gti/tdi gearbox?

mikeystill87 · Post by **mikeystill87** » Wed Oct 15, 2008 6:40 pm

Ive had a look through past topics, and i cant see this covered.
My gti box has gone, along with other things! So i was looking at getting a new box but have thought about putting a tdi box in if it fits.
My friend has a 106 gti and put a diesel gearbox in,which works great.Ratios are different, but for cruising along the motorway its brilliant. Im taking it that because noone has spoke about it before they dont fit?

anyhelp appreciated. thanks

tomo87 · Post by **tomo87** » Wed Oct 15, 2008 6:45 pm

most things can be made to fit....its just you have to weigh up if the costs are worth it?

mikeystill87 · Post by **mikeystill87** » Wed Oct 15, 2008 6:49 pm

Ah you see his box jus bolted right on, thats really what im looking for. Am I right in saying diesel boxes are a bit stronger?
Really fed up of this machine sitting out the front!!

tomo87 · Post by **tomo87** » Wed Oct 15, 2008 6:53 pm

mikeystill87 wrote:Ah you see his box jus bolted right on, thats really what im looking for. Am I right in saying diesel boxes are a bit stronger?
Really fed up of this machine sitting out the front!!

yes diesel boxes are generaly stronger i think, sometimes people use them on 20v conversions.

i dont think there is a diesel box that would bolt straigt on, im sure it would have already been done!

mikeystill87 · Post by **mikeystill87** » Wed Oct 15, 2008 6:58 pm

yeh I thought if it was possible quite a few people would have done it.
thanks very much for your help.

Tim_GTi · Post by **Tim_GTi** » Thu Oct 16, 2008 12:56 am

May help you..

Gear ratios:

GTi 'Box:

1st - 3.46
2nd - 2.12
3rd - 1.44
4th - 1.09
5th - 0.89
Final Drive - 3.60

1.9 SDi 'Box:

1st - 3.46
2nd - 1.96
3rd - 1.18
4th - 0.85
5th - 0.71
Final Drive - 3.30

1.4 TDi 'Box:

1st - 3.30
2nd - 1.94
3rd - 1.31
4th - 0.97
5th - 0.76
Final Drive - 3.16

1der · Post by **1der** » Thu Oct 16, 2008 9:46 am

what does all that mean in terms of differwence?
I dont understand how the ratios work

Mouse_GTI · Post by **Mouse_GTI** » Thu Oct 16, 2008 11:49 am

I did them at Uni in first year and have totally forgotten lol

bbspolo · Post by **bbspolo** » Thu Oct 16, 2008 11:52 am

It sounds like a good idear but trust me its not

Been there tried that!

deisel polo boxes are no stronger infact there excatly the same as petrol boxes just different gear ratios and a different final drive!
the one i had lasted 15k (same as the petrol boxes ive used!) But had a horrible gear spread! 5th on the red line would do 100mph and 1st was far 2 short 2 use!!
Dont ask me which one i had i can only rember it was for a diesel, i only used it as it was orderd by mistake by my garage and i managed 2 get it by paying my parts department the surcharge that was on it! (Â£250 i think)