ticking timebomb or not

[6.0PSD777]

When the dealer hooks it up to flash it they can tell if has a tune - u can tell if it has studs just by looking at the head bolts, Egr delete u can look at the egr valve on the top of the motor and see if it has a plug in it instead of the valve and/or look on the passenger side of the motor in the valley under the intake and u will be able to see if the egr cooler is still present.

 

[saint08]

my axle is shown as D1 — 3.73 limited slip. The 4.10 is better for pulling and the 3.73 is higher geared, possibly for better fuel mileage?
Is this correct?
Or is it the opposite?

 

[Gumby]

I would recommend cleaning your EGR valve every 10K.

You can also tell if it has a EGR delete by looking for the EGR cooler or if the EGR valve gets dirty after you clean it the EGR system is working as to EPA regs. IE: no EGR delete.

 

[DaveBen]

my axle is shown as D1 — 3.73 limited slip. The 4.10 is better for pulling and the 3.73 is higher geared, possibly for better fuel mileage?
Is this correct?
Or is it the opposite?

That is correct. Higher numbers for pulling and lower numbers for mileage.

Dave