are all the T3 5 speed boxes interchangeable?

[T25DREAMER]

Hi all
wondering about the T25 T3 Diesel Gearbox 5 Speed
are all the T3 5 speed boxes interchangeable
diesel /petrol?
mines 84 year

cheers

[Ian Hulley]

Await Aidan's expert advice but I believe the bellhousings and the ratios are different.

[T25DREAMER]

mine has a 1Y in it but it was originally as far as i know 1.6 D
the one im looking at also is from a 1.6 D

[Aidan]

your 1.6 n/a diesel box will be fine in a 1.6 n/a but if you've upped the engine to say a 1Y you'd be better off with one from a 1.9 petrol

[T25DREAMER]

ok the number underneath looks like
3H0201 6

Know what box thats off?

[Aidan]

1.6 TD, that will do nicely

[T25DREAMER]

you'd be better off with one from a 1.9 petrol..?
hmm dont know what this is off...but the number?
are the ratios different?
crossed post here!...

[T25DREAMER]

So they origonaly did a 1.6TD and also a 1.6non turbo T3 types?
and the TD box is stronger?

[Aidan]

yes they did about 100 different gearboxes over the course of the T3 to suit all the various engines and uses
no stronger but appropriately geared
the 3H is the same as a 1.9 petrol ABN box but with a diesel bellhousing and input shaft

[T25DREAMER]

100 different boxes!
you certanly know your stuff!
out of interest do you know what this code is

gearbox code ABR

1.6 non turbo?

[Dippy]

Hi,
I have recently acquired a camper converted 1979 Microbus, originally 1.6 petrol Aircooled but now with 1.9 VW Vento diesel engine fitted. The new engine is fine, but it still has the original 4 speed gearbox, giving me a very low cruising speed..
Any recommendations as to where I could lay hands on a reconditioned (or otherwise) 5 speed? If I am buying from a private seller, what do I need to look out for, compatability wise? (code numbers etc) The idea that VW made 100 different gearboxes for the T25 is daunting news..!
Cheers.