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Discussion Starter · #1 ·
Thanks to member darknight for trying this mod out. He confirmed that this ATI underdrive pulley/super damper fits and works on these trucks. He said the truck feels "lighter" with the underive pulley as well. And we don't need to mention how good ATI dampers are, I'm sure he just added life to his engine.

Just wanted to share the good news :smileup:
 

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I'll be posting some pics!
 

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Thanks to member darknight for trying this mod out. He confirmed that this ATI underdrive pulley/super damper fits and works on these trucks. He said the truck feels "lighter" with the underive pulley as well. And we don't need to mention how good ATI dampers are, I'm sure he just added life to his engine.

Just wanted to share the good news :smileup:
I just ordered mine. How is the install guys? Difficult?
 

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Discussion Starter · #4 ·
You need a special removal and install tool from what I understand. Nick at airram will rent/loan you the tool for 1 week for a small fee, IIRC it's like $15 + shipping, so ~$25 or so. Then he charges additional for each day after 1 week if you have it that long.
 

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The install went pretty quick compared to what i was thinkin it was going to be. Remove the fan shroud for sure. Then remove the stock belt and get to work on removing the stock pulley and damper. I put my truck on ramps that helped a whole lot. Then once its off put the damper on and torque it to specs. Then the pulley and also torque it to specs. then you are basically done. Put the new belt on and turn her over to make sure everything runs good.

It would be best to use a impact gun if you have one. I had to use a breaker bar and wedge a pipe wrench at an angle to lock the pulley in place to break that center bolt. The impact did the rest of the work. Then you use the puller to bring the pulley out. you can only use the impact to a certain point before the back end hits the radiator. At that point i used a ratchet to do the rest of the pulling using the puller tool.

Quick tip: (if you use the puller from air ram it comes with two rods. Those rods are NOT long enough. You have to put the center bolt back in and use the stud from the puller tool to push off of that. Then once the stud bottoms out just remove the tool then loosen the center bolt to raise it up and put the puller back on and do it again till its completely off.)

Then install the damper pretty simple. Just follow the instructions it comes with since you have to use the specs when torquing the new pully/damper. Get the correct belt diagram and put the belt back on.

Useful Tip: (Take a picture of your stock belt setup before removing so you can go back and reference when installing the new belt.)

:smileup:
 

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The one provided from the website.
The stock one was WAY longer lol.
Went to o 'Riely's and bought an in-house brand. MasterPro i believe was the name of the brand.
 

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Discussion Starter · #9 ·
Just to sum up everything for this pulley:

All the parts needed to do this job(except the belt I think) can be bought at airram. The damper and pulley(they have 4 configurations) and the installation/removal tools(can be rented as well).

The belt they recommend for the under drive is Goodyear 4060855 Gatorback Poly V-Belt and can be found at your local part store.

They have a 6" and a 7" damper, along with a stock diameter pulley and a 25% under drive pulley. Both pulleys can mount to both dampers. They say the 7" damper is recommended for 7,500rpm or above(so probably almost nobody).

They also have an alternator pulley kit if needed. Made by MSD.



Luis, I didn't actually do the work and you did, so if I missed anything fill in the blanks :)
 

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Ya the 7" damper is more used on a supercharged engine is what nick from airram informed me on. My stock alternator pulley seems to work just fine. All electronics ect. seem to be working normal. If your local parts store doesnt carry the Goodyear 4060855 Gatorback Poly V-Belt they are able to convert the part number onto another brand and get you what you need. So dont get discouraged when they say they dont carry goodyear (My O Riely store didnt carry goodyear).
 

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Sorry to dig up an old thread but curious how the underdrive was working after 6 months? Also does anyone know if the engines are the same in the Dakotas as I have a 2010 Dakota 4.7 Id like to try this on
 

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For the underdrive damper part it is working Great!:)
 

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Discussion Starter · #14 ·
He has the 25% under drive and the smaller damper (6" IIRC). IIRC they have a 6" and 7" damper, the 7" is for very high rpm or very high hp.

It should go right on your dakota just like the ram. You need the special tool(s) also, I think airram rents them if you want to do that, email them they will help you out.

I am going to get one of these eventually as well. I found a dyno from another company(can't remember who right now) that sold a 25% under drive pulley for the 08+ engine and it showed 27lb ft gain. That's huge. Theirs doesn't have a damper though.
 

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I'm familiar w/ how they work, I put an underdog pulley on my ranger a few years back. Was the performance worth the money? I looked into this on the air ram site a bit. Looks like a high quality piece, not sure if its worth $450 though.
 
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