[Mach Stang]

Ok so when leaving a soccer game tonight, I began to notice something. Now let me just say that this only happened 2 times, but got me worried.

So whats going on is under normal acceleration, when the car (auto) sifts into 4th gear, there is a small vibration that feels like it comes from the back seat area. The vibration only last for like a half second. It feels almost like your going over those rumble strips on the side of highways, just with out the noise and a little more vibration to it.

Its really got me worried that its the tranny. The car has 109K miles and the fluid has been changed in the tranny at a 106K. Anyone have any ideas on this?

[mcqueen]

Check the bolts for the driveshaft/u-joints and the condition of them as well.

[Mach Stang]

ok thats a start. I'll have to do that late tomorrow though after work. But any ideas on exactly what im looking for or other suggestions to the problem.

[TheAntiricer]

my car had the very same vibration, i got scared thinking it was the driveline, but a week later tranny went out. sooo yea good chance it might be the tranny.

[Mach Stang]

oh god no. I dont have 3K for a tranny

[Rich J]

Junkyard might end up being your best friend if you can do the swap yourself. But just from what I have seen most of the time reverse goes out first. Did both the times it happen, happen after you changed the fluid?

[SlowSix]

if your tranny goes out you can do a t5 swap for cheaper than a rebuilt 4r70w.

[Mach Stang]

ok, just got out from under the car today. Checked the driveshaft and u-joints. all seem to check out a okay. I'll get some pics up in a minute. Took it for a drive after to try to replicate it at various RPM's.. also tried O/D at 60 on and off. Nothing.

on a side note I did find that my shocks are shot lol. Joy, lets replace those too.

[Mach Stang]

pic post

[TheAntiricer]

Originally Posted by Mach Stang oh god no. I dont have 3K for a tranny

lol a rebuild tranny should run you about 800$

[Mach Stang]

the last looked, it wasnt cheap. keep in mind business around here is different the Florida lol.

[Nito2v]

hope your car is fine:/ can't stand to see a fellow sixer down.

[Mach Stang]

well it drives, I'm just afraid of that day were it refuses to shift or I start spewing white smoke or something. Though If I'm really sneaky, I was looking at an 89 5.0 lately, maybe I could trade it before anything happens lol

[BlueScreaM]

Originally Posted by Mach Stang well it drives, I'm just afraid of that day were it refuses to shift or I start spewing white smoke or something. Though If I'm really sneaky, I was looking at an 89 5.0 lately, maybe I could trade it before anything happens lol

I have the same vibration at certain rpms been like that for a year or more. Might just be the exhaust

[Mach Stang]

humm idk. Although also today, we pulling out slowly from a parking lot, it felt like there was "pulling" going on. It felt like it took more, umph to the gas to get the car to move from like 2mph and up. And yes the car was warm then.

[TheAntiricer]

Originally Posted by Ahoboscheese I have the same vibration at certain rpms been like that for a year or more. Might just be the exhaust

you sure its the same kind of vibration? because i would be concerned. lol crap i was freaking out first time i felt it, i was thinking my driveline or tranny was gonna pop out in the freeway, its an intermittent vibration, feels like its coming from the rear, yet its strong enough for you to feel it in the front. lasts about 3-4 secs, theres no banging noise or any kind of noise, just shaking. kinda like a mini earthquake in the car.

[Mach Stang]

well mine lasted for only like a half second, and only happened when it shifted into 4th

[TheAntiricer]

Originally Posted by Mach Stang well mine lasted for only like a half second, and only happened when it shifted into 4th

yea only happens in o/d forgot to mention that. 3 to 4 secs on mine was when it was at its worst. it started just like you tho.

[BlueScreaM]

Originally Posted by TheAntiricer you sure its the same kind of vibration? because i would be concerned. lol crap i was freaking out first time i felt it, i was thinking my driveline or tranny was gonna pop out in the freeway, its an intermittent vibration, feels like its coming from the rear, yet its strong enough for you to feel it in the front. lasts about 3-4 secs, theres no banging noise or any kind of noise, just shaking. kinda like a mini earthquake in the car.

Yes its the same, I do have a like a bad humming noise coming from the back of the car and its shakes for 3 seconds until i tap the gas. Idk I had a few mechanics look underneath the car and they said everything was in great condition. I think its just the tranny acing up a little. Ford wasn't know for their autos.

[Mr. Red Pony]

Originally Posted by Mach Stang the last looked, it wasnt cheap. keep in mind business around here is different the Florida lol.

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