Kombi Vs beetle tranny in buggy

Bought a buggy and am in the process of rebuilding. I'll be driving mainly in the city, but will go off road a little. It currently has a Kombi tranny (with spider gear) which is supposedly fine. Should I keep it or put in a beetle tranny in. If so what should I pay? Will the tranny gear let drive at a decent speed on roads. Any info would be great as I'm still learning

Thanks

What speed can I comfortably drive in kmh with a kombi box

You need to tell us which kombi transmission ? Are we talking IRS or swing axle ?

Swing axle from the 60's

we are talking reduction hubs ? are the big or small nut boxes ?

I've been told that it is a 60 - 63 box.

dbmanx, I think what you meant to say at the start was it is a reduction gear box, not a spider gear. A spider gear is the two gears in your diff, all gearboxes (non lsd) have them.

The reduction hub gearbox you have is no stronger than a beetle one, as it is basically a beetle gearbox with the diff flipped and different axles.

If you go to a beetle gearbox you will lose a lot of the ground clearance you must have at the rear at the moment.

Early (60-63) reduction hubs varied between 1.68:1, 1.40:1, 1.38:1, 1.26:1. The later ones (63.5-67) were all 1.26:1. The safe speed you can do on the highway will depend on what tyre size and reduction ratio you have.

I have a type one box in my manx at the moment which is geared a little tall for my likings- but great high way speeds are not recomended as buggy's are too light and not very aero dynamic- I wont take mine over 80mph as the front end starts to lift and skip a bit ( rather frightening at that speed).