Chit ya normally don't see, Diff disected.

[warp9.9]

I have a 20" bit of clear tubing which I use to suck the bottom oil out big point here is do not swallow

I got to ask. Do you have the skirt on when your sucking that tubing

 

[Paul Bryant]

I got to ask. Do you have the skirt on when your sucking that tubing

ooooooohhhhh no Warp, just NO. That just doesn't bare thinking about

 

[Paul Bryant]

O.K today's play time.
I made up simple tooling to press the Female spline adapter thingy off, it took a bit to budge, but once moving went easy enough. 20 ton press there.

Beside the circlip is what's left of a seal.

I didn't even try to undo the lock ring that locates the bearing.

So once again I say, we won't be duplicating this assembly.
The cost of machining this shaft with a pinion, two precision ground bearing positions and a spline, just ain't gunna happen.
As Warp has said an improved ratio 5th gear set is not an option, so it's down to an improved ratio output gear set.

When I get that far into "Lazereth" I'll look at what it takes to modify these.

 

[idk]

If you are changing a 13 tooth for a 14 tooth then the new revs would be 13/14 of the original. Therefore, 2800 rpm would drop to 2600 rpm. This, IMHO, would not be enough to make it worthwhile.

Another thing to note is that due to both 13 and 37 being prime numbers, there is a minimal number of times when a particular part of each unit matches up. In this case, once in every 481 revolutions. With a 14 tooth gear it would be every 74 revolutions. This reduces wear if there is a small tolerance creep in one part of the system and is old school British engineering practice.

 

[Paul Bryant]

If you are changing a 13 tooth for a 14 tooth then the new revs would be 13/14 of the original. Therefore, 2800 rpm would drop to 2600 rpm. This, IMHO, would not be enough to make it worthwhile.

Another thing to note is that due to both 13 and 37 being prime numbers, there is a minimal number of times when a particular part of each unit matches up. In this case, once in every 481 revolutions. With a 14 tooth gear it would be every 74 revolutions. This reduces wear if there is a small tolerance creep in one part of the system and is old school British engineering practice.

Thanks IDK, that's the sort of thing I like to read.
There's always more to the way something is done a certain than meets the eye.

 

[R-III-R Turbo]

I'm lazy but found a way to check some of your maths.

they give 792.5 rear wheel revs per mile, id calculated 792.78. dammit im gonna give up this engine-eering malarky :-/

If you are changing a 13 tooth for a 14 tooth then the new revs would be 13/14 of the original. Therefore, 2800 rpm would drop to 2600 rpm. This, IMHO, would not be enough to make it worthwhile.

correct Ian that's why we need the big gear decreased a couple tooth too, revs would then be down a bit more to ~2456 from 2800. a similar drop that a 6th gear would give. pity it's not feasible to re-gear like that :-(

 

[Paul Bryant]

dammit im gonna give up this engine-eering malarky :-/

HA !

 

[Rick McC.]

Excellent endeavor Sir; thanks for your good work!

 

[Claviger]

Nice tear down and pics, thanks for doing this! Always good to have an illustration with cross sections as you've done!

 

[Idaho Red Rocket 3]

What about this idea ... would it work ? On 18 wheeler 10 speed transmissions the top gear is turned around on the shafts to obtain an overdrive of about 25%. They just switch the gears from one shaft to another. Could we do something like that with our 5th gear ?