I own a GD1 and GE8. My GD1 is about to change the gearbox oil. Do I need to add a coolant as well? I heard some people say said no need coolant and some said need a coolant.

 

Coolant, in the radiator, such as water, with an additive, for water pump lubrication would be advised.

 

alrite, tqvm. is there any jazz owner here installed atf cooler such as works-engineering or koyo?

 

I, for one, need some clarification on this.

USDM Fits have no "gearbox coolant." They have gearbox oil.

The only transmission "cooler" that I can conceive of would be a radiator that circulates the transmission oil. No "coolant" involved in such a set-up.

So, what are we talkin' about guys?

Thanks.

 

I use a pint of grape jelly blended with some MT90

 

Please tell me I am not the only one that has no idea what the OP is trying to say or ask

 

 

whoever told you to get coolant for your transmission, please push them off a bridge if they are in the business of helping people with cars

 

I think we may be missing in his use of English. He is from Malaysia. First he uses the term "gear box". I'm not sure he really has a Manual Trans. He may be changing the AT fluid or the MT fluid and asking if is also time to change his engine anti-freeze.

It is just a guess at this point.

 

Indeed, I think there might be a slight language problem here.

Let's help the man out with clear, simple replies.

 

You do not need a coolant.The gearbox has no need or means to be cooled. Its not a vehicle rounding Talletaga at 200 mph.

We have at least 6 cars here with 200,000+ miles; none have changed gearbox oil from new and they run great. Rumors continue that replenishing the gearbox oil has resulted in problems. Have you located the inlet and outlet for coolant? Only some trailer towing packages for trucks have coolant systems for transmissions and Fits aren't trucks. Well, OK sometimes they're little trucks but transmission cooling isn't needed.

 

That seems ill-advised.



Another odd piece of news. Replacing the OEM oil with OEM oil shouldn't do any harm.



Note: Oil is not oil. Oil is a mixture of a base plus additives. When the additives wear out, you need to change your oil (even if the base oil is still fine). Also, oil in automotive applications suffers contamination. Dirty oil is not an effective lubricant.

 

Yeah guys I think he's talking about Auto transmission fluid cooler, not "coolant" like antifreeze.

I wouldn't worry about it unless you're planning on towing or circuit racing, then it might be a good idea to get a bigger unit. I'm sure any trans oil cooler made by Koyo would be a quality unit.

 

I think at this point anything is possible for what he is asking.

Either way, I am interested in if anyone has ever added an aftermarket transcooler? I do it for any Jeep that does not have one, towing or not towing. But that also depends, what temps are people seeing on the output of the trans?

It should also be noted, that keeping the fluid too cold is not great either. Believe it or not. At best the output temp on my Jeep trans is 160, meaning the fluid coming out after going through the trans is 160. I wish I had put in two temp gauges, one for the in. In the winter, while driving, it is lucky if it gets to 120. And this has caused other problems.

But yeah, after 100k, I change the fluid every other year at least. It really doesn't cost that much to do. But I would be interested to know if anyone has ever added an aftermarket transcooler for normal driving.

 

Indeed. That's the whole idea behind a mixed weight oil versus a straight weight. Lubricants have to be at the right viscosity to do their job. Viscosity is determined by weight and affected by temperature (to oversimplify a bit).

Cheers.

 

Use a thermostat on the line?
Hayden Automotive 163 Oil Thermostat/Bypass

 

Sorry for any unclear and any bad English language I used. Yes, I did ask about gearbox coolant because I did found about Honda Anti-Freeze Coolant Type 2. So, some of you replied there is no need coolant in the gearbox but there are aftermarket ATF cooler manufactured by several well-known brands. Thank you for the reply from you guys. All of you made my head clear from this "gearbox coolant".

I travel with my Fit/Jazz a lot. Almost 200km a day. So this guy asked me to find a good coolant for my gearbox and as far as I know, I never heard about gearbox coolant but I have heard about works-engineering and koyo ATF cooler. So this cooler will help my gearbox to perform better.

I have another question. How ofter do you change your gearbox oil, doesn't matter if you have GD or GE model?

 

You don't want to cool it off too much, the ATF needs to be in a certain range of operating temperature to do its job.

 

This is true. For all lubricants.

 

First, let's clear up a very important point: There are oils and antifreezes.
DO NOT PUT ANY KIND OF ANTIFREEZE IN YOUR GEARBOX. NEINE !!!!
Antifreeze compounds are not good lubricants and your gearbox will be harmed greatly.
Use only transmidssdion LUBRICANTS or OIL
There are cooling devices for gearboxes, primarily on those that are used to haul trailers, aka caravans and such, but Fits/Jazz isn't one of those.
You do not need any kind of coolant in your transmission, only gearbox oil. There are numerous synthetic transmission oils to choose from.