in 3rd, 4th, or 5th gear.
The transmission input speed must be 1100 RPM or higher and the throttle opening must be 35% or less.
Engine coolant must reach a certain temperature.
Transmission oil temperature must be at least 40°C (104°F), but not to exceed 120°C (248°F).


When I purchased the car, nearly two years ago it had a full main dealer service history but I could find no record of an ATF change so in April this year I took it to a local garage for a ATF change. I understand this was simply a change, not a flush. This did not resolve the issue although it did appear better for a little while.

When the conditions of the slipping lock-up feature are not met, which is generally when it goes above 2k RPM, the gearbox appears to be otherwise smooth and the engine gives strong performance with no indication of slipping from the gearbox. On a cold morning just after starting you can feel the first few changes but as soon as the temperature gauge starts to rise this goes away.

I am wondering if it simply needs a full ATF flush and a software update?
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Old Jun 14th, 2021, 23:39   #400
Maverick87
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Question Volvo S60 d5 automatic problem

I own a Volvo s60 2002 year, D5 motor automatic. Ever since I bought it last year I have had a problem. When I drive it in the city or on the terrain where it sometimes asks for a frequent gear change, the gearbox starts to jerk on 1-2 and 2-3 gears, somehow enters that bad algorithm and remembers it and continues to change it like that, until I turn off the car on 10-15 min, after that it works without problems. It also stops twitching when I press W (winter) mode on the gearbox, but when I return to D it twitches again until it sits off for 10-15 minutes. So in W mode it changes without any problems. I've got answer from someone: In the W mode the gearbox is skipping the 1st and 2nd gears so it stays in 3rd or higher - it is not recommended to leave in W as it may cause quick transmission wear. The fact it works fine after restarting may look like something electrical. Thanks in advance
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