BlueMotion Gearbox (JDD) fitted into 1.4 TDI AMF engine

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I have bought a JDD gearbox, very excited to get it fitted.

One question; I know the oil required is vw's gearbox oil - G052512A2 but unsure to the quantity.... Is it 2litres?
Could any one please help

Cheers
Ross
 
rosscanning said:
I have bought a JDD gearbox, very excited to get it fitted.

One question; I know the oil required is vw's gearbox oil - G052512A2 but unsure to the quantity.... Is it 2litres?
Could any one please help

Cheers
Ross
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It's covered here - http://www.a2oc.net/forum/showthread.php?24732-Gearbox-oil-change-worth-it&p=194227#post194227

Regardless of the quoted quantity, with the gearbox installed, you just fill it until oil starts dripping from the filler plug

Cheers Spike
 
Hi All

Does anyone know if any improvements can be made to the petrol gearbox. Mine will probably need changing at some point soon and wanted to scope my options.

I am wondering if the same economy, reduced noise and lower revs at higher speeds can be accomplishes in the Petrol A2?

Thanks

Max
 
I am planning on installing a JDD box in my newly acquired A2 TDI 75 hp, as it badly needs a higher gearing, and coming from an A2 3L I know how much more relaxed and comfy the car can be with some longer legs..

I know that in this tread Zoltar installed a JDD box from a Polo Bluemotion, but also that the JDD box was used in both Skoda Fabia and Seat Ibiza. So before I go buy a secondhand JDD box, I am just wondering if it has the same ratios no matter what model it has lived in, or if the Bluemotion version has different/longer ratios.?

So in short, can I use any JDD box, or should it specifically come from a Polo Bluemotion.?

Thanks - Alex.
 
Hi Alex,

My JDD gearbox is from a Seat Ibiza Ecomotive.

So I believe you can use a JDD from either of the three. skoda, seat or vw.

Please if there is any one can confirm this with me, so Alex can be 100% confident.

Hope this helps

I have travelled nearly 30K now with my JDD.

Ross
 
motosport said:
I am planning on installing a JDD box in my newly acquired A2 TDI 75 hp, as it badly needs a higher gearing, and coming from an A2 3L I know how much more relaxed and comfy the car can be with some longer legs..

I know that in this tread Zoltar installed a JDD box from a Polo Bluemotion, but also that the JDD box was used in both Skoda Fabia and Seat Ibiza. So before I go buy a secondhand JDD box, I am just wondering if it has the same ratios no matter what model it has lived in, or if the Bluemotion version has different/longer ratios.?

So in short, can I use any JDD box, or should it specifically come from a Polo Bluemotion.?

Thanks - Alex.
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Ref attached post - http://www.a2oc.net/forum/showthrea...at-11-onwards-MYP-gearbox&p=204449#post204449 it's important to check if your current gearbox uses the plug-in speedo drive sender. If so, you may struggle to sort out a method of getting the speedo to work

Cheers Spike
 
Spike,

I thought this potential issue with speedo drive only is relevant with the 6-speed MYP Passat gearbox, and not the older JDD box..?!? I noticed in this tread that Zoltar's car is the older model like mine, and therefore there was no problem with speedo drive on the JDD box.. But maybe I stand corrected.?

Regards - Alex.
 
Although I've not yet had the chance to test it, I'm fairly confident I've found a way to get older instrument clusters from early A2s to pick up the speed signal from the ABS system (like on later A2s) rather than from the gearbox speedo drive. This would allow earlier A2s to have any physically compatible gearbox fitted, as can be done with A2s from 2002MY onwards.

Spike, you don't fancy lending me your A2 as a guinea pig, do you!? :)

Cheers,

Tom
 
motosport said:
Spike,

I thought this potential issue with speedo drive only is relevant with the 6-speed MYP Passat gearbox, and not the older JDD box..?!? I noticed in this tread that Zoltar's car is the older model like mine, and therefore there was no problem with speedo drive on the JDD box.. But maybe I stand corrected.?

Regards - Alex.
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Hi Alex

It's just something you need to be aware of - and the first check would be to see if your gearbox uses the plug-in speedo signal generator.
Although the JDD box has been around for a while I suspect it won't have this facility. It may however use the old casting with the speedo drive blanked off, allowing the drive to be retrofitted.

Just reading Tom's mail, he may have the neatest solution by enabling the speedo to pick up a signal from the ABS system

Cheers Spike
 
Thanks, I will pay attention to the speedo signal drive and check it out before buying, but I do feel confident a JDD box will work with my 2002 car, as it worked perfectly in Zoltar's early 2001 car.

I would however, still like to get confirmation on whether all JDD boxes have same ratios and therefore will work as intended, or if the Bluemotion/Ecomotive version has different/longer ratios..?!?

And Tom, that is very exciting news, so please do tell more...!!! Because I would like to have the 6-speed MYP box in my car, but found out it was not possible on my 2002 car, as it has a different speedo drive signal.. And if you need a guinea pig I am happy to do the drive across the pond so you can play with my car.. And perhaps also install MFSW, RNS-E, and perhaps some other goodies...

Alex
 
Still no one who has an answer to my JDD box question..?

And Tom, please elaborate more about your findings on getting the older cars to read the ABS speed signal.. That will open up more options, not least a more affordable 6-speed option with the MYP box..

Alex.
 
motosport said:
Still no one who has an answer to my JDD box question..?

Alex.
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Hi Alex,


JDD is the designation code for the VAG longer ratio gearbox, all versions will have the longer 3rd, 4th and 5th ratios.
Like Ross, I also used a JDD from a Seat Ibiza Ecomotive and not from a Bluemotion as the Ibiza version cost £250 while a Polo version was £400 at the time of buying/fitting!
I had compared both the Ibiza and Polo versions in the salvage yard before buying and they looked the same with regards to size, brackets etc. so I went for the cheaper option of the two :)

Also sold my old EWQ gearbox for £200 so the total extra cost of the change to the JDD ratios cost me just £100 in the end, also bear in mind the the difference between the 6 speed MYP and 5 speed JDD will be having 3rd and 4th gears on the MYP instead of just 3rd on the JDD, gears 1st, 2nd, 5th(equal to 4th JDD) and 6th(equal to 5th JDD) will be roughly the same.

The MYP would give you greater flexibility between 25mph and 50mph when you go town/cross country due to more gears to play with, but if you don't spend a lot of time in that speed range and you are wanting the ratios purely for saving on the high speed motorway cruise then the JDD should suffice.
 
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Out of interest, how many people have fitted the JDD and what are your experiences with MPG etc?

Cheers
 
I have experience of the JDD box before I opted for my 6-speed conversion. It did not really suit my general driving environment. I have a lot of lane-work near my home location and I found

that even 4th gear was sometimes difficult to hold. It was good cruising, though. 70MPH was equivalent to 2,100 RPM. The 6-speed box is perfect, because you keep the first, original 5

gears. I feel that the best compromise was what I had r tried before the JDD box. That was to change the 5th gear for a different ratio. I chose a different ratio to everyone else (0.168, I

recall, but I may be wrong). Anyway, it seemed to suit the car very well, reducing the top-gear revs by a few hundred but still giving good 5th gear acceleration. You could still engage 5th

gear at a reasonably low speed, too, without too much of a gap between 4th and 5th gear. For not too much cost, that's what I would recommend to A2 owners, based on my experiences.

If you've got lots of cash and intend keeping your A2 for quite a while, then go for the 6-speed conversion. I am not going to recommend the JDD box, though, unless you are mainly going

to be using motorways. If you want to read further about my gearbox experiences, you can find it by searching the Forum.

David
 
Thanks for this great info, just what I was looking for..

David, I might have to have a second think about this.. I hear what you are saying about the JDD ratios vs the 6-speed, and to be honest I would prefer the 6-speed. However, I do also feel that the JDD box should work well as I have driven an A2 3L quite a bit, and even with less power that car has no problem with pulling the longer gearing, which ratios are almost identical to the JDD box, if I have understood it correctly. In fact, the 3L car feels much better geared with a more relaxed and comfy drive, less shifts and not having any problems pulling the gearing at all.

I do mostly freeway and country roads driving, with maybe 20% city driving, so it should be fine. I do agree though, that when driving on the freeway now, I really want to shift into that non-existing 6th gear once i reach cruise speed, so naturally a 6-speed box would be a good choice. And if Tom has come up with a way of making our older cars read the ABS speed signal, it has become much more affordable to have a 6-speed box, as the MYP Passat box can now be used.

What are the experiences of other people who has installed a JDD box in their A2.? And those of you that has the JDD box in your car, do you all have a remap as well.? I am planning on getting a remap first with the best tuner here in DK, and I will emphasize that I want a broad spread of torque starting from as low as possible more then high HP. That usually gives the best driving experience in my opinion.

Alex.
 
motosport said:
However, I do also feel that the JDD box should work well as I have driven an A2 3L quite a bit, and even with less power that car has no problem with pulling the longer gearing, which ratios are almost identical to the JDD box, if I have understood it correctly. In fact, the 3L car feels much better geared with a more relaxed and comfy drive, less shifts and not having any problems pulling the gearing at all.
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The 3L is tuned, unlike 1.4tdi's, to give maximum torque at quite low revs to enable early up changes.

RAB
 
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