Noisy Mazda Miata Transmission

mazda
noises
miata
transmissions

#1

I have a 2009 Mazda Miata w 6-sp manual transmission and 3000 miles. After the tranmission oil gets hot – about 20 fwy miles – the car develops a gear lash noise when accelerating in any gear from 2000-3000 rpm – like wooden balls in a barrel. Noise has been reported on Mazda web sites. Is this acceptable, or should I insist on transmission replacement?


#2
How much warranty does it have remaining?  Have you had it to the dealer?  If so what did they say?

Have you checked the transmission fluid?

#3

Car now has 4000 miles; power train warranty runs to 60,000/6 years, extended warranty to 100,000/10 years. 4 visits to dealers. First dealer finally declared, “Normal.” Second dealer declared, “Abnormal”; Mazda District Service Manager said to change transmission oil, which they did (2 full changes in one day). Last e-mail from Mazda USA said “normal,” but I’ve never had a car (out of 25, mostly manual sports cars) exhibit such a noise.

When I first heard it, I thought the noise was pre-ignition, so bad, that I was reluctant to drive the car at all.

I’m building a case for CA lemon law, but I don’t know yet if the noise is a precursor to a serious problem.

Roger Bohl

Quotes from the Internet (see, especially, the last!):

7/27/08 That’s the same sound I was complaining about, after some reading on this forum I have given up complaining about it as it seems “normal” for the 6MT. My '99 had some weird noises and it never broke so I guess this is the same deal.

7/26/08: OK, I read the “I bought a Diesel” thread but there seems to be several noises described there that occur under different circumstances. Here’s what I’ve got: New 08 PRHT, 600 miles, 6M, Susp… Pkg. No strange noise when motor is cold. When warmed up, I get a rattling noise (like marbles in a plastic bottle) from under the car from the vicinity of the transmission when accelerating from low speed in 2nd gear. I hear the noise when the car is warm whether the AC is on or not. I don’t notice it in neutral or any other time for that matter.

Does this sound like Gear Rollover noise? From what I could gather from the other thread there is no fix for this. Is that true?

7/26/08: That’s the noise that everyone’s been talking about in the “diesel” thread. I’ve got it too - very annoying, I must say.

7/26/08: According to Mazda customer representative that came out to look at our car with the same sound, they said it was “normal”. I told them it was only “normal” if it was a design flaw. Normal manual speed transmissions do not make this sound. I also don’t remember the sales person talking about this sound during the sales pitch.


#4

“Is this acceptable?”

NO.

Transmissions, manual or automatic, should not make strange noises.

Keep complaining.