Differential fluid change

[icantsee]

BTW my MPG went up by .7 after changing the diff fluid.

I was speaking to a fella in parking lot that also has a 4R. He told me that ever since he put synthetic motor oil, his MPG went up at least 2MPG.

 

[icantsee]

Re: Torque Values

Yeah, 48lbs seems a bit much. I think I'll just go with about 30lbs myself.

SHock-D

Check this link: http://www.4runners.org/articles/difftsf/

That's a great find...thank you!!

I saved that link & going to refer to it when it's time for me to replace my fluids.

 

[toybox]

Re: Re: Torque Values

That's a great find...thank you!!

I saved that link & going to refer to it when it's time for me to replace my fluids.

Note that this write-up was for a 1997 4Runner and most likely the capacities, bolt sizes, torque settings, etc. could very well be different and most likely are.

 

[icantsee]

Thank you toybox for the reminder!!

I was overexcited about the write up, I didn't read it thoroughly, I just saved it for future reference.

 

[jharris2]

My manual says 48 fl-lbs for the drain plug and 29 ft-lbs for the filler plug.

 

[Coolhand]

Hey guys -

Haven't posted in a long time. I'm finally at the 30k miles point and was a bit overwhelmed by how much work was required. I was contemplating going to the Stealer Until I read these threads.... thanks for all the info! :awais: I'll give it a shot.

J

 

[bbyrd]

did my rear diff today. Accepted just over 3 qtrs of M1 gear oil. Next oil change plan to do the front and transfer. It is alittle messy but next time I plan to clean up my process....

Thanks to all who posted on this thread, you helped me alot with this...:biggrin2:

 

[nc211]

Newbie here, just picked up a 2005 4runner with 51k highway miles. It is the SR5, with teh V8. I'm a former LS400 owner, quite handy with the wrench. Going through the book last night, I found 0 enteries for the maintence logs. The previous owner had it for about 18 months, in Ill. Judging by the normal wear and tear items, it's pretty clear the miles are highway cruising miles. But, I'm doubtful the diff fluids were ever changed, or transfer case. Planning on doing this very very soon. I know this is a toyota, dang near bullet proof, but 51k on the original gear oils seems quite excessive....should I be worried at all?

 

[RickyCRX]

I bought mine with 52.8k, also a V8, also mostly all highway miles and I don't think either had been changed since new... I changed the rear diff and tranny to amsoil synthetic at that point in time and have had no problems. I'm now over 92k with a decent amount of towing and have yet to change the fluids since my initial change. I'm planning to do the rear diff and tranny again around 95-100k, though.

Ricky

 

[nc211]

that makes me feel better! Thanks!

One thing I'm not to crazy about on this 05' is the "sealed tranny". According to the dealership, there is a drain plug, and a refil plug on top of the casing, but no dipstick and such. I'm big on the tranny fluids in my cars.

 

[MikeInNH]

Do we need to add lsd additive to the rear diff oil when it is replaced?

If you use synthetic oil...then no. If you use conventional then yes.

 

[RickyCRX]

If you use synthetic oil...then no. If you use conventional then yes.

Huh?!

4th gens don't have LSD's. They have the "electronic" LSD which works by grabbing the brakes on the wheel that slips to help try to transfer the power to the wheel that has traction.

You shouldn't need additives no matter which type of diff fluid you use.

Ricky

 

[Koz]

4th gen 2WD have a LSD and would need the additive if changed.

Koz

 

[RickyCRX]

Have they always had LSD's on the 2WD models? I've actually gotten my 4Runner stuck once when one rear wheel was firmly on the ground and one had very little weight on it due to being on a very highly sloped piece of ground. I had to push the vehicle off, since it wouldn't move under its own power.

Ricky

 

[Koz]

Have they always had LSD's on the 2WD models? I've actually gotten my 4Runner stuck once when one rear wheel was firmly on the ground and one had very little weight on it due to being on a very highly sloped piece of ground. I had to push the vehicle off, since it wouldn't move under its own power.

Ricky

LSD will not work like (as good as) a locker.

Koz

 

[MikeInNH]

Do we need to add lsd additive to the rear diff oil when it is replaced?

Not if you use synthetic.

 

[Koz]

Not if you use synthetic.

Even when using a high quality synthetic gear oil the limited slip differential could still chatter and an additive would be needed.

Koz

 

[J.A.]

Here is my 3rd gen Synthetic Fluid Changeover write-up.

 

[fun4runner]

For the 4wd models: drain plug 48 ft-lbs & the fill plug is 29.

For the 2wd models: both are 36 ft-lbs.

This comes from my 2003 Factory Service Manual.
I believe that 48 ft-lbs is a lot, so I just torque them both at 30 ft-lbs. I used the fiber washers rather than the metal crush rings.

You can just use some common sense on this for those that do not have a torque wrench.

gurus,
i am new to this stuff, how do you screw the nuts to the specified torque values (torque wrench ??)

 

[testrider]

Anobody else use Seafoam in their crankcase?

I used Seafoam in my gas but never in engine oil.