Shocks

Get some kind of penetrating oil and spray them good. Let soak and if they don't come loose, you can spray them and use a torch to heat the nuts. They can be rusted pretty tight. I do believe metric also.

X2 on the lefthanded mexican speed wrenches.

Just get 2 large metric Cresent wrenches. :h

On a serious note, make sure you measure the hex on both the nut and the bolt head. They can often be different on the same thread size; especially the larger fasteners in the metric universe.

Kris

Going to be visiting at a friends for 4 days next week so we
can tackle the job- shocks are being delivered to his house and I would get everything set up for when I get there RICH

You can tell with a tool called a micrometer. They are cheap at places like harbor freight.

"racer99".....Not to insult you, but if you don't already have the tools and plan on doing this in a campground, this is probably not the job for you to tackle. Doing service in a campground is usually a big no no.

Thanks dakdave
Good to know somebody has a comment that don't help the situation BUT
I am currently driving down the interstate but I crawled under MH just to see if it was a job doable by myself at a campground and yes I will get out a tape and try to get a measurement but I hoped someone may have tackled this lately and remembered the sizes RICH

Suspect they would be metric. Most everything on my 06 chassis is metric. Took me 30 minutes to replace using air tools.

I believe they are SAE, but it's been a while since I changed mine. You will need a long breaker bar or be really strong!!!! Or a good stout air gun. My $80 gun wouldn't touch them.

A name racer99 and you don't own a tape measure ? must have been interesting racing.