A definitive answer on longer ratio gears - not just 5th?

[Swalsey]

Hi all,

After searching the forum I can't find the answers I'm looking for - I wish I could read german!

I wonder whether anybody has fitted a 1.2TDI gearbox to a 1.4TDI, or that from a Polo Bluemotion / Seat equivalent? I'm looking for longer legs without compromising back country roads where the 0.75 ratio is ideal, so 4th is too high. Longer 3rd, 4th and 5th, or 6 speed seems better then just longer 5th for my driving.

Another though - has anybody found a way of increasing the final drive, or a viable 6 speed box? Talk seem to have dried up since the 5th gear thread!

Hopefully I can plan a summer project

Thanks in advance,

 

[the grim reeper]

For your German reading problem have you tried using Yahoo's babel fish to translate pages or similar????


Cheers Phil

http://uk.babelfish.yahoo.com/

 

[spike]

There is a thread on 6 speed gearboxes - http://www.a2oc.net/forum/showthread.php?t=4241&highlight=speed+gearbox

Cheers Spike

 

[Swalsey]

Thanks GrimReaper - I'll have a go with that.

Thank Spike, I read that before posting but it didn't seem to amount to any (relatively) easy solution, no answers as to what and how...

 

[spike]

Hi Antony
There was just enough detail in the 6 speed box threads - here's another one - http://www.a2oc.net/forum/showthread.php?t=5865&highlight=gearbox+mount
to indicate the conversion is rather complex. Seems to need custom gearbox mounts, shortened driveshafts and special adaption to make the speedo work.

Cheers Spike

 

[Swalsey]

Thats more what I wanted, thanks Graham! I think I'll focus my enquiries on a Blue-motion 5 speed or similar...

 

[Adrian888]

i am sure what you are looking for can be achieved, money no object.... Skipton enquired aboiut changing the final drive some time ago and was quoted over £800...... The 5th gear only upgrade is in my opinion the only cost effective solution for adressing teh relatively low gearing.

 

[fbi]

Taller tyres (within limits to avoid rubbing) is the cheaper and easier solution to raise the final ratio. If the tyres are due for replacing, I'd even say that it's a free solution.

 

[Swalsey]

Hi

I'm planning to go to 205/45 when mine are due for replacement; aparrently that'll give an extra 3mph (ish)

Thanks,

 

[dan_b]

Are you on 17s? I run 215/40 which is larger diameter so slightly longer overall final drive I guess - the speedo is now completely bang on accurate too. Getting 53mpg at the moment so still plan to do the 5th gear mod

 

[Swalsey]

Hi

Yeah, I'm on 205/40/17 at the moment. I used a tyre size calculator, the diameter is about another cm IIRC from 215/40 to 205/45. I'm driving like a saint to be getting high 60s at the moment, but I'm yet to do a whole tank as carefully as possible... it's hard work!