i think lol

 

I just verified when I had the spare off for my flat tire yesterday. My differential cover has a 3.5 tag..........Can I conclude it is 3.55 ratio?

 

Hmmmmmmmm...............LOL


God I'm good!......

 

ok hydra, since he has confirmed that explain why he does 70 at 2k rpms and i do 75 at 2k rpms? (magic what is your tire size?)

 

I have a incorrect ratio because of tire size at slow 7.8% or something like that. This was at a gearing difference of .27 gearing. I would assume that the 3.55 to 3.92 is a .37 difference therefore the speedo should be off a lot further.

It's gotta be something lighter around 5%

 

245/70/16's spare is a 265 but I am not changing it out unless I really have to.

 

ok i think that would explain the difference, im pretty sure mine are 265s (w/e the size is works out to 31inches diameter)

 

Yup,

knew it had to be a tire and not the gearing.......

 

your thermostat is stuck open, and possible not all the way open. a healthy t-stat will help your car warm up to operating temperature faster and if you ever have to drive up north it will let you have heat in your car when it gets really cold out. Also if and when you replace it you can see the condition of your cooling system, you may also need a flush. I suggest getting a 180 degree t-stat vs. the stock 200 or whatever stock is..

 

i believe stock is 190, and on the 4.7 you have to be careful when replacing the t-stat bc if you get one without the weep hole it will cause problems, and 180 stats are hard to find with that weep hole in them

but also a bad stat would show up in long warm up times(might throw a code for that im not 100% sure) and a slightly high running temp (if its stuck partially open) he claims his is runing a little low of center (which is where it belongs under normal driving conditions)