Should I overhaul the gearbox or just get a 2nd transmission to replace?
The problem is that reverse gear all of a sudden doesn't work. The other gears are fine.

Any recommendations for gearbox repair shops? I looked up a few near to Subang/PJ like Gearbox repair Malaysia Sunway, Wintech Auto. Has anyone got any experience with them or any other recommendations?

Just get the half cut replacement. Rebuilding a/t is expansive af

I was quoted $1000-1300 estimate for 2nd hand (all in price), only warranty for 2 wks. Rebuild from those 2 places in my previous post was $1800 with 6 months warranty. Cheapest was just repair the reverse gear for $900.

Usually replacing gearbox is expensive. However, since myvi halfcut is easy to get and super cheap, it make more sense to replace it instead.

For halfcut, I read you can get it for less than RM500. So the workmanship is like more than the part itself. This is fine as it is a lot of work. Try to get more warranty for it. 2 weeks is too little for warranty.

If you opt for repair, all the rubber seals need to be changed since already open the gearbox. So it's better to overhaul and repair.

Is better to get a half-cut gearbox and change it.
Repairing it does not also guarantee it will be as good as new and many case got some minor issues after repairing. Even my mechanic can fix gearbox also recommends me to get half-cut condition gearbox from Japan.

similar prob to my myvi. rebuilt roughly 3k with 6 month warranty. then i sell it off. perodua service advisor said its common to myvi especially lagi best generation. 1 in 100 have this issue.

What's the real issue (of breakdown) with this myvi reverse gear problems ?
Gears, bearings ? or
Control valve problem ?
Just curious .

Sorry necro abit. I got this problem where I accelerate but gear hard to change and will have jerking. Change into R also not responsive. I just changed my ATF during my last service.

What year is your Myvi and what ATF did you put in? Sounds like you might've used the wrong fluid type or you took too long between service.

2014 myvi lagibest. I forgot the type of ATF though. I think it is too long between service caused it.

It takes D3-SP, or SP-III in general. If I were you, I'd drain it and fill it with genuine D3-SP, or even those multi-ATFs again with filter change, see if the shifting improves. Hope your trans gets better.

Thanks for the advice man. Appreciate it.

Is it like the rpm dropped a bit during acceleration? Then slowly ramp up again?
My wife myvi 2007 hv this issue also

Bit if I drive slowly ramp up, its ok
If ramp up fast, then this happens

Is it possible that this case need to do atf flushing?
Normally when we change atf oil, some old portion still remain?

Abit similar. The rpm will keep increase as if no register the next gear. Supposedly when u hit 3-4k rpm it will auto shift into next gear, but mine will revved? Then the speed keep register at 50 like that

If your ATF is damn dirty & long time no change, it is not recommend to flush but frequent change of ATF oil at shorter interval (if original 20k, reduce to 10~15k change)
Many case after flushing will cause more harm to the gearbox body valve as during flush small debris or metal shreds will flow thru and stuck in those sensitive solenoid vales gg gearbox.

The best way is open out the lower gearbox oil pan, clean all the debris or metal shreds in the oil pan & under the gearbox surface, change the ATF filter/strainer and pour in new oil.

Since you are not totally open out the gearbox and clean internally, sure there will be old oil in it. With shorter interval and frequent oil change, the older oil can still be mitigate with newer oil mix

Yea, you r right, so far mine always change between 20-30k.
Normal standard atf oil change, workshop wont open & clean the oil pan debris?
Normally i always change the atf filter when change atf oil


Not sure myvi car manual calls for any flushing at any mileage?

Oh, then urs maybe worse, like couldn't engage the next higher gear? Then highway ma continue 50km/h only 😂
Mine is can go higher gear, but in between it has to slowdown for 1-2 sec before engaging
If i accelerate slowly then no such problems

No, normal workshop only change ATF oil unless you request to change the ATF filter/Strainer.
It is a good practice to open the lower oil pan to clean all the stuff once a while like example 100k or 5 years at least 1 time.
There is no flushing service call out for Myvi, most of these flushing service is roadside mechanic shop way to earn more money.

This could be the case?

https://vt.tiktok.com/ZSeo6yFTa/