2004 Ford Mustang tranny jerks

2004-MUSTY

MEMBER
2004 FORD MUSTANG
6 CYL
2WD
AUTOMATIC
55,000 MILES

Hey,

I got a 04 3.9 v6 with 55k miles on it. And I put roughly 15k of those miles on it. And ever since I got it I've noticed some "rough shifting" which involves 2nd, 3rd, and 4th gear. Most of the time, whenever they shift up around 3,000 to 4,000 rpms I get a jerk out of them. I dont hear any clunking or grinding, I only ever get the rough jerk that even the passenger can notice.

Also, the tranny fluid was changed by the ford garage when I first got it.

Could this be due to after-market clutches?

3 Replies

2CARPRO JACK

MECHANIC
11,533 POSTS

So this is something it has always done? Does it shift soft at lower rpm's? Does it shift hard if you slowly accelerate or is it a harder on the gas thing?

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Monday, January 7th, 2008 AT 7:37 AM

2004-MUSTY

MEMBER
2 POSTS

Yes, ever since I got it I've noticed this. Whenever the ford garage changed the fluid and ran the car 15k miles ago they said it shifted fine when I asked them.
If I accelerate slowly I wont notice anything, but if I accelerate fast then I do notice the "slight jerk feeling".
But its never with 1st gear, I sure its only second and third gear, (poss. 4th) around higher rpms (usually aorund 2,500-4,000.) But the weird thing is, is that once in a while it wont do it.

I will notice this when the tranny is hot or cold.

I have drove an F-150 where as I dont notice this no matter what RPMs it shifts at.

I hope this is clearer