Replacement options for 05-06 NSG370 4.0 flywheels?

[Bdowdy07]

I am drawing alot of blanks on finding a good replacement flywheel for my 2006 LJ. I ordered a crown brand flywheel and one hole is to small and the milling is terrible. Turns out actual part number on product is referenced through other brands online for around $90(crown was $200). Luk lfw484 is no where to be found.

So my options are terrible quality for under $100, centerforce for $300, or OEM for $400. Surely I am missing something. Autoparts stores do not even bring anything up. I know it is a dual mass but I did not figure there would be so little support.

Old flywheel is toast at 65,000 miles. I think it is due to taking abuse from being under geared its whole life(3.73 and 35s).

 

[astjp2]

Have it turned and run it, there are those who feel that the bevel grind the factory did is super important, I am not of that group. My 800 hp 572 hemi has a flat ground flywheel, came that way stock. Good luck, tim

 

[Chris]

I would just have it turned personally.

 

[skrelnik]

I am drawing alot of blanks on finding a good replacement flywheel for my 2006 LJ. I ordered a crown brand flywheel and one hole is to small and the milling is terrible. Turns out actual part number on product is referenced through other brands online for around $90(crown was $200). Luk lfw484 is no where to be found.

So my options are terrible quality for under $100, centerforce for $300, or OEM for $400. Surely I am missing something. Autoparts stores do not even bring anything up. I know it is a dual mass but I did not figure there would be so little support.

Old flywheel is toast at 65,000 miles. I think it is due to taking abuse from being under geared its whole life(3.73 and 35s).

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It's a tough dilemma, and after I saw the options I went with Mopar. The cheaper Crown flywheel is a part I would use as a last resort, while Crown is a great source for Jeep parts, their quality is bleh. Centerforce wasn't worth the risk, they are known for high performance which the Wrangler is not, so Mopar was for me. I really wanted a Sachs flywheel but could not find one. Look up Sachs DMF91170 to see if you can find one.

 

[CharlesHS]

LUK makes a quality product when it comes to clutches and flywheels.
This link below is for $135.

LUK Flywheel

 

[Steel City 06]

I bought a Centerforce high inertia flywheel. It's almost twice the weight of stock, so it adds a lot of rotational inertia to the engine. Makes it nearly impossible to stall. I have had zero issues with it, and like having the extra weight. It fit perfectly.

Only problem is it is very expensive. More than most will want to pay.

05-06 only:
https://www.quadratec.com/p/centerforce/high-inertia-flywheel-jeep-wrangler-tj-40l
91-04 only:
https://www.quadratec.com/p/centerforce/high-inertia-flywheel-jeep-vehicles-40l-engine

 

[Bdowdy07]

It is nice to know I am not alone! Thanks for the link on the luk flywheel, Google the actual part number got me now where!

I considered turning it but really want to see how it feels with a proper flywheel considering it has been this way since I bough it and something always felt a little odd about it.

I am leaning towards the centerforce being it is the same price as mopar with added benefit.

That Sachs will not even come up on there website anymore. I am wondering if one manufacturer was making these for alot of the brands and just stopped.

I am wondering who made the mopar one.

 

[Bdowdy07]

I bought a Centerforce high inertia flywheel. It's almost twice the weight of stock, so it adds a lot of rotational inertia to the engine. Makes it nearly impossible to stall. I have had zero issues with it, and like having the extra weight. It fit perfectly.

Only problem is it is very expensive. More than most will want to pay.

05-06 only:
https://www.quadratec.com/p/centerforce/high-inertia-flywheel-jeep-wrangler-tj-40l
91-04 only:
https://www.quadratec.com/p/centerforce/high-inertia-flywheel-jeep-vehicles-40l-engine

Just out of curiosity is your rig offroad mainly. I like to drive mine on the highway and DD it some weeks. Do you feel the centerforce would be good for this? I can't think why it would not be.

 

[CharlesHS]

It is nice to know I am not alone! Thanks for the link on the luk flywheel, Google the actual part number got me now where!

I considered turning it but really want to see how it feels with a proper flywheel considering it has been this way since I bough it and something always felt a little odd about it.

I am leaning towards the centerforce being it is the same price as mopar with added benefit.

That Sachs will not even come up on there website anymore. I am wondering if one manufacturer was making these for alot of the brands and just stopped.

I am wondering who made the mopar one.

My apologies...
This link should work...
By the way... LUK is produced by Shaeffler Group USA.

LUK

 

[Steel City 06]

Just out of curiosity is your rig offroad mainly. I like to drive mine on the highway and DD it some weeks. Do you feel the centerforce would be good for this? I can't think why it would not be.

I'm probably 90% street and highway. I currently have a 6 speed and 4.10 gears on 35s (will regear to 4.88 eventually).

It doesn't have a great impact on driving on the street or highway, except for a little less vibration. The only noticeable difference once you're moving is that the engine takes a little longer to rev down when changing gears. For me the timing works perfectly, as I can hit the clutch, shift gears, and drop the clutch and be almost perfectly rev-matched.

The big difference comes in starting. It is much harder to stall the engine if you let out the clutch a bit too aggressively. Even staring in 2nd gear while undergeared for 35s I still have no issues with stalling.

Also, if you do a lot of idle driving, such as using 1st or 2and to idle through a parking lot or an obstacle off-road, it really shines there. Less vibration, and if the revs do drop suddenly the engine keeps going.

It's not a groundbreaking difference. But it is noticeable.

 

[Steel City 06]

If you do buy a centerforce (or if you ever plan to add a supercharger or turbocharger) I recommend picking up a set of ARP flywheel bolts.

The ARP bolts are significantly stronger than stock, and are an extra measure of safety to ensure the flywheel stays where it is supposed to be.

 

[Bdowdy07]

I'm probably 90% street and highway. I currently have a 6 speed and 4.10 gears on 35s (will regear to 4.88 eventually).

It doesn't have a great impact on driving on the street or highway, except for a little less vibration. The only noticeable difference once you're moving is that the engine takes a little longer to rev down when changing gears. For me the timing works perfectly, as I can hit the clutch, shift gears, and drop the clutch and be almost perfectly rev-matched.

The big difference comes in starting. It is much harder to stall the engine if you let out the clutch a bit too aggressively. Even staring in 2nd gear while undergeared for 35s I still have no issues with stalling.

Also, if you do a lot of idle driving, such as using 1st or 2and to idle through a parking lot or an obstacle off-road, it really shines there. Less vibration, and if the revs do drop suddenly the engine keeps going.

It's not a groundbreaking difference. But it is noticeable.

All that sounds good! I definitely will get the arp bolts.

I am kicking around supercharger in the future. Definitely would be alot of fun!

 

[Gravelhack]

I think the hi inertia is the way to go. https://www.quadratec.com/p/centerforce/high-inertia-flywheel-jeep-wrangler-tj-40l