2003- Ho? 4.10?
 

How do you tell if a 2003 Cummins is an HO or not? How can I tell what rear gears are in it?
Going to look at the truck after work and would like to be able to tell.

Here's some reading I found:

2003 235 @ 2,700 460 @ 1,400 47RE Auto 8216 CARB: Catalyst
235 @ 2,700 460 @ 1,400 Five-speed manual 8224 CARB: Catalyst
250 @ 2,900 460 @ 1,400 47RE Auto 2624 Federal (no cat)
250 @ 2,900 460 @ 1,400 Five-speed manual 8223 Federal (no cat)
305 @ 2,900 555 @ 1,400 Six-speed manual 2998 Federal (no cat)
2003.5 235 @ 2,700 460 @ 1,400 47RE Auto 8410 CARB: Catalyst
235 @ 2,700 460 @ 1,400 Five-speed manual 8412 CARB: Catalyst
250 @ 2,900 460 @ 1,400 47RE Auto 8212 Federal (no cat)
250 @ 2,900 460 @ 1,400 Five-speed manual 8226 Federal (no cat)
305 @ 2,900 555 @ 1,400 Six-speed manual 8228 Federal (no cat)
305 @ 2,900 555 @ 1,400 48RE auto 8213 Federal (no cat)


Basically it looks like in '03 (and '03 1/2) the HO was only available with the 48RE auto and the 6-speed manual. There will be a plaque on the drivers side valve cover on the engine that will tell you the power output.

Check the eighth digit of the VIN. It will either be a "6" or a "C".

6 = Standard Output
C = High Output

It's a 6. So not HO and it has a 5 speed.
I called the dealer and found out it also has the 4.10 rear end.

That can be easily taken care of with a Smarty Jr. [guitar]

I was looking at that or the S-06.
BTW, I have looked on the Mads website and can't find anything about this new "POD" (Power On Demand) feature?

had my 03 HO since new - if I remember right the only way you could get the HO was with the 6 spd manual so is a good indicator - I believe POD stuff is on the website but, you will be VERY happy with the Jr if you try it - LUV mine, think it is the best compared to the others I have tried on my truck! Good luck!

Is the only diff between the two the different power levels?
Picked up the truck tonight. So far very happy with it.

Engine output, transmission, possibly the smaller 10.5 rear end and different u-joints that I know of.

I have a 03 SO 5spd, smarty gave me two hundred dyno proven HP. . just something to think about.

now I am curious about my rear end gears. I run out of RPM about 106mph.

Cool.
Truck came with exhaust and CAI. FASS will be going on soon and then I'll replace those bright ricer looking Autometer gauges with ISSPRO. Man they are bright.