Thread: MXA 5R

Originally Posted by Ancient Mariner

The shafts are 4340 and the flange 4140.The internal spline was cut with a slotting head
and rotary table on Bridgeport mill .Matt sugest little to be gained by heat treating unless
they were annealed prior to machining IMHO

Thanks AM

Without hardening heat-treatment you aren't getting much strength/hardness benefit over lower grade steels.
The whole point of 0.4% carbon content is to allow hardening.

I was comenting on matts x salisbury axles mine will be heatreated

Very nice work...any pics of your Bridgeport and slotting head ?

Originally Posted by Ancient Mariner

I also Emailed Grubb about a shaft but received no reply so did my own thing
Fully floating is my preferred method anyway Some bits ready for heat treatment

My bad They look good. Maybe I should be ordering shafts of your

Originally Posted by Bush65

Unless it is a late suffix R380, I wouldn't even bother thinking about it.

FWIW My 4BD1T Defender conversion has now covered nearly 220000kms with a late suffix R380 behind it. 5 crossings of the Simpson in three years (the last August last year), and much other hard work. The gearbox continues to perform very well. The vehicle is almost always up on GVM limit.

To those who question the durability of the combination I think my vehicle speaks for itself

C H T

Originally Posted by Ancient Mariner

I also Emailed Grubb about a shaft but received no reply so did my own thing
Fully floating is my preferred method anyway Some bits ready for heat treatment

Are you able to produce more of these flanged, splined sockets? The shaft I can get made in future when I know the length. But no point re-inventing such a nicely made wheel.

What shift pattern do you end up with Ancient Mariner?

Is it:
1 3 5
R 2 4

Steve

Originally Posted by steveG

What shift pattern do you end up with Ancient Mariner?

Is it:
1 3 5
R 2 4

Steve

That's what it looks like from what I see of how the shifter was made.

This is the AM's pic showing the shift rails and shift blocks, note it is rotated so front is at bottom of pic and left side is at right of pic


In a MXA5 or 6:
the rail for 1 & R is leftmost and moved to rear for R, forward for 1st
the next rail to right is 2 (rearward) & 3 (forward)
the next rail to right is 4 (rearward) & 5 (forward)
the next rail to right is 6 (rearward) (MXA6 only)

You have to look carefully at the pics to see how moving the top of the gear shift to left, rotates the long shaft clockwise and will move the selector onto the shift block on the left side.