5 replies to this topic

[timbo]

I have had a question bugging me for a while now.

I've got all the engine bits of a 1071 for my project mini but I haven't got a gearbox.

Now I know the 1071 block is effectivley a 1275 block so my question is, Do I use a 1275 gearbox for the engine. I'm unsure what's the difference between a 998 and a 1275 gearbox apart from the drop gears. So also what drop gears do I use.

cheers,

timbo

[dklawson]

If you're going for "correctness", I believe you're looking for a close-ratio, 3-synchro, remote shift gearbox. However, parts for 3-sych boxes are becoming harder to locate. A later 4-synchro remote would also work and look correct. However, if this engine/gearbox is going into a later bodied car you'll probably find that fitting a rod-shift gearbox is easiest. It is my understanding that by the time the rod-shift arrived on the scene you could use it under any transverse A-series. As others read this I'm sure they'll correct me if I'm wrong.

[Guess-Works.com]

DK's pretty much spot on...

For the traditionalist, you would be looking for a 22G190 ( the 22G333 was used on the 1275 ) cased 3 sync remote gearbox.... and you thought finding a 1071 was difficult !!!

I've seen the cases fetch over £400, and that's without the internals.

You gearbox choice should be based on the vehicle it's going in and the shape of the tunnel, if it takes a rod change, use a rod change box, and I would recommend and A+ over an A series, as they are stronger..

Edited by GuessWorks.co.uk, 26 March 2009 - 06:59 AM.

[timbo]

Right I think I understand that.

So what drop geras do i use 1275 or 998?

timbo

[Guess-Works.com]

If you're using a 1071 crank then it'll be 1275 drops ( the type of drop is determined by the diameter of the inner bush of the primary gear required to run on the crank )

[scott brady]

DK's pretty much spot on...

For the traditionalist, you would be looking for a 22G190 ( the 22G333 was used on the 1275 ) cased 3 sync remote gearbox.... and you thought finding a 1071 was difficult !!!

I've seen the cases fetch over £400, and that's without the internals.

You gearbox choice should be based on the vehicle it's going in and the shape of the tunnel, if it takes a rod change, use a rod change box, and I would recommend and A+ over an A series, as they are stronger..

I paid over 1k for my 190 box with s/c gears.

http://minimorriscoopers.blogspot.com/

A rare box but it is in excellent condition.

Attached Files

•  DSCN0045.JPG   708.1K   11 downloads