Thread: Auto transmission problems, I think!

Originally Posted by Ticka

Yet again, I'm seeking help from the gurus...

Yesterday my better half made me aware of a possible problem with the Disco. She said that she was at a set of lights, and for reasons which I cannot fathom, put her foot flat to the floor.

The Disco took off with it's usual alacrity, but as it reached approximately 3 to 4 thousand revs, it started to jump as though trying to change up a gear, but not being able to get there.

She described it as "bunny hopping like a learner", which is what I found when I tested it out. It seemed like it was trying to change up, and clutching itself, but getting knocked back.

The transmission is otherwise as smooth as a button.

What I want to know is: what are the most likely problems?
I'm sure I've read that someone else had a similar problem before, but I've trawled the sight and I can't anything similar.

It's done 98, 000kms, so due for a major service which now I think I might do this week.

As always, I'll be very grateful for any and all help anyone can offer.

What model Disco2?
V8 or Diesel?

JC

Sounds like the MAF ,mine did it.It is actually the engine surging that causes the auto to go crazy.

It seems to happen at high revs only...

It's a November '03 Td5.

I had a look at the MAF and it seems to be quite dusty in there, which is extremely frustrating seeing as though I've done just about everything possible to seal the air filter!

Is there any way to confirm that that's what it is? Does it require a Nonacom?

Cheers for the help.

It could be MAF related, it is probably worth cleaning the MAF with a good electrical cleaner (pressure pack).

It could also be the boost modulator for the turbo. They are easy to replace and relatively cheap.

After some direction from the learned members of AULRO, combined with some diligent research, I think I have identified the problem.

I have unplugged the MAF and all appears to be sweet again. So I'll order a new one today and hopefully that will be the end of it.

I apologize to all the purists for posting on a subject that already has a gazillion threads, but I needed the direction to be able to identify the problem. I didn't even know what a wastegate actuator or MAF sensor did beforehand.

And I thank everyone who helped, allowing me to gain a little more knowledge so that one day, hopefully, I will be able to answer questions for others.

Finally, quick question: what are the risks of leaving the MAF unplugged while I wait for a replacement?