It was at the new girlfriends house all snuggled up. Finally had to get up and start my jeep for use in about ten min. It was the coldest day of the year.
neg 16 degrees windchill was something like -37 to -45.

It cranked and cranked and cranked and finally turned over, and it didn't want to run very well. But it still did. I let it warm up for about 15 minutes.

I was impressed.

If I could just get it to stop grumbling. As it gets older it just seems louder and louder, and it runs fine. I feel like it grumbles louder when in 4 wheel drive. Any thoughts on that?

new muffler, rear diff is fine. Seems like it comes from the connection between the engine and tranny but it runs and shifts fine.