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Discussion Starter #1
As the title says, I'd love to get some feedback on (possible) 2007 FJ issues. Mostly rear diff advice.

I purchased mine just over a year ago in WA and brought it back to Western CO. I love everything about it and want it to be primo for me and anyone else that may ever own it. 2007, auto, almost 96k miles, mostly stock with meaty KO2's. I baby it on the road but when I hit the dirt, anything goes.

I have the notorious transmission shutter. It doesn't really bother me. It starts around 40 mph and comes back in the higher 40 mph's. I just back off on the gas pedal for a sec and all is good. As long as nothing goes "pop" I'm ok living with it.

I also get all the dash warning lights lighting up on occasion. It lasts a day and then goes away for a couple weeks or month. Scans (AutoZone) have been all over the place (O2 sensor, etc.). I've been less than impressed with Toyota here on the Western Slope of CO, but I may need to get it to them for a better scan.

Other than that, she's a beast.

My big concerns -
  • Rear diff - some talk of faulty gears in the 2007 rear diff and possible failure.
  • Alternator - lots of talk about failing alternators (all years I believe). I have minimal power draw but may add a fridge, lighting, etc. someday.
Anything else you guys have experienced that could help others out?

I'm ok in investing in some upgrades on old Betsy, I just wanted to get some opinions on whether I should just drive it till something breaks (if it ever does), or if you experienced FJ guys and girls recommend addressing known potential issues before they possibly break.

Thanks in advance and if anyone ever needs anything on the Western Slope/ CO/UT border, send me a msg anytime.

1120294
 

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IMO.....If it anit broke....don't "fix" it.

As for the diff......I would be very surprised if after 13-14 years there is still an FJ out there with a faulty gear set.
 

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Exactly, I think the diff thing has been "blown" out of proportion and is no longer a concern.

The alternators commonly fail at around 105-130k miles from what I've seen. If you would like to perform some preventative maintenance and install a new one it wouldn't be a bad idea.
 
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