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Discussion Starter #1
I have got a vento g/box with the code asd, which I think is 0.717.

The code in my van which is a 1.9tdi conversion is DQL 0.756.

Now these numbers don't mean anything to me, so what I want to know is how much difference is it goin to make at cruising speed if I change the fifth gear over? Would it be worth the effort?
 

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Discussion Starter #3
not 100% sure but think its more than that. Ill do a run in it and find out, but thanks that gives me a bench mark figure to work with.T:
 

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Andy,

More questions about the TDI conversion i'm afraid....... (got a 2.5TDI airbox) so the convsion is well on its way and I will post a tread on here shortly, anyway I'm changing my 5th gear too and have the same set up as you!! Question: what size wheel / alloys are you running?? because this will effect the overall RPM T:
 

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Gasman, I presume your conversion started off as a 1.9TD Caravelle, which have the .756 as standard. I've been wondering the same thing as you - so far I reckon it will take me too long to re-coup the fuel saving, but it might be worth it fro a more relaxed cruising.
 

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Hey Guys!! Have a look at the technical articals & in particular aggie's conversion there is a link on the end that will give you loads of info regarding ratios ect(well worth a look). Is it worth the change? My van is currently being converted to Tdi & has the same box as yours & yes the gearbox/5th is being upgraded. In short with the price of fuel going up on a daily basis :eek: Its worth every penny!! Even more so if you do a lot of motorway driving. T: Good luck
 

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Discussion Starter #9
Been out for a run and its doing 3500rpm at 70mph and im running 225/40/18 tyres so I am defo gonna do this conversion. Got the end cap off the vento box tonight, just need to get a puller to get the gear off the shaft then transfer it over. It does seem like a fairly easy job to do and as ive got the box sat there it seems a no brainer if it drops the revs down to somewhere close to andyd's 2500rpm at 70mph!

I will hopefully have the job done in a few days if I can get hold of a puller so I will report back with the results:ILU:
 

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What sorta price are we looking to get the job done?
By yourself or garage?

Can the job be done by anyone that can handle an egr blank and de-cat exhaust? or is a bit more complex?
 

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ive done this conversion myself using the 5th gear from the donor car i cant honestly remember what the ratios were or are now, but theres a definate notice in lower rpm not loads but definatly better and i can cruise all day with a full ikea conversion at 70 mph with ease T:
i wouldnt hesitate to do it again and its realy easy if you got the right pullers :ILU:
 
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