LSD Oil Change & Spark Plugs at 45,000?

[naunibecker55]

I have to get service done soon so I just am going to have them do the 45,000 mile service. Costs like $100 for oil, rotation, inspection, lubrication... blah, blah, blah. It's easier than doing it myself here.

Here is the question, should I have them change the spark plugs and the LSD Oil or are they going to inspect this stuff? They said $120.00 for the LSD change when I called earlier... I bought the truck used at 24,000 miles and now its at 48,000 or something like that. Is changing these things necessary at this point? My first instinct is that it is necessary and even if its not necessary it can't hurt, but that price for an LSD oil change seems steep. I was going to do it because those are the last two things I haven't done since I bought the truck and I don't know if or when they were ever done.

Only one dealer within 150 miles up here so I don't really have much choice with where I go...

[fastone01]

If there was no history of maintenance you can obtain, the plugs are over due by 15K, LSD gear oil, needs to be done too. I would suggest you do this things yourself as they are fairly easy to do.

Plugs

Get NGK or NIPPO regular plugs. Accept no other brand replacement. You are not really gaining any performance for the money using Platinuim or Iriduim plugs unless you want to lenghten the change interval. If you do want to upgrade plugs, get the NGK Iriduims. The tip is .7mm for long life. You can get it from

http://www.sparkplugs.com/default.asp?KID=165

Get the .032 gap Iriduim plugs if you are interested. Other than that, get the regular tip plugs.


LSD Oil.

I would put 75w/90 synthetic GL5. Also get friction modifiers additives from any part store. I use the ford dealership friction modifier as that was what the differential shop that installed my Eaton/Kazuma LSD recommend to use.
35K miles on the synthetic oil and no chatter/clunking/niose ever since install.
Once in a while it will let you know that you have LSD while turning on a parking garage.

Hope it helps

[mitchr]

Below is from the NGK website. It state's that the iridium is .6mm not the .7mm. The reason I looked it up i thought there might be 2 different iridium NGK plugs for our trucks. I had saw some wildly different prices on them. These were listed at $6.95 each and I have saw them for over $12 ea. Not trying to question you just got me to thinking about it.

"14mm, 3/4" reach, 5/8" hex, gasket seat, ISO length, resistor, projected tip, fine wire (0.6mm) iridium center electrode, tapered cut ground electrode

NGK iridium plugs represent the ultimate evolution of spark plug technology and performance. The iridium center electrode is both stronger and harder than platinum. This allows NGK engineers to design an ultra-fine (0.6mm)center electrode reducing the voltage requirement for spark. This allows for a brighter, stronger spark from your existing ignition system. The ground electrode has a tapered cut at the firing end which reduces quenching for better flame core growth and increased ignitability. The combination of fine wire center electrode and tapered cut ground will increase performance, improve acceleration, and fuel efficiency."

[fastone01]

Hey,

Thanks for the correction. The main page of this site >
http://www.sparkplugs.com/default.asp?KID=165
states that NGK IX iridium .7mm. I guess I never measure mine. Nippo is .4mm.

thanks

Originally Posted by mitchr

Below is from the NGK website. It state's that the iridium is .6mm not the .7mm. The reason I looked it up i thought there might be 2 different iridium NGK plugs for our trucks. I had saw some wildly different prices on them. These were listed at $6.95 each and I have saw them for over $12 ea. Not trying to question you just got me to thinking about it.

"14mm, 3/4" reach, 5/8" hex, gasket seat, ISO length, resistor, projected tip, fine wire (0.6mm) iridium center electrode, tapered cut ground electrode

NGK iridium plugs represent the ultimate evolution of spark plug technology and performance. The iridium center electrode is both stronger and harder than platinum. This allows NGK engineers to design an ultra-fine (0.6mm)center electrode reducing the voltage requirement for spark. This allows for a brighter, stronger spark from your existing ignition system. The ground electrode has a tapered cut at the firing end which reduces quenching for better flame core growth and increased ignitability. The combination of fine wire center electrode and tapered cut ground will increase performance, improve acceleration, and fuel efficiency."

[KLS]

naunibecker55,

Pull out your owner's manual, see what should have been done for the 30,000 mile service, and get it done. If you don't have an owner's manual, you can get the info to order one by phone from the dealership parts department. That charge by the dealership is way too much for the differential gear oil. You might have a local independent shop do all the work, or have an oil change place do the differential if you watch them closely and don't let them screw up. I'd use Mobil 1 75W-90 or other quality synthetic gear oil. Most already have the LSD additive in the gear oil.


Ken

[Invid]

Since you're a subscribing member there's a pdf manual in the members area. Also I would change these myself too if I were you, it's real easy.