miataspeed1point6

iTrader: (1)

I was doing 55mph in 4th gear, and I gave it some gas to get moving and my shifter started moving side to side in my hand. On the streets I tried the same thing and if I am in low revs and give it gas in 3rd, 4th and 5th the shifter moves side to side on it's own.

The car has 63,400 on it and I am assuming the same clutch it had when it left the factory. I'm running 5psi and have been for about 3 summers. I'm guessing the clutch is toast or the flywheel is warped. While I was giving it gas in the low revs it also felt like the car missed, but watching the tach it didn't move. Could that be the clutch slipping? I'm assuming it slips which lets the shifter slide over, then grips which pushes it back. The slip feeling has been around for a few weeks, the rocking shifter just started today.

BenR

iTrader: (2)

Sounds like motor mounts.

rappadan

iTrader: (2)

motor mounts or diff mounts. Buy new ones from mmr-direct.com

paul

iTrader: (21)

get the mazdaspeed ones, they are cheaper than OEM and 40% stiffer

miataspeed1point6

iTrader: (1)

I forgot one important part, it isn't like I hit the gas and then it moves, let off and it moves back. When I hit the gas it shakes back and forth until I either go aboke 4k or I clutch in.

Last time I checked my mounts were in good shape, but I suppose I should take another look.

bryantaylor

iTrader: (5)

thats just the soft stock motormounts. the MMR mounts have NO movement

spike

Do you have any experience with MMR mounts? If not,then I suggest you do not reccomend those mounts to anyone who daily drive their car.

Zabac

iTrader: (39)

i have the same thing going on, moves under power...maybe it is time for new mounts...damn

Joe Perez

iTrader: (8)

MazdaComp, not MazdaSpeed. MSM's had the same motormounts as everyone else.

I have a set of the MazdaComp mounts in my car, and they're actually not bad at all. There is some increase in vibration at idle, but apart from that nothing noticeable.

Braineack

iTrader: (62)

haha, thats because he pretty much drives a race car as a DD.

paul

iTrader: (21)

i stand corrected. i did buy them from MazdaComp.

hustler

iTrader: (6)

so the mmr mounts are brutal? lol, this should be fun.

Doppelgänger

iTrader: (12)

I have the mazdacomp motor mounts. Not that bad for me either. Though i also have a 4-puck ACT clutch.

Funny thing, my shifter was 'torque-ing' over to the side...... then i discovered i had broken my PPF lol

MX_Eva

As well as mounts there is a chassis frame brace that also attaches to the transmission to try to steddy it and make it not move around.

Joe Perez

iTrader: (8)

Yeah, now *that* is a hardcore solution.

miataspeed1point6

iTrader: (1)

Well I haven't had a chance to check the mounts, hopefully I can tommorow. I haven't been able to make the car do it again. It was really obvious when it did, so I dunno.

jayc72

iTrader: (14)

Unless there is something really wrong with the motor mounts I don't see how they would be causing the engine to rock back and forth under constant acceleration.

Post a video of what you are talking about, I'd like to see the kind of movement.

Motor mounts are probably in order, but I wouldn't say it is a slam dunk fix for your problem.

spike

It will fix the problem.

I helped a friend install a set of MS motormounts cause his engine rocked so badly you could push the engine from side to side with just light pressure.

We installed the mounts and the problem was cured.

Fergus

Yes, it is the motor mounts.

miataspeed1point6

iTrader: (1)

Well I pushed the engine side to side and looked down at the mounts. I didn't see any movement and it didn't feel like they let the engine move very much.

I'm sure they could use replacing, but I don't think they are my problem. I'd video what the shifter did, but I can't make it do it again.

I'm not going to bother with it now, the car is going up for the winter soon. I'm going to be changing the clutch and flywheel to 1.8 parts anyway. I suppose changing the engine mounts should go on the list.