Hello everyone, first time Dodge Ram owner here. So, I picked up a horribly misfiring 1997 Dodge Ram 2500 4x4 with a 5 speed NV4500 transmission and a 360 V8 engine. Knowing that it would need a lot of work I pulled out the engine to find a destroyed #5 exhaust valve. Now, I'd like to put a new clutch in this truck, so I started shopping around. Found that Centerforce makes a pretty sweet set up so I went to order one today and was asked if my clutch was a 11" or 12"...which mine is a 12". They don't make a 12" for my truck. So I called the dealer and gave them the VIN, they say it's supposed to have an 11", not a 12". They also said that the Heavy duty probably takes the 12" while the the Light duty would take a 11". I assumed that a 2500 pickup with a huge NV4500 trans and a boxed frame would be "heavy duty"...so I'm a little lost now. I saw the GVW was 8800 lbs according to the door sticker, so would anyone know from the information I've given whether or not I have a heavy duty or a light duty? Forgot to add that the engine does not have an EGR valve...if that helps. Also, I was sniffing around on alldatapro.com and found that the supposed heavy duty had two upstream oxygen sensors while the light duty engine had only one right in the cat. I noticed that my truck (being hacked together and cat-less) only has one upstream oxygen sensor connector (as far as I can see). I'm a little lost, probably gave too much information and confused some of you, but if anyone has anything to share that may help me I'd really appreciate it, thanks.

 

others should pack this up, but because you have the v8 gas engine 2500 its still a light duty, heavy duty was reserved for the cummins and v10 setup. i cant help you with the clutch size, i have an automatic. but i would go with what the vin number says.

 

^^ +1. I would go by what the dealership said with the 11" and take a look into the south bend clutches. They are used in performance diesels and will last a really long time and give better clamping force, just stuff I've heard about them on the web.

 

You have the "Heavy Duty". From 1994 to 1997, Dodge offered 2 GVWs for the 360 3/4 ton which were 7,500 and 8,800.

 

Thank you for the help! May I ask what "baby" light duty ram is supposed to mean? The reason I was so pumped about finding this set up is A) I really only enjoy driving stick shift and I've heard a lot of good things about the NV4500 and... B) Dana 60's front and rear, plus it came with 4.56 gears already installed which was a huge plus. So now for my next question...how big a difference would a 12" clutch make compared to an 11"? I work for a dealership and I get a Chrysler clutch kit for just a little over $200, where as a Centerforce II would be atleast $350. Since I plan on doing a little plowing along with some off roading, I want a clutch that will hold up to being slipped once in a while to get out of sticky situations and whatnot. I'm not sure if the $150 savings by going OEM would be worth it...what do you guys think? Oh and I'll look into southbend.

 

Yeah you have to check the GVW. I have a 99 2500 with the 360 5.9L and its the Heavy Duty Edition. You can also check the VIN number. That will tell you whether it is or not also..

 

Well I figured it out for sure...it's a light duty. Not sure how much of a difference there would be between the two but I'm glad I know for sure now. This is how I found out...

EML = 5.9L 8cyl MPI Gasoline
EMM = 5.9L 8cyl MPI Gasoline HD

DDP= 5-speed Manual (NVG 4500)
DDX= 5-speed Manual (NVG 4500 HD)

My code is a EML engine with a DDP transmission. Thanks for the help guys!

 

good info!

 

now im curious to know the true difference between the EML and EMM engines? higher compression ratio? more power? different computer? anybody out there know?

 

I remember it mentioned the two engines in my owners manual....and stated some different statistics about them... I curious too now....probably mainly beefed up things like radiator and tranny cooler and higher output alternator and such....as well as likely tuning for more torque at cost of hp.