Changing & checking the trans-diff oil...

takza · Post by **takza** » Sat Dec 25, 2004 6:23 pm

Winter GEAR OIL REPORT:

This just in.......

...with temps down around and below ZEEEEE-ROW.....I'm not seeing any problems with the "40% 75W90 synth and 40% 85W140 regular gear oil with 20% Hyperlube Racing Formula additive" MIX I'm using. This stuff is thicker than just 1/2 of the lighter and heavier oils...cause the Hyperlube stuff is really thick.

Having no real trouble shifting cold...just seems thicker as you'd expect.

I've driven some manual shift cars in these temps where I really had trouble shifting in cold weather.

Still have the need to double clutch to get into first at times when cold...but had this with the ALL 75W90 gear oil.

Typrus · Post by **Typrus** » Sat Jun 25, 2005 11:12 pm

Bump bump bump it up!

Mac · Post by **Mac** » Mon Jul 04, 2005 11:10 pm

I like to stick with what the manufacturer recomends for gear oil, i'll use thicker engine oil in an engine to slow leaking/burning, but trannys rarely leak, and little if they do.

synthetic gear oil is nothing but trouble IMO, my buddy put it in his truck, made it shift hard and grind, i put it in my echo, same thing. it seems to lubricate a little too well, making it so that there is not enough friction for the syncros to work propely.

we put 85-140 in my freinds diff in his FIAT because the manual called for a super thick oil and holy crap that stuff was thick, poured like molasses.
the only reason i'm not going to use it is because the tercel shifts fine with 80W90, but for an abused tranny or something with alot of miles, its probably not a bad idea.

dcn · Post by **dcn** » Sat Mar 25, 2006 8:56 am

Do you guys have any tips for filling the fluids back up after draining them? I know it takes longer than it should but is there a container or some other method for pumping it back in that works well? We're doing mine today plus repplacing the forward section of the exhaust and putting new inner tie rods in. Anywhere we can save time would help. Sorry to ressurect this thread..

Typrus · Post by **Typrus** » Sat Mar 25, 2006 12:09 pm

Thats why these threads are here...
I'd recommend a gear oil pump. Siphon systems take hours sometimes, but keep in mind hand pumps will tire you out, as gear lube is THICK.

My suggestion would be to run a good cleaner coupled with some el-cheapo Wal-Mart gear lube for 500 miles then put in Amsoil. I was doing that, minus the cleaner, and my 500 miles has turned into more like 5000 with the crappy stuff in there.
$$

dcn · Post by **dcn** » Sat Mar 25, 2006 3:33 pm

We got it all done, pretty miserable job trying to fill those things up from below like that. Car shifts verrry nice now though, and it is tight in the front end as well.

takza · Post by **takza** » Sun Mar 26, 2006 3:39 am

I tried using a washer motor as a pump...works but is slow and the motor overheats.

New idea is to use one of those 12V air pumps and an old washer fluid gallon jug. Holds the 4 qts.

Carefully drill some very tight fitting holes in the lid for some vac or fuel line tubing.

Air line goes in and stops right under the cap...oil line out from the bottom of the jug that goes to the trans. Use silicone caulk to seal.

I'm also using the clip end from one of those manual pumps to hold the end of the hose in the trans.

Put the oil in...put the oil line in the trans...turn the pump on...watch the magic. Might want to watch the pressure though?

dcn · Post by **dcn** » Sun Mar 26, 2006 11:44 am

Good idea, should have posted sooner, we might have used that tip. Between the new gear oil, and tighter front it's like a new car. Like it a lot.

Soutthpaw · Post by **Soutthpaw** » Tue Apr 18, 2006 8:49 pm

if you ever get a manual tranny in a vehicle that is hard to shift in cold weather, try changing to a full synthetic gear oil and you will probably notice a tremendous improvement... I have done this on several vehicles. Synthetic oils hold their viscosity at temperature extremes better than dinasour oils... It a cheap and easy fix for hard to shift trannys

Mac · Post by **Mac** » Mon Apr 24, 2006 2:47 am

in my echo i'm running Redline MT-90, expensive, but well worth it!

full synthetic, and actually made my shifting better unlike the synthetics i had used before, acceleration improved too.