95 3800 shudder in right turn

95 3800 shudders in right turns only not straight not left turns . Just in right turns at lower spped under slight load. Just had the right trans axle replaced ( 3 days ago ) . I thought it was possibly wires and plugs . But it only seems to present in right turns. Straight and right no probs. Van was always a gas hog but no such shuddering b4 transaxle change. Heading to Nova Scotia on Friday with the kids any insite( b4 i go back to the shop for them to fiddle with it) is appreciated.

.....it depends what you describe as "shudder"....: to me it is a rather low toned vibration that has no specific or continuous frequency, and since it is side dependant, I would have thought of the cv axels too....
Something that would be described as "humming" would point to wheel bearing, which is really side dependant: I've changed wheel bearings, i fact, "hub assemblies", three times now....turn one way it disappears, the other way, it is much more conspicuous...but it is not load sensitive....so I do not think this is your case
I would pay a visit to engine mounts......specially since it comes just after a transmission change....

Thanks for the quick response.. My shudder is a kind of stuttering... feels like the car wants to stall. But as i said only when making rights ???

...ok..."stutter" makes a difference in my understanding and associates it with the engine : this , just as described, has been reported a few times and I do not remember if a specific cause has been identified....I will search and come back...
..well found these 2 threads..but depending on key words used, I think there are others, anyway...
http://www.automotiveforums.com/vbulletin/showthread.php?t=398747
http://www.automotiveforums.com/vbulletin/showthread.php?t=148165
.. mention the problem and possible explanations, but no definite and confirmed solutions.
I would also check for any loose wiring or improperly plugged connectors that could change position in turns , make an unwanted ground contact...or loose contact....also, try to see if this happens differently depending on amount of gas in fuel tank, but I think it is electrical...check grounds and battery connectors, anything that has been unplugged/replugged during the xmission repair.
About fuel pump relay mentioned in threads, just swap one for the other as they are all the same, an easy test but you have to access them, not so easy although they seem right at hand...
www.avigex.ca/xport/relays.jpg

..and..better to try to find this by yourself..mechanics could spend lots of time on such problem....and based on the other threads, is it not life threatening, although annoying....

ok... BAckground. The Tranny was rebuilt 2 yrs ago( $2000) so i'm keeping it till it's dead dead dead. right axel changed out laast thursday(5 days) . aas well both ball joints(front) and the serpentine belt. Plugs and wires look to have never been changed... ( it passed the emmission ). There has always been a slight smell of gas but I don'ty see any sign of leakage. ( i've been under the van)

RE the stuttering... it does feel like it's about to stall but dosen't . and only in right turns. since gas went above 90cents I run half tank . This am I gassed it up and went for some right turns. ... No stuttering..... ( it's raining and cool today) .... I'll check for loose connectiions also but any comment on the disappearance of stutter with change in fuel level would be appreciated..

PS... read your post re ABS light ( ABS was makeing all sorts of noise.. then the light would go on).... pulled the fuse 2 weeks ago ... regular breaks are good.. ( never liked ABS )

spoke too soon... stutter is back..tank at 3/4 full... right turns .. ran it 70k on the 401 straight is fine ( a little vibration..in steering wheel... allignment due) but no stuttering except on right turn or slight right shift. Gave it gas while stuttering and stutter ceased as van accelerated ?????

spoke too soon... stutter is back..tank at 3/4 full... right turns .. ran it 70k on the 401 straight is fine ( a little vibration..in steering wheel... allignment due) but no stuttering except on right turn or slight right shift. Gave it gas while stuttering and stutter ceased as van accelerated ?????

... no stuttering except on right turn or slight right shift. Gave it gas while stuttering and stutter ceased as van accelerated ?????
I would be back on searching for steering/drive components ...WHen you changed the right (half) axle (and cv joints) , what was the symtom that lead you there?
Does the "stutter" generate some audible noise (like tie rod end slack) or do you just feel it? I am myself questioning some type of slight low frequency vibration/rumble on mine...a leftover after my ignition cable misfires was solved last week...which shows as soon as some torque - even slight and either positive or negative - is applied on drive train, and I think it is c.v. joints.

Agreed, inner can cause this if the tri -pot binds.

ok what a day.... nothing fixed and passanger window motor burned out..lol

the right drive shaft( cv joint) was changed because of a loud clunking comming fron the right front of van over bumps and making left turns... Inspection found left ball joint defective ...it was changeg... banging persisted.... Tech diagnosed noise from left strut... so it was replaces noise still persisted. ( original strut put back in) and drive shaft was replaced ( left ball joint was damaged in the processed and replaced) .... at this time all banging ceased...

had a rough ride home on the 407 so couldn't really distinguish any vibrations. Nearing ing home (70k driven) i get the shudder making a right going about 45k accellerating out of the turn.... Over the next couple of days it happens again ramps and slight right 's never on straight or lefts .

coasting throught the turn it's fine accellerating after the wheel straightens is fine. ...........you're right about mechanics spending time I know the guys at the shop so it's not killing me for labour but working in between paying jobs takes all day...

ok... one mech suggests that the drive shaft that was put in may itself be defective in that it is binding in the turn and not being engaged. without me saying so he says that would explain why it ceases when I accelerate hard... something to do with the shaft being engaged ( also the initial noise ( clunk)is re appearing ever so slightly) . While the guy who installed the shaft dosent think so the explination for the binding does make sense to me ... I head out Friday so I'll keep at it ... I just need not for the thing to quit in the middle of nowhere.... thakns for your response I'll keep you posted on any progress

Back from the east coast.... The shudder persisted and got progressively worse with time. A few scary moments but I've learned to manage the shudder at speed. Tuesday had the right drrive shaft removed and inspected and reinstalled nothing out of the ordinary. The tech's seem to think the transmission is ok. Apparently the RPM's dip when the shudder occurs so they think it's either fuel or electrical. changed plugs and wires and a fuel filter... ( the wires and plugs needed to be changed in any case... turned out to be a not so baad exercise 45 minutes and a little contorting)... this seemed to sole the problem for a while but today it's back to shudder as normal....... what should i be looking for?????


no problems while making left turnes.... making right's and now going straight shudde around 2000 rpm . if i gun it during the shudder there is a hesitation then the van takse off and shudder ceases???

Now I'm no expert, but what about the though of when the turn is made one of the fluids shifting might be causing this issue?

I use to have a 1991 Park Avenue with the same 3800 engine used in my 1993 Transsport, and in the Park Avenue, I had that issue with the fuel tank, even when it had just under 1/4 tank of gas and when I got on or off the highway (Sweeping right turns) the gas would shift in the tank and the car would almost stall or even stall (Shudder). Once the turn had ended I was on my way.

Not saying it's the fuel, but is there another fluid in the car that could do this???

LMP - What do you think?

G.

My '93 Transport developed a shudder when turning (engine idling) at slow speeds. The factory had a service bulletin that identified a problem in the steering hydraulics that caused a hydraulic pulsing load on the engine. Solution was to install a longer hydraulic steering hose to act as a pulsation damper. I suggest you check with a dealer for service bulletins on your vehicle.

Thanks for your input... the problem persists and is getting worse...I t seems more like a fuel issue as the engin is stuttering ( right turns and now straight...lol i can still turn left without any problems.. but I keep ending up in the same place). More investigation is needed I'm going to clean the throtle body just for laughs. I think the fuel relays are next then a fuel pump... the hydrolic pulsing load on the engin is interesting .. I'll tr anything at this point.


ok I juschecked the power steering fluid resivour and it was down quite a bit.. i topped it off but still have shudder i'll monitor over the next few days. Any comment??

Issue Resolved........ Installe new PVC VALVE with O ring seated correctly.... shudder gone
engine stalling ... gone

Symptoms appeared after oil change and worsened after other oil change (both at a shop)

Apparently they check the PVC valve with the oil change....... another post with similar issues showed PVC valve with missing O ring.... Thanks to all

http://www.automotiveforums.com/vbulletin/showthread.php?t=419777

http://www.lindertech.com/newsletters/nwk10~04.pdf