Shudder when accelerating.

Hey all.
My latest concern is I have a shudder when I accelerate and a residence/ vibration when I'm at cruising speed on the freeway.
2002 automatic transmission.
As always, any input is appreciated. Hope everyone's having a good week.

 

Motor / transmission mounts maybe?
Check driveshaft and u-joints?

 

I will vote True Texas ideas

 

Mileage on vehicle?

When's the last time you had your transmission serviced/fluid change?
Does the shudder continue when you are coasting in neutral?
Does the shudder continue in 4WD?

 

If the shudder was at 30 mph plus or minus-with light throttle, I would highly suggest considering the torque converter "patent Flex Lock" lock up, system located in the tranny valve body.
The test is to modify the TC lock up by driving in S4 instead of "D". This test is for the A750 5 speed. The flexlock shudder is canceled by the TC programming. You probably have the 4speed tranny. Could be very different with S3.
Any evidence of excess TC clutch material in the ATF?

 

If its missing it will vibrate.

 

You got pink milkshake?

 

He would have the A340 transmission. Not sure any of this would apply.

 

Yes, that is somewhat common as causing a shuddering feeling.

OP, is going to have to determine if it's the transmission or the engine that is causing the shuddering. Kind of hard to get any bead on it without feeling it.

Any codes at all? I assume not but figure I'd ask.

 

Hey all...
It turns out I've got a tiny bit of side to side play with the rear u-joint.
I'm going to swap it out.

 

I'm going to throw a meter on it and check that. Thank you

 

No... Thankfully!

 

Going to throw the tester on it

 

Leaning towards the U-joint as the issue. Still checking though.

 

It's a two-wheel drive 4 speed. Transmission fluid looks good but I'll look into that too.
Thank you.

 

For Speed automatic. Fluid looks good.