Re:Re:2012 Jimny Gearbox

From what's been said above its sounds like your gearbox is standard.  As said start by changing all the gear fluids, another excellent idea as you know it's been serviced. Also have a look for any debris in the oil, which should be clean in colour and look as good as new.

After this I would just try and get a ride in another standard Jimny and see if yours sounds different, if not then just accept that's the way it sounds.

You description would fit with my gearbox, straight cut gear sound mostly prominent in 2nd and 3rd, reducing until silent in 5th. However we are all individuals, what's noisy for one will be quite for another.
I know my gearbox is in excellent condition and it's very quiet. It's just the way I would describe the sound of my Jimny through the gears, but that's not saying the sound you can hear is the same. 
You don't want to be taking it apart unless you are certain you actually have a problem, things get expensive that way. 



 

Busta wrote: They would be noisy in all gears, not just 2nd and 3rd.

Good point Busta, is it true the later manual gearbox is more prone to wear, be interested to see if there is shiny bits in the oil

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They are normally reasonably quiet gearboxes, you can however get noise from the transfer box.

That model of gearbox suffered wear problems and failures up unitl around 2008 when the issue was corrected in production so you should (hopefully) be immune to that. Also the initial symptoms of the original gearbox failure would have been noise in 4th and 5th.

I would first take a look around for a broken mount, either on the transfer box or more commonly the rear engine mount. The rear engine mount is badly named, it is in fact on the rear of the gearbox, hidden up in the remote linkages. This frequently fails but is hard to see as its "resting" position makes it look fine, you have to stick a large screw driver by the mount and try and lift the gearbox using the screw driver as a lever. If the gearbox lifts you will see the mount split into two.

If everthing looks ok and you think it is the onset of wear then you could put a blob of lithium grease in the gearbox.

If you want to hear what "straight cut" gears sound like in a Jimny I can send you a recording of my transfer box

 

I had a problem changing my gearbox oil because, as you say, the filler plug is very difficult to get at. I removed the carpet from the side of the transmission tunnel, and after some very careful measuring cut a 30mm hole through the tunnel and fitted a rubber plug when I’d finished. Refitted the carpet. Very simple to do and makes changing the oil a lot easier.

mlines wrote: They are normally reasonably quiet gearboxes, you can however get noise from the transfer box.

That model of gearbox suffered wear problems and failures up unitl around 2008 when the issue was corrected in production so you should (hopefully) be immune to that. Also the initial symptoms of the original gearbox failure would have been noise in 4th and 5th.

I would first take a look around for a broken mount, either on the transfer box or more commonly the rear engine mount. The rear engine mount is badly named, it is in fact on the rear of the gearbox, hidden up in the remote linkages. This frequently fails but is hard to see as its "resting" position makes it look fine, you have to stick a large screw driver by the mount and try and lift the gearbox using the screw driver as a lever. If the gearbox lifts you will see the mount split into two.

If everthing looks ok and you think it is the onset of wear then you could put a blob of lithium grease in the gearbox.

If you want to hear what "straight cut" gears sound like in a Jimny I can send you a recording of my transfer box

 

Hi Martin I've just seen a YouTube video of you driving your jimny I see what you mean about the straight cut gears can't mistake that for anything else

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wrote:

Hi everyone. So I got another question for you guys.

My Jimny has a gear whine, whenever I drive, so this made me wonder whether the 2012 model perhaps had a gearbox with straight gears, as the are noisier than the modern gearboxes with bevell gears. Does it have straight gears? Or may there be a cause to this whine? I changed all the diff oils, except the gearbox ane transfer case as the transfer case had sufficient oil and gearbox was to hard to reach the plug and I don't know how I'll fill it back up in that stupidly small space. 
Anyone that can help me please? Shed some light on the situation for me?

Thanks again,
Stefan
 

An old topic I know, but I found this because I was searching for the same question.  Last month I was lucky enough to find a second hand 2022 Jimny with 800km on it.  It is basically new. 

I've noticed a whine in the manual gear box in 2H that sounds for all the world like straight cut gears.  It even has the pitch chatter if you balance it round about zero force (think of a normal car in reverse accelerating, maintaining speed, then decelerating.  You get that little chatter just on the changeover point.

Helical cut gears also require thrust bearings because some of the force is axial.  This increases the complexity of the gearbox.  The Jimny is designed to be simple, cheap and tough, so I'm wondering if Suzuki made a very clever decision to go with straight cut gears on at least some parts of the gear box (like the input shaft for example). 

Only a mechanic who has worked on them, or someone with access to the workshop manuals would know for sure.

Why don't some people notice it?  Well if you habitually drive with the radio on, you many not hear it, and even if you do you might not think anything of it.  I happened to be studying the difference between straight and helical cut gears recently (for another project) and suddenly realised what the sound was.

C

wrote:

Only a mechanic who has worked on them, or someone with access to the workshop manuals would know for sure.

 

Further on this, I managed to find a workshop manual for my GB74 manual transmission and all gears appear to be helical cut according to the illustrations.

So

Are you not hearing whine from the transfer box?

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