Hey guys, Ive been posting alot because your all such a great help thanks. I want to give my 2001 4.7l a "tune up" and need to know the key parts to look at, change out, repair, leave alone etc. The D has 131,215 miles and runs strong, the only thing is when going from 1st to 2nd gear the D kind of "jumps" forward...any ideas?

 

for a tune up just change the spark plugs, oil, air filter (if its dirty), and all other fluids in the D.

and for the jumping of the trans try changing the fluid and filter, see if that helps. use ATF +4 trans fluid.

 

ok thanks will do, any certain type or brand of spark plugs I should be using?

 

champion copper core plugs ONLY and make sure you use the same part number and dont change the heat range on the plugs

 

how do you manage to change the heat range on the plugs?


jjhalo - the part number for the copper champion plugs is : RC12MCC4

 

Thanks! what about changing the front and rear axle fluid? I recently had to use the 4WD and while making a sharp turn at a low speed it feels almost like I have a flat as it jerks back and forth, could it be something to do with the 4WD?

 

Use Champion Coopers Plugs (OEM), Champion Truck Plugs, or Champion Iridium plugs. The 4.7L has coil overs on each plug so no wires.


Fronts use 80w-90 Hypoid gear lubricant and the same for the rear. If you have Limited Slip Trak-Lok differential then you need to use Friction Modifier. You need 5oz and the best place to get it is Auto Zone and they sell a 7oz bottle for $5. If you chose Fully Synthetic then use 75W-90 with FM on the rear for LS rear end. I like Mobil One products.

 

I think its going to feel jerky when making a sharp turn in 4wd. it locks the diffs together so it doesn't allow the wheels to rotate at different speeds when turning. If your on asphalt or grippy road, the road won't let the wheels slip so it will feel jerky.

My D feels jerky like that too on hard ground but works very nice every where else . Correct me if i'm wrong someone but thats what i think is going on.

 

Ok good! Mine works well everywhere else too. Thanks

Hydrashocker: I noticed that the Iridium plugs were more expensive than the OEM and Truck plugs...whats the difference between them? Anything signficant?

 

Personally, I would go with Champion Truck Plugs as my ultimate choice. There are still tests on the Iridium being completed and so far everything is looking good, but I like what I know works.

Iridium plugs at $8.99 each are in comparison to Platinum concept as a NEW plug that is suppose to go 100K mile area. This is the new concept that new owners are looking for this time and age. One problem with this is the motors weren't set up to do this.....IMHO..... and therefore I rather lean to what works and what the motors were built to run. Regular Champion Copper plugs were what the motor was built with and delivered from the factory. The entire concept of the plug was it's built to fire a certain way and that goes all the way into the engineering of the motor, so with that in mind and years of technical data I go to what I KNOW works. The Iridium is suppose to be a better product but??????? I don't think they are worth the $$$$ as Champion Truck Plugs are like $2.50 each and Copper is like $2.00 each.

The Champion Truck Plugs are the same heat range 12 (or maybe a lil hotter) but they are built heavier to last in demanding motors under load. Regardless of Cooper or Truck plugs I would still change them out once per year or every 15k. The Iridium concept again is for the plug to last 100k but I have never seen a plug fire the right way after that kind of mileage either way.

You have to understand something, spark plugs are a concept of performance and compatibility. One MIGHT work in one motor but not in a different motor of the same thing. They are a concept like oil and which one is better. We can go on and on all day with different concepts and theorize but regardless truth be known, the OEM plugs are going to work every time because that’s what the motor is built to run.