150K Today

Just turned 150K on my 2006 4x4 off road. Knock on wood, never had any trouble with my baby. I've done routine maintenance up to now. Plugs every 30-40k and changed my differential oil twice. I also changed the tie rod.

Now that I've turned 150k Im ready to invest in some real preventative maintenance. I've checked the owners manual maintenance suggestions, but really wanted some input from ya'll.
What do you guys think of the AT fluid change or flush? I dont tow and no issueds with my transmission so im not sure I should even do it. Can ya'll give me the top 3 things I should do? Plugs are a given, but what else are ya'll thinking.

 

My 2009 is at 155k so same boat as you.
As for trans fluid that question has a crap load of opinions you can read. I did it at 100k shifted better and converter lock up was firmer so you decide.
You did both diffs but don't forget to change the transfer case oil too. Assume you did coolant and opened the 2 block drains. Check the hoses mine are still firm.
Next for me is the PS hose set and a refill as corroded lines (down on bottom) so new from Rockauto about $75.
I have pushed my luck on all 3 idler pulleys and the tensioner so OEM ones for those at about $300 - no rebuilding bearings for me.
While down there I am going to put a rebuild Denso 130A alternator in about $125 from Carid. New belt also.
I do long trips so decided cost over breakdown on the road won out for my peace of mind.

I already did the brakes and changed to stainless braided hoses a few years ago so look at the stock hose condition.
Look at the CV boots and that drivers side axle shaking in the inner diff is normal (have a bushing fix if required see posts).
I had my rear diff and bearings replaced at 100k and front bearings too as they were all failing/grating/whining so check those.
Finally if you are stock driveshaft check u-joints and center carrier for play/vibration (TW 1 piece in mind so all fixed).
Shocks probably shot by now as I put in 5100s all around with my Dakar springs years ago (2" front lift and 3" rear).
That's all I got for you. Cheaper to fix than replace the Tacoma!

 

I have 151k on mine, also no problems. Here’s my 3 top suggestions (I’ve done all these):

1. Transmission drain and fill that includes dropping the pan and replacing the filter. You can also add a Magnafine filter on the return line like I did.

2. Front wheel bearings

3. Flush your power steering with fresh Valvoline MaxLife ATF.

I’ve also done the coolant a few times, new serpentine belt and pulleys (just replaced the bearing on the tension pulley), and I replaced the alternator even though the old one was still good. New Denso one was cheap and I had the time to swap it.

 

My 07 is at 202,000. I don't plan to touch the ATF until I have the transmission rebuilt somewhere around 400K. It'll last just as long either way. Just save your money until it needs to be rebuilt. The exception to that is if you let the transmission get too hot and the fluid is burned. Then change it ASAP even if it were done recently.

I replaced the oil in both diff's and transfer case at 160,000 along with the plugs at the same time. I check the serpentine belt and replace as needed. I think I've done that twice. Coolant and hoses are still factory. I'm probably going to change those in the spring.

 

In addition to what others have said Clean the MAF and throttle body. Replace the serpentine belt. Flush the radiator, replace the radiator hoses and heater hoses. While you are at it consider replacing the water pump. A lot of people overlook their air filter and cabin filter, check those.

 

I gave into the “don’t touch it” transmission scare until around 170k maybe (should go verify). Either way did the pan drop, filter change routine and regret not doing sooner. Shifts tons better. Now over 180k without issues. If you start doing these other fluids, make sure you can get your fill plugs out first! None of mine were stuck but I didn’t have anything that’d fit up there to get the transmission fill plug out. That would have been a pisser. Worst case I can walk to an Advanced now, but where I lived before would have been a serious issue.

 

All fluids........yes........brake fluid too......

150K on original transmission fluid ?

 

why the wheel bearings?

... recently turned 150k on my OG 1st gen!

 

just cuz they start to go after 150k. I got them from the guy on Tacoma World who presses in quality Japanese bearings into a new hub assembly. Pretty easy swap doing it that way.

 

i would think the bearings would start to make some weird noise if going bad but idk?
also if you have a lot of salty winter slop, roadspray and that get inside it can lead to more bearing wear perhaps?