Which gearbox?

I've got a 2001 remapped 75, with a single occupant for 99% of the time
My journeys are 5% town, 15% b-roads and 80% major routes

Sound like it should work for me
I think the A2 ewq gearbox is too low gearing as standard......hmmmmmm

J
 
It sounds like there's only one answer :D



(Followed by a change of turbo etc to get ~130bhp, followed by a 6sp conversion on the BM box :p ).
 
I'm running 205/50r16's in the summer so I'm already changing the gearing a little, and still feel the a2 is low geared

I feel a like there will soon be a blue motion gearboxed A2 around soon

Looks like it'll cost around £500 all in.

Might have to keep it after all

( also spent the last 2 days in my TT and if I drive a fast car every day I'd be either arrested or killed)

J
 
Having looked at the the graphs a bit, I think this could be a really good mod. Go for it, Jason.
Based on the graphs made by nuttinnew (that website's an excellent find!), you'll drop 169 revs at 70mph due to the longer final drive, and a further 92 revs due to your larger tyres; so 261 revs in total.
For comparison, longer 5th, without a change of tyres, loses you 310 revs at 70mph. So, you'd get a good slice of the benefts of the longer 5th, but without an unusually large gap between 4th and 5th. You'd also get a longer 1st, 2nd and 3rd. I think this sounds promising. :)

Tom
 
Hooley said:
I'm liking the sound of the Bluemotion gearbox.....

Anyone else have thoughts on this?

J
Click to expand...

For info, the EXB is not a Bluemotion box as it has been used on TDi Polos since Sept 2000.

They use JDD boxes (among others) and these have even taller ratios but don't appear to be part of the 02J family. A lot more research would be needed to confirm compatibility with the AMF engine.

Cheers Spike
 
spike said:
For info, the EXB is not a Bluemotion box as it has been used on TDi Polos since Sept 2000.

They use JDD boxes (among others) and these have even taller ratios but don't appear to be part of the 02J family. A lot more research would be needed to confirm compatibility with the AMF engine.

Cheers Spike
Click to expand...

Spike,
Are you saying that the EXB needs more investigation or the JDD?
Thanks
J
 
The EXB and your existing EWQ box are both part of the '02J' gearbox family, have been in use since Sept 2000 and are likely to be interchangeable.

The JDD box is much newer, may not be an '02J' derivative, and is more likely to have major differences which would make installation more complex, or even impossible. The only way to check is to have the two boxes sitting side by side and go through every detail

Cheers Spike
 
Am I right in thinking that the TDI90's 'box (GRJ) cannot fit the AMF engine?
If so, why not? It's of the 02J family, but are there complications surrounding the TDI90's use of a DMF?

Cheers,

Tom
 
OK
So I've done a bit or research and have found out (through) Vince that both the JDD and the EXB gearboxes will fit as the have the same bellmouth

These are the two options:
EXB
EXBvsEWQ_zpsf29a5ad4.jpg


JDD:
BluemotionvsEWQ_zps83091ac0.jpg


As you can see there is quite a jump in the bluemotion (JDD) box, especially once you get in to 5th, but the ratios are spread so should work well

Vince also told me that there is a nice A2 currently in with him that is about to get a JDD box at some point in the next 3 weeks (he said it was owned by someone called Simon - anyone on here??

Anyway, what are the thoughts of those with the longer geared boxes? How do they relate to the bluemotion box?

Cheers
J
 
The more I drive my A2 the more I think it's undergeared throughout - especially with a remap. That bluemotion box looks to be a good step forward - cheaper than a 6 speed box mod?!
 
The interesting point is that the RPM drops at 70 from 2500 to 2100, right at the start of the 'meat' of the torque in the rev range.
Mine is mapped (by Stealth) and picks up nicely at 1800rpm and is fully on song at 2000rpm, so on an open motorway if i were to travel at 75 (to 80 sometimes) then i''l be at 2200 to 2300 rpm.

And on to a theoretical top speed of over 130mph

Interesting.....
 
Yep, puts you in the max-torque sweet spot. Should therefore also be running closer to the engine's most efficient power band for load and RPM then too.

The idea of an A2 topping 130MPH is amusing :)
 
Good detective work Dan.
One of my concerns was that in line with many later transmissions, the JDD box may not have the same speedo drive arrangement. If that's the case it could mean a change of clutch housing or splitting the box to add the speedo drive parts. I guess Vince has already checked this out.

Cheers Spike
 
Hooley said:
Vince also told me that there is a nice A2 currently in with him that is about to get a JDD box at some point in the next 3 weeks (he said it was owned by someone called Simon - anyone on here??
Click to expand...

That would be me :)

Saw Vince a few weeks back and we talked about a clutch change. Since the gearbox needed to be taken off anyway, I looked into the Bluemotion gearbox to replace mine.

Sourced a JDD gearbox from a BMS engine cost £250, Vince has it at his shop now. It will fit onto my AMF engine without having to swap the gearbox drive flanges as we first thought.....Result!

I have driven a friend's Bluemotion and it felt gutless compared to mine but still managed to pull the gears with only 75bhp, I don't think a remapped engine will have any problem with these ratios.

Having the work done in the next few weeks I so will update everyone.



You can also look for a JNC or HDS VW gearboxes which has 6 speeds, these cost about £500-600, still cheaper than the 6th gear mod. Although I do not know if they will fit the A2?


Hooley.... Thanks for the graphs, helps to see how the ratios will affect speeds. BTW, I will have an A2 gearbox for sale in a few weeks if you are interested? ;)
 
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Zoltar

Great minds think alike....

Thanks for the offer but I'm looking at the JDD or BXM myself as I can get one of either with less than 30k miles for similar money.

I am interested to know what problems you encounter though, especially the speedo drive.

Cheers
Jason
 
This has been an interesting thread! However, as is usual with me, I am feeling a bit confused? The 6th gear mod with "Stealth" comes out at ~£1425. Now you are saying that it may be possible to fit a different gearbox, (or one that already has 6 gears?), for far less than that? Well, if that is indeed the case, why has that not been the preferred route towards better economy? I would imagine that there is a higher labour cost with changing gearboxes, (the current 6th gear mod is done without gearbox removal), but you are talking of only ~ £650 for the replacement box in the first place? (but that is not for a 6-speed, "blue-motion" box, is it?) Please help me to understand what this is all about!

David
 
dan_b said:
The idea of an A2 topping 130MPH is amusing.
Click to expand...

Theoreticaly, my A2 would be doing 150.36mph at 4200rpm! However, the rest of the car's not made to do it, so I shan't be testing this theory. :)
For the 0.659 5th with standard tyres, that figure is 129.47mph.
 
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