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#2446367 - 02/04/18 02:48 PM OH SO SLIGHT SHUDDER 07 CARAVAN
Magnumguy Offline
master

Registered: 01/19/03
Posts: 9874
Loc: S.E.Ohio
3.8 automatic (of course). Under light acceleration or cruise it seems to have a slight harmonic shake or vibration(slight shake, goes away for a couple seconds, slight shake, repeats), if I accelerate slightly more or let off the gas, it'll go away. No issue with OD or going into lockup, actually seems to occur before lockup. Under heavier acceleration it doesn't occur.

Changed filter and fluid and it's a little more prevalent that before.

Is there an additive that might stop this? It's not severe at all, wife (who's primary driver) doesn't even acknowledge it. And it's not horribly bad, just noticeable to this car guy.

Thanks


Edited by Magnumguy (02/04/18 02:49 PM)
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#2446389 - 02/04/18 03:27 PM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
451Mopar Offline
master

Registered: 05/19/08
Posts: 4978
Loc: Aurora, Colorado
If it is the transmission, you need yo use the 7176 spec ATF+3 or ATF+4 trans fluid.

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#2446413 - 02/04/18 04:06 PM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
Magnumguy Offline
master

Registered: 01/19/03
Posts: 9874
Loc: S.E.Ohio
Not certain, but pretty sure they did.
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#2446449 - 02/04/18 05:02 PM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
Transman Offline
super stock

Registered: 03/27/11
Posts: 774
Loc: Michigan
If you are in high gear (4th with the 41TE or 6th with the 62TE) and driving steady state and you get this condition you likely have something besides the trans causing it.

You say the condition comes and goes with steady throttle? On smooth road and steady state the trans is locked.

Watch the tach when you get the condition to make sure it doesn't fluctuate.

I don't think we had them in 07 but you don't have AWD do you?


Edited by Transman (02/04/18 05:03 PM)

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#2446700 - 02/05/18 01:06 AM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
mod381 Offline
enthusiast

Registered: 02/26/09
Posts: 321
Loc: wisconsin
2007 had problems with torque converter shudder. Converter shudder is most noticeable around 30-40 and 60-70. There is a tsb for it. If it is converter shudder you can put a bottle of the mopar limited slip additive for rear axles in the trans and it should make it go away. The tsb is to update the pcm and replace the converter.

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#2447061 - 02/05/18 06:10 PM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
Magnumguy Offline
master

Registered: 01/19/03
Posts: 9874
Loc: S.E.Ohio
Quote:
Watch the tach when you get the condition to make sure it doesn't fluctuate.
Maybe just a needles' width on the tach when it does.

I'll give the LS additive a try.

Thanks as always gang!
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#2447334 - 02/06/18 09:39 AM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
moparx Offline
Dreaming of implants

Registered: 09/03/03
Posts: 8967
Loc: north of coder
my local trans guy said something about using the limited slip additive one time, but i wasn't really paying attention [what is new about that ? biggrin], so i can't remember. i'll have to call him.
beer

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#2447360 - 02/06/18 10:35 AM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
dvw Offline
master

Registered: 03/16/06
Posts: 7048
Loc: MI, usa
Could be engine miss as well. Ive had spark plugs with cracked ceramic do this. Only on slight accell.
Doug

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#2447534 - 02/06/18 03:48 PM Re: OH SO SLIGHT SHUDDER 07 CARAVAN [Re: Magnumguy]
Transman Offline
super stock

Registered: 03/27/11
Posts: 774
Loc: Michigan
The limited slip additive works - because it makes the trans SLIP. But only if your problem is clutch shudder.

Plus it damages any brass materials - bushings and thrust washers.

And it reduces clutch capacity ( makes the clutch less able to carry the same load ).

If you haul a small trailer and back that van up a grade you'll wound the L/R clutch - guaranteed.

Before you use it - why don't you diagnose the problem more instead of crutching the situation.


Edited by Transman (02/06/18 03:49 PM)

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