3.9 Diff

[lee_rob]

I have a 3.9 diff that is noisy to the point of unbearable. Can anyone recommend where I can get it rebuilt?

[bmcecosse]

Just DIY it using the Manual as your guide...... If it has been running 'noisy' for some time - it may not be possible to eliminate the noise now since the gears will have worn into a pattern..... But it costs nothing to try!!

[Declan_Burns]

We will be rebuilding one on Saturday and I will document the re-assembly. I already have the photos on how we took it apart.
Regards
Declan

[rotgnom]

Hello Declan,
I'm looking forward to seeing that pics.
Achim

[lee_rob]

I have had it apart once and the bearings seem fine no play and feel smooth. It's just been getting progressively noisier. Hope it doesn't need a new CW&P as that could be pricey

[Declan_Burns]

Lee,
If you do want to buy a CWP, ESM charge £197.50 but without VAT. Bastuck here in Germany Charge 246.96€ incl VAT which is cheaper considering the exchange rate and our postage is a lot cheaper than UK postage.
http://www.bastuck.de/shop/index.php?ca ... 0&ug=71009
In fact it is Bastuck who is distributing CWP's throughout the world-they are having them made (China???)-and not just for Moggies!
Regards
Declan

[bmcecosse]

If you do have to buy a CWP - may as well get 3.7, which will be much more valuable in the long run. But - let's see pictures of your CWP meantime !

[Declan_Burns]

The 3.7 is the same price and so is a 3.55, although I've never heard of anybody using a 3.55.
Regards
Declan

[lee_rob]

3.7 would be too tall a ratio for a standard 1098. I want to be able to get up the hills without bring stuck in 3rd. I like the 3.9 ratio it just takes the revs down enough. Mine cruises quite happily at 65 on the motorway.

[don58van]

Hello Declan

Will you be posting your 'How to' here, or do we need to message you with our email addresses?

Thanks for sharing.

Cheers
Don

[Declan_Burns]

Don,
I'll post the photos here. No guarantees as I've never done a diff before-that's the challenge. There is gearbox expert locally who will guide us if we run into any problems.
Regards
Declan

[Declan_Burns]

Hans Dieter and I put the diff back together on Saturday as mentioned above.This is not a how to but we just wanted to demonstrate the assembly sequence.
1_0_Initial_layout_overview_1[frame][/frame]
1_1_Differential_pinion_and_gear thrust_washers[frame][/frame]
1_2_Installed_differential_gear[frame][/frame]
1_3_View_of_shaft[frame][/frame]
1_4_Installing_pinion_gear[frame][/frame]
1_5_Differential_gears_and_pinion_installed[frame][/frame]
1_6_Shims_installed[frame][/frame]
1_7_Bearing_prepared[frame][/frame]
1_8_Pressing_on_bearing[frame][/frame]
1_9_Crown wheel_bearing[frame][/frame]
2_0_Carrier_ready[frame][/frame]
2_1_Preparing_the_pin[frame][/frame]
2_2_Installing the pin[frame][/frame]
2_3_Installing_crown_wheel[frame][/frame]
2_4_Torquing_crown_wheel[frame][/frame]
2_5_Lock_tabs[frame][/frame]
3_1_Housing_prepared[frame][/frame]
3_2_Pinion_installed[frame][/frame]
3_3_Torquing_pinion_nut[frame][/frame]
4_0_Bearing_caps[frame][/frame]
4_1_Engineers_blue_tooth_pattern 1[frame][/frame]
4_2_Engineers_blue_tooth_pattern 2[frame][/frame]
4_3_Engineers_blue_tooth_pattern 3[frame][/frame]
Regards
Declan

[taupe]

Declan

Most interesting, thanks for sharing

Taupe