Hi Marcus,

        Remember, I’m one of the least skilled on the list.  But, I have some thoughts for you.

Often in my work I’ll do something and then later notice something on the van that should have nothing to do with what I just did is acting up. 

Sometimes this just happens, and it makes figuring things out extra challenging. 

        I think your Coolant fix has nothing to do with the shuttering. 

I do thing the loose CV bolts is a better clue. 

        I’m not aware of anyone reporting bolts coming  loose on this list in all the years I’ve participated. 

Have you checked the other CV bolts? 

Have you done recent work on the CV joints?

Have you raised the van up and checked both front and rear wheels for play?

And, tires are certainly a possibility.

I look forward to others suggestions and your updates.

Eric Caron 

> On Sep 19, 2023, at 2:54 PM, Markus Benne <mbenne@M-BASS.COM> wrote:
> 
> Resend to deal w crazy formatting.  I hope.
> Hi ,I think I've got a good one.   This is going to take me a while to sort out....glad it's close to the end of season.I had a sudden coolant leak located near the engine, on a hose that runs to the hard pipes to the front.No problem.   Found the hole, replaced the hose, bled and it all good.   Great.Now, while driving, there is a significant shudder over 30km/h.Other than the hose and coolant stuff, the only other work I did was tighten up bolts on a cv joint that I'd noticed were loose.Shuddering is worse under load, but still detectable when not under load.I did notice tires are bad, but the coincidence of that issue coinciding with the cooling issue seems unlikely.I'm going to back off the brake near the coolant spray in case the shoe got contaminated and is binding, it may have been in the line of fire.Then I'll test w different tires, but after that I'm out of ideas at the moment.