↓ Advertise on Defender2 ↓

Home > Technical > Transfer Box etc
Post Reply  Down to end
Page 1 of 1
Print this entire topic · 
driesdej



Member Since: 02 Oct 2017
Location: Nosy Be, Madagascar
Posts: 7
Transfer Box etc
At long last, after many months i have finally put my "new"second-hand front diff center portion in. That is after i had to re-order new 24/32 spline side-shafts from the UK. I know the 24/32 side shafts are the weaker ones, but that's what i got.
two questions concerning diff and transfer box

Question 1- the forward/backward motion is gone completely even though i have a hum on the front diff. When i bought the center portion ( a re-built one, i think) it had very little play on the crown wheel and pinion. Obviously the cause of the hum even though it is not irritating at all.
Would the hum be because of too little play or too much play between the crown wheel and pinion ???

Question 2 - I have found some other play on/inside the transfer box. Would the most likely cause be worn gear train or more specifically the diff unit inside the transfer box ???

Thanks for a great site, all help is much appreciated
Dries - Nosy Be, Madagascar
Post #654385 2nd Oct 2017 4:50pm
View user's profile Send private message View poster's gallery Reply with quote
jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8145
 2011 Defender 110 Puma 2.4 USW Stornoway Grey
1. diff centre ok? 4 pins or 2 pin?
2. How much play on t box, 1/8turn can be expected on flanges! Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #654445 2nd Oct 2017 8:37pm
View user's profile Send private message View poster's gallery Reply with quote
driesdej



Member Since: 02 Oct 2017
Location: Nosy Be, Madagascar
Posts: 7
Diff Center portion ok.
Maybe more towards quarter turn on T-box
Backlash has increased over the last two years
Post #654475 3rd Oct 2017 3:05am
View user's profile Send private message View poster's gallery Reply with quote
driesdej



Member Since: 02 Oct 2017
Location: Nosy Be, Madagascar
Posts: 7
Diff is 2 pin arrangement
Post #654476 3rd Oct 2017 3:06am
View user's profile Send private message View poster's gallery Reply with quote
jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8145
 2011 Defender 110 Puma 2.4 USW Stornoway Grey
does seem alot of play in T box, i would be looking to investigate further on 1/4 turn

diff - preload on it is wrong, set up wrong hence the noise. it will go pop at some point although may not be for a long time, depends how bad it is. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #654803 4th Oct 2017 10:19am
View user's profile Send private message View poster's gallery Reply with quote
driesdej



Member Since: 02 Oct 2017
Location: Nosy Be, Madagascar
Posts: 7
Could you explain the "pre-load"bit you are referring to?
Thanks for the info
Dries
Post #655137 5th Oct 2017 3:35pm
View user's profile Send private message View poster's gallery Reply with quote
dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554



Post #655138 5th Oct 2017 3:49pm
View user's profile Send private message View poster's gallery Reply with quote
jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8145
 2011 Defender 110 Puma 2.4 USW Stornoway Grey
^^^ its been set up wrong would be my guess from your description Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #655172 5th Oct 2017 6:37pm
View user's profile Send private message View poster's gallery Reply with quote
driesdej



Member Since: 02 Oct 2017
Location: Nosy Be, Madagascar
Posts: 7
Hi James thanks i understand pre-load has got to do with shimming.
The humm i spoke of earlier is from the new "secondhand" front center portion i replaced.
I presume the shimming on the pre-load between crown wheel and pinion is not right which causes the humm ??
How can i "fix" that bearing in mind i am 800 km from nearest LR spares agent. (the backlash was very little on replacement)
Dries
Post #655267 6th Oct 2017 7:55am
View user's profile Send private message View poster's gallery Reply with quote
blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17527
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
A hum from the front diff could be caused by incorrect backlash between crownwheel and pinion, incorrect pinion height, incorrect pinion bearing preload, incorrect differenctial bearing preload, failing bearings, or any combination of the above. It is hard to say that any single adjustment will be the right one without stripping the diff and rebuilding it accurately.

It is also possible for a new diff to hum or whine before it is run in, in which case the noise may simply decrease and become unnoticeable abfter a while.
Post #655298 6th Oct 2017 9:53am
View user's profile Send private message View poster's gallery Reply with quote
driesdej



Member Since: 02 Oct 2017
Location: Nosy Be, Madagascar
Posts: 7
James thanks a million for your help
Much appreciated
I will just drive for some time and see if it goes away.
Dries
Post #655544 7th Oct 2017 4:29am
View user's profile Send private message View poster's gallery Reply with quote
driesdej



Member Since: 02 Oct 2017
Location: Nosy Be, Madagascar
Posts: 7
ooops sorry!
Thank you Blackwolf
Dries
Post #655766 8th Oct 2017 4:25am
View user's profile Send private message View poster's gallery Post Reply
Post Reply  Back to top
Page 1 of 1
All times are GMT

Jump to  
<  Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2025 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums