Noisy Reverse gear

[DAN682]

So straight cut gears are stronger than helical cut ones?

MUCH MUUUCCCCHHH Stronger.

You can get a Straight cut box with Synchro's too so you don't have to rev match at all. In our WRX we have done 1st to 4th so for highway driving, you can go to 5th and have the quietness of the Helical cut.

[Golf Loon]

Just dont go flat out backwards and change the oil for a special gearbox oil that quietens noisy gears.

Its the same box internally as Golf 3s and 2s, all of which have noisy reverse gears.

[chris.]

MUCH MUUUCCCCHHH Stronger.

You can get a Straight cut box with Synchro's too so you don't have to rev match at all. In our WRX we have done 1st to 4th so for highway driving, you can go to 5th and have the quietness of the Helical cut.

just to let you now helicel gear are acctully stronger as there is more tooth because of the angle
straight cut are just better to ingauge (ie. change gear quicker)

rex boxs just break due to people smashing them it to gears
so when they get the straight cut it allows them to change quick with out as much risk of it breaking

[craig_the_german]

Hi all,
went to change the g/box oil to see if it made any difference to the noisey/knocking reversed gear...found I couldn't undo the drain or refill plugs...needed a 17mm male socket...not something I had in the tool box.

have got one now from Repco, cost $18.50 but can now do the job this arvo.

[TassieGTi]

If its knocking in reverse there is damage to the teeth.This will eventually result in failure.020 boxes from the mk3 on had a very weak reverse gear set and its a common problem unfortunately.

[craig_the_german]

Hi all,
Well changed the oil in the g/box last night.
Gearbox is now smoother than ever before, the shifts are slicker than ever before but the reverse is still the same.

I can assume that from previous posts, this noise is common to the 020 g/boxes.

What is the solution, wait until it goes bang and then rebuild or is there a common fix that could prolong the life of the g/box?

It has made this noise for at least the last 35000km and possibly before (previous owner) but has gotten louder recently.

Can I still just drive is gently in reverse and get a reasonable life out of it or is it likely to go bang in the short term?

What is everyones experience on this?

Should it go bang or I decide to rebuild prior, who is recommended in brisbane?

Thanks and sorry for all the questions?

[torque]

Hi all,
Well changed the oil in the g/box last night.
Gearbox is now smoother than ever before, the shifts are slicker than ever before but the reverse is still the same.

I can assume that from previous posts, this noise is common to the 020 g/boxes.

What is the solution, wait until it goes bang and then rebuild or is there a common fix that could prolong the life of the g/box?

It has made this noise for at least the last 35000km and possibly before (previous owner) but has gotten louder recently.

Can I still just drive is gently in reverse and get a reasonable life out of it or is it likely to go bang in the short term?

What is everyones experience on this?

Should it go bang or I decide to rebuild prior, who is recommended in brisbane?

Thanks and sorry for all the questions?

Does it do like a bank noise when you put it in reverse or it is just whinning noise as you reverse ?

If the former, don't worry. I made mine much quieter with Redline MTL gearbox oil, that is the best there is.

If the first, let it go bang and then rebuild.

[Golf Loon]

If its just clicking, just be gentle going backwards and it will be sweet.

I have experience of 020 gearboxes rebuilding and the reverse gears are weak, especially in those Mk3 and 1.6 Mk4 boxes.

Its actually the same gear used in the Mk1 4 speed boxes and these never wear out, different steel, or less gears in the gate? I dont know.

I have known em last ages with noisy reverses and it probably wont hurt the rest of the box when the teeth sheer of the reverse gear. I`d wait for other symptoms before getting it rebuilt.

[D3bb4]

just to let you now helicel gear are acctully stronger as there is more tooth because of the angle
straight cut are just better to ingauge (ie. change gear quicker)

rex boxs just break due to people smashing them it to gears
so when they get the straight cut it allows them to change quick with out as much risk of it breaking

Are you for real? I'm an engineering student, and I've studied the manufacture of straight and helical cuts, particularly in diffs -and i can tell you that you're completely wrong