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Discussion Starter #1
Hey Everyone! I was needing some input. I have an 07 FJ A/T with a 6" pro comp lift and 35" tires. I have noticed this grinding noise mostly when I let off the accelerator. I used to be a service manager at a dealership (mazda) so I took it there to put it up on the lift. Definitely a little play in the rear outer pinion bearing and a TON of noise coming from the rear diff.

So then took it to my local Toyota Dealership where believe it or not...THEY DON'T CHARGE DIAG!! wow! They quoted me $4335.00 for a new carrier assy, and both rear wheel bearings and axle seals! I know for a fact that there is NO noise coming from the wheel bearings because I had a stethoscope on both rears.

Long story getting shorter...called 4 Wheel Parts and they said they could rebuild my rear end with a master rebuild kit and new ring and pinion for around $850.00...now for they questions,

1. What ratio are the stock gears?
2. I know a lot of you have had to replace your rear diff...what repair procedure did you use?? rebuild? salvage? (where the hell did you get it, cause i cant find one!!)

Thanks so much for any help!! Hope you all have an awesome weekend!

--Cody:cheers:
 

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Discussion Starter #2
Any help? I really need to get this resolved as quickly as possible. This is my daily driver and I dont want to drive it the way it is...

Thanks Again.
 

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How many miles on the FJ? If under 60k you should be covered. Since you have 35s you might just look into upgrading your gears to a more suitable ratio and take a lot of stress away from your other components. Look up east coast gear supply, you can order assembled thirds from them for an easy do it yourself install.
 

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Discussion Starter #4
How many miles on the FJ? If under 60k you should be covered. Since you have 35s you might just look into upgrading your gears to a more suitable ratio and take a lot of stress away from your other components. Look up east coast gear supply, you can order assembled thirds from them for an easy do it yourself install.
I have 64,000 miles on it so no warranty...=(
 

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The 5AT's come with a 1:3.73 RAR.

DEWFPO
 

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Discussion Starter #7
Looks like we have a very similar setup (ie. mt6, procomp lift, 35" tires). I experienced something pretty much identical to what you're describing. However, this could be something totally unrelated. Here's my post, continue reading for my solution:
http://www.fjcruiserforums.com/foru...s/104028-noise-when-coasting.html#post1609349


PM me if you have any questions.
Thanks for the info!! that was a lot of good info to know! Mine is a A/T though which is part time 4WD if im not mistaking. So I dont think that would apply to me.

Quick update...Did a rear diff service in my garage and lone behold...no metal shaving at all...just the usual crap on the magnet. That kinda spun my head out a little. No I really have no clue whats going on.

If it was the pinion bearing, shouldn't it make noise all the time?? It only makes it when I take my foot off the gas. And it doesn't matter how fast I'm going. And it almost cut out for a sec then starts up again???? WTF!!!! LOL!!!!

New ring and pinion from toyota is $912 (not including labor)!!! oh boy...not happy and so confused.:boohoo:
 

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When my rear end went out I desided to replace it with a full rebuilt 3rd memeber from ECGS. Easiest way for DIYs they have a 5 year waranety also! I went ahead and upped the gear size and replaced the front cam shell too, as I run 35s, might be a good idea for you too ;)

looking for metal shavings isnt always going to show you whats wrong, it needs to be pulled and painted to see where the problem is!

Drivetrain Specialists East Coast Gear Supply
 
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