Old Differential - Two Oddities

[DrJB]

I got a hold of 2 of the old differentials (prior to 8880) and have 2 main observations:

1. The differential cage is actually made up of 2 parts that are glued ... interesting

2. The cage can accommodate both the 12 and 14 bevel gears ...

First time I see #1, and it took me a while to 'wrap' my head around #2

Edited February 14, 2014 by DrJB

[unimog123]

That's a bit odd. I did not notice this, but I also don't have 14 tooth gears.

[weavil]

A picture would be nice. Because I'm lost or tired, but I'm having trouble picturing it in my head.

[DrJB]

Here ya go 73071

[Technyk32231]

I've noticed this too. I actually got this differential from my dad's old Lego collection. He had it in the dragster set, which only had a two cylinder engine.

[allanp]

It makes sense that both gears work as they will both work in the same situations. To create a limited slip diff (using an illegal technique) you can mix both old and new to make the diff action very stiff.

[SNIPE]

all lego differentials can have 12 or 14 tooth gears but mixing them doesn't really work.

Edited February 14, 2014 by SNIPE

[Junpei]

The reason they can both fit is because while the 14 tooth gears are larger in diameter, they are also 2 LDU thinner.

Also, another peculiar thing- both it and the new-style bevel diff have 28 teeth.

TLH

[SNIPE]

If the old diff have the spacers sticking out of the two holes it would be perfect 3L, and the 48 tooth gear can be used as a bevel or a spur

The mini turntable is also 48 tooth bevel or spur

Edited February 15, 2014 by SNIPE

[Junpei]

I had already modified one prior to this topic, and you reminded me that I should post it. It works amazing; it can handle super-high torque, fit 4 bevel gears in it (as opposed to 3 in the new-style diff), fit in a 5x7 frame, and is driven by a 12 tooth double bevel gear!

Oh, and it's 28 teeth, not 48.

TLH

Edited February 15, 2014 by TwentyLeggedHen