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Braydog

Member Since: 11 Apr 2012
Location: Melbourne
Posts: 27

2008 Defender 110 Puma 2.4 SW Alpine White

series 3 gearbox issue

Hi folks,
I'm slowly restoring my 88in series 3. Runs well but has an issue with both 1st and 2nd gears jumping out of gear on overrun. Pulls fine under load but instantly jumps out when coasting back down my hill to home. I am wondering whether it is the gear selectors or more likely a worn bearing or something. Before I drop the gearbox and send it off for reconditioning, I would appreciate any feedback or suggestions.
Cheers,
Mick Sometimes It is better to ask for forgiveness, than to ask for permission.

16th Jan 2017 7:31am

xtr2turbo

Member Since: 30 Apr 2016
Location: Hertfordshire
Posts: 71

2016 Defender 110 Puma 2.2 USW Corris Grey

could be the detent springs

16th Jan 2017 12:35pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

It's a long time since I played with a Series box but I, too, remember something about detent springs. If I recall correctly, they can be accessed by removing a small plate on top of the 'box, underneath the middle of the seat box. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

16th Jan 2017 1:31pm

Braydog

Member Since: 11 Apr 2012
Location: Melbourne
Posts: 27

Thanks for the replies. I will look at those first.
Cheers Sometimes It is better to ask for forgiveness, than to ask for permission.

17th Jan 2017 1:56am

Gareth

Member Since: 12 Dec 2011
Location: Woodford
Posts: 1107

Yes the detent springs are a strong possibility. Remove the floors, centre tunnel, and bell housing cover. The 1st/2nd selector shaft is the middle shaft, and it's detent spring is under the brass plug. It's dead easy to change the spring.

It is possible to undo the selector cover and inspect the condition of the selector shafts, you may find that the notches in the shafts have wear in them where the detent balls have been locating. If so, you can renew them without removing the box.

However, you have to judge the chance of success against the overall condition of the rest of the box. If the synchro hubs are also worn, it could still jump out of gear.

Worth a look though. 2021 Defender 110 X-Dynamic HSE D300 MHEV
1966 S2a 109 aka Betsy

17th Jan 2017 6:39pm

v8steve

Member Since: 18 Apr 2011
Location: dumfries scotland
Posts: 195

2007 Defender 110 Puma 2.4 XS CSW Rimini Red

if not the indents i think it may be the syncro rings on these gears. if this is the case it's a complete strip job. fingers crossed it'snot. 110 xs s/wagon
s3 swb soft top

17th Jan 2017 7:43pm

Braydog

Member Since: 11 Apr 2012
Location: Melbourne
Posts: 27

Thanks for all your replies. Much appreciated. I hope to work on the old girl this weekend and will investigate all your suggestions.

Cheers Sometimes It is better to ask for forgiveness, than to ask for permission.

18th Jan 2017 9:24am

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