30,000 Maintenance

[mike508]

I have an 06 with 30,000 miles and am looking at the maintenance schedule. The book says I need to replace the plugs but this seems awfully soon even if they are not platinum or iridium (the plugs are NGK LFR6C-11).
also the dealer says I need to replace both front and rear differentials and transfer case fluids since it is hot here in Texas but not the transmission fluid since it is a sealed unit.
The maintenance guide doesn't recommend replacing the differential fluids ever unless you are towing which I am not.
Does anyone have any experience that says these things need to be done?

 

[G.I.G.]

Do you have the V6 or the V8? 4x4 or 4x2?

The V6 maintenance schedule calls for the spark plugs to be replaced at 30k. It's 100k on the V8. I own the V8 and will probably replace my plugs at 80k just to err on the side of caution.

Although the maintenance schedule does not call for the gear oil to be replaced at 30k mile intervals, I would recommend doing it. I changed mine at 30k and I'm glad I did. The rear gear oil was just about sludge on mine and the front and center looked pretty grimy as well. I put Mobil 1 gear oil in my 4R and intend to change it again at 60k miles. If it looks like the Mobil 1 is holding up at 60k, I might wait a longer time after that. FWIW, I don't tow. If you have the V8 with full-time 4x4, I would do all 3 T-cases. It's cheap piece of mind and you can do it yourself on the cheap.

 

[mike508]

Thanks for the input.
I have a V6 with 4WD. I have never changed gear oil on any vehicles I have had in the past but you are right it is not a very high cost item but a bit of a hassle getting it in.

 

[Uneek]

Get a gear oil pump. $8 at CSK Auto.

I got about half of the bottle in the transfer case and almost all of it in the rear diff without a pump. I haven't gotten around to doing the front diff yet. The oil in the rear diff was dark and transfer case was still like new at 30k.

 

[Doozi]

The manual calls for "SAE 75W-90" gear oil for the front diff and transfer case, but "SAE-90" in the rear diff. I was planning to switch everything to Mobil 1, but I can't find "SAE-90". What are you using in the rear diff?

Don't mean to hi-jack, but I figure this info would help the OP as well.

Thanks,
~Dave

 

[CJ3Flyr]

The manual calls for "SAE 75W-90" gear oil for the front diff and transfer case, but "SAE-90" in the rear diff. I was planning to switch everything to Mobil 1, but I can't find "SAE-90". What are you using in the rear diff?

Don't mean to hi-jack, but I figure this info would help the OP as well.

Thanks,
~Dave

Most are using 75w-90 in everything with great results.

 

[howieb]

I have an 06 with 30,000 miles and am looking at the maintenance schedule. The book says I need to replace the plugs but this seems awfully soon even if they are not platinum or iridium (the plugs are NGK LFR6C-11).
also the dealer says I need to replace both front and rear differentials and transfer case fluids since it is hot here in Texas but not the transmission fluid since it is a sealed unit.
The maintenance guide doesn't recommend replacing the differential fluids ever unless you are towing which I am not.
Does anyone have any experience that says these things need to be done?

I bought a used 07 about 8 months ago and I'll have to admit I was disappointed that the plugs need to be replaced at 30K, especially considering I had 32K on the car when I bought it with original plugs. I guess they need the revenue. But I drove my 98 for 240K and my approach was to do the diff servicing at 60K intervals. I am in CT, not sure if the heat makes a difference.

 

[mike508]

30K Maintenance

Toyota says the plugs need to be replaced to meet the emissions control warranty. Since the gap gets larger with age, the spec is a max of 1.3mm for used plugs and 1.0 to 1.1mm for new plugs. They also say not to adjust the gap for used plugs. The manual says the insulation resistance should be 10M or more.
One could reach the conclusion that if the insulation resistance is more than 10M and the gap is set to 1.0 mm, used plugs would meet all the requirements. I don't know why they say you can't adjust the gap on used plugs unless they are afraid it will break. I have adjusted the gap on other cars for years and never had a problem. Any thoughts?
Mike