Series 3 speedo drive

rob corner

Member

Posts

11

Location

Nottingham

• May 9, 2021

• #1

After a little advice please; I have my transfer box apart currently, before I put it back together could someone just confirm that the speedo drive just runs freely on the shaft and isn’t actually pegged or anything? This is how it seems on mine but that seems a bit strange as it seems free to slip?

 

jamesmartin

Well-Known Member

Posts

91,879

Location

louth lincs

• May 9, 2021

• #2

rob corner said:

After a little advice please; I have my transfer box apart currently, before I put it back together could someone just confirm that the speedo drive just runs freely on the shaft and isn’t actually pegged or anything? This is how it seems on mine but that seems a bit strange as it seems free to slip?

View attachment 237904

Click to expand...

yes output flange clamps it tight

 

Last edited: May 9, 2021

R

rob1miles

Well-Known Member

Posts

3,565

Location

Slough and Bath

• May 9, 2021

• #3

Take your time doing the preload, its makes a big difference to how the output shaft runs. If there's not enough the pre-load disappears when the box gets hot and expands and this lets the shaft wobble which causes the oil seal to pass oil into eh transmission brake.

 

rob corner

Member

Posts

11

Location

Nottingham

• May 9, 2021

• #4

Thanks guys, I’ve renewed all the seals so will make sure I get the preload right when it goes back together.