dual fuel, 75k, was shuddering at 65kph on gentle uphills. Is now worse: does it on the flat, while cruising. Car is smooth as silk while accelerating, get to steady 60, and it shudders. Nasty. Same on gas or petrol. Goes away on downshift to 3rd (has 4speed auto).

Was serviced by MMA dealer a few weeks ago and had all new plugs and air filter. I mentioned the symptom to them then and it seemed to have gone away after their service but it's back now.

Also seemed to go away for a while after trans re-learn, so I'm thinking auto. I'll have trans serviced this week, by a different guy from the one who did it a yr ago and put in Castrol fluid. Will have it flushed and filled with genuine Mitsi.

What I'd really like is a "Mal" equivalent here in Adelaide: someone who knows and loves Magnas.

Thoughts anyone, on either the car or the person?

You need to go to some trans shops and get a tube of Shudder Stop, is a little red tube, you empty into the trans and usually takes about 100k for it to really work

I did a members AWD today, has had the issue really bad, he used the tube about 4 weeks ago and the shudder is 95% gone, we fitted a new trans filter today with cooler and added another tube of this just to be safe.

Have also added a tube to my wagon as it has the 5sp tippy in it now :cry:, as it had been sitting being moved in and out of the workshop for the last 11 months in the car it came out of, I think the fluid had gone off as I was getting a small shudder after about a week or so of driving, dropped the tube in and within I would say 10km, shudder was gone alltogether

The issue is generally the torque converter, this stuff makes it real easy to diagnose, if you spend about 24 bucks on a tube and it does not fix, is cheaper than replacing the torque converter to find was not the issue lol

On some cars - Commodores for example, when additives don't work and it's confirmed that it is a Torque Converter Clutch slippage problem and not ignition, the last resort is to cut or otherwise isolate the TCC solenoid so that the TCC no longer can operate - you get less fuel economy as the converter no longer can lock solid, but it puts off the day when you fork out big dollars for a reco trans.
You say: "Was serviced by MMA dealer a few weeks ago and had all new plugs and air filter. I mentioned the symptom to them then and it seemed to have gone away after their service but it's back now. "...that would suggest to me that the problem possibly is ignition or 'driveability' related, and not transmission related. Maybe you need to go back to them.
Good Luck.

[QUOTE=Madmagna;1379426]You need to go to some trans shops and get a tube of Shudder Stop, is a little red tube, you empty into the trans and usually takes about 100k for it to really work

do you know if Wynn's auto trans treatment works? they claim it stops shudders

You can try but I use the Dr Tranny Instant Shudder Fixx www.drtranny.com

dual fuel, 75k, was shuddering at 65kph on gentle uphills. Is now worse: does it on the flat, while cruising. Car is smooth as silk while accelerating, get to steady 60, and it shudders. Nasty. Same on gas or petrol. Goes away on downshift to 3rd (has 4speed auto).



I don't like the way the 4 speed continually shifts between 3 and 4th gears around 60 KPH, accelerate to 60 and it gets into 4th, slow down by a few km and it drops to 3rd. Can't be good for the gearbox. lol So I drive around town in third, put it in 4th when I can get up to 70-80 KPH. Try that.

Hi Madmax,

yes, I'm doing this at the moment to stop the problem. But it didn't do it until about a yr ago,it used to be smooth at 62-63 kph.

Try the tube stuff Madmagna recommended and let us know how you get on. Might help the rest of us when the problem surfaces.

will do

I've bought some Shudder-fix on Ebay (it's $6 in the US) but in the meantime I put in 250ml of the Nulon auto trans stuff, and after about 100km I would say the problem is 90% fixed.

have now done about 200km with the Nulon trans treament, and I now think the problem is 100% fixed. Fantastic. I was thinking "new trans" but instead this cost about $10.

Hope the problem stays away.

Thanks Mal, your advice (again) was great.