99 Vs 2005 MPH VS RPM

[Mike_L]

Speedo calibration is easy. Diablosport Trinity or inTune, or even an old Predator if you can find one.

Does the XL have the same diffs as the short ones? I have 3.42s and would love to have 4.10s.

 

[turbopowered68]

Speedo calibration is easy. Diablosport Trinity or inTune, or even an old Predator if you can find one.

Does the XL have the same diffs as the short ones? I have 3.42s and would love to have 4.10s.

Idkd
That is something i could do But it would have to be a direct bolt on with ZERO rigging.

 

[Mike_L]

Its between generations, so it probably isn't.

 

[turbopowered68]

Just looked at my brothers RPO code (1999) and its GU6 = 3.42

MPH----Tire-------Trans-----Gears------RPM
60-----30.34------.70-------3.42-------1590

60-----30.34------.70-------3.73-------1734

60-----30.34------.70-------4.10-------1907

---------- Post added at 09:32 PM ---------- Previous post was at 09:17 PM ----------

No wonder i freaked out,
I drove my truck right after driving his.

 

[turbopowered68]

Well after getting used to my truck (05 XL) it's no wonder you guys thought that i was on crack for wanting to go to a 3.42 gear.
I love this damn truck, it pulls my 3800# car on a steel trailer effortlessly, merging onto a HWY is no problem, and MPG aren't that bad as long as i remember that i am driving a heavy truck, Which btw is hard to remember since it drives so damn good.
Lucky for me that i procrastinate about everything and i kept putting this stupidity off. Otherwise i would have fuckedup this truck big time. Put it like this I love the combo so much that i have been shopping around for a newer truck and i keep asking to look at the rpo sticker looking for the code for the GT5 code. No code onto the next truck.

 

[Mr. 960]

Yes GT5's rock!