Well I have owned my Runner for 11 months and was going through the service records of the previous owner and I can't find when the diff fluids were last changed so I figure it's time. A couple questions about synthetics
1) What is required to switch as far as flushing or can I just drain what's in there and fill it back up.

2)My manual calls for 75W-90 GL-4 in everything except the rear diff which calls for SAE 90. Curious what Redline's equivilent to that is?

3)Lastly I don't want to switch my engine oil because there's no way I am paying $40 in oil everytime I change it, my Quaker State works just fine. Is it okay to have synthetics in everything but my engine or should I stay uniform?

Thanks DAJABR for giving me the ambition to spend some money on TLC for the runner instead of bolt on mods.

Thanks

 

Anyone? I know there are people on here running synthetics

 

Sorry, I have been gone for the past 4 days and have not posted. I use synthetic in the motor and dino in the transfer/tranny/diffs. I see no problem with having dino oil in the gear boxes and synth in the motor. On an old rig like mine I think synth in the tranny might make the syncronizers too slick to work right resulting in gear grinding, I know some Jeep guys that have this problem with synth tranny oil. But Jeep trannys are $#!t, in a Toy who knows, I don't want to find out the hard way so i'll stick with dino. In the rest of the truck I would use synth. I just changed all gear oils last Monday and put in dino just because I had 2 gallons sitting around. I wanted to use it because I had already opened both gallons. Next time I will put synth in the diffs and transfer.

On how to get the old out, just get the old stuff as warm as possible so it will flow out faster. Then open the drain and let it go as long as reasonably possible, even after an hour or 2 there will still be a constant drip happening. Its no big deal, there is no way to get every drop out of a tranny, diff, etc. Once 99% is out its ok to add the new synth. Heating up the new oil before pumping it in will make it much easier to pump. I get the hottest water I can get from a tap and put the bottles in the hot water.

 

I seem to remember some discussion a while back on 4x4wire that a few folks were having trouble with constant leaking rear seals after switching over to synthetic gear oil. Some were older, higher mileage trucks and some were newer ones. Not sure of the validity of it all, though...

 

I knew someone on here knew something on this subject. Thanks Matt. I got to thinking and what do you guys use to get oil back into the diffs through them little bitty fill holes? I am sure there's a pump or something similiar eh?

 

I just put new gear oil in my transfer cases and diffs this summer, so they don't need replacing yet. However, I was also considering going with a synthetic gear oil in my diffs next time I replace them.

So, you don't see any downsides to using synthetic gear oil in the diffs (other than the more expensive initial cost)? Is it really going to protect and lube the diffs that much better? I'm just trying to learn. Thanks guys-

Oh ya, if it makes any difference at all, I am about to hit 100K on my runner.

 

There are a couple of ways. Most shops buy in bulk and have have a pump that fits on a drum. If you buy it in 5-gallon buckets, they also make pumps for those. I usualy get it by the quart, in those tall skinny quart bottels with the pointes cap. What you can do is get a 12 to 18 inch piece of clear vinyl hose, about 3/8 inch in diameter, and slip this on the end of the pointed cap, after you have cut the tip off. This lets you sqeeze it pretty easily, because sometimes you can't quite get those bottles in the right position to put fluid in.

 

Jayson thanks man I had something like that pictured in my head. You just confirmed my daydream

 

Great minds think alike, I guess...

 

I know that i have to repcace my fluids can any one tell me how much tranny fluid i would need and what type?

 

Do you have an auto or manual tranny? If you have a manual, you should use 75W-90 gear oil (I believe), but I don't remember the capacity for it. Check your owner's manual to be sure

 

Mark give me a call sometime and I'll give you the specs off my new high speed CD manual! CTB he's got an auto with the turbo diesel.

 

Sorry its been a while but i have not had the time to check my e-mailsbut thanks for that I will give you a call re the cd