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excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5843

1999 Defender 110 Td5 SW Caledonian Blue

Replacement gearbox

As my gearbox will be heading to gearbox heaven, I have been looking around and I think I have settled on a box from Ashcrofts, has anyone gone for the upgraded bearing mod that is offered?

" Heavy Duty Rear Support Bearings

One of the common failure modes of the R380 is premature wear of one or both of the rear support bearings in the rear 5th speed aluminium housing, this starts as a whirring in all gears but not so bad in 4th, then as the bearings wear it allows the 5th gear on the layshaft and 5th gear on the mainshaft to come a little out of mesh, then 5th also gets noisy and often results in the teeth coming of one or both of the 5th gears, after much design work we are now able to offer to upgrade these two bearings.

The Layshaft rear support bearing is FTC2385, this is made by RHP and has a dynamic load rating of 27Kn, we replace this with a larger bearing of equivalent quality which has a dynamic load rating of 35.5Kn, this is a 31% increase. See below a comparison photo of stock vs our HD one." 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

13th Nov 2014 7:03pm

NickH

Member Since: 01 Nov 2014
Location: Halifax
Posts: 204

Hi

I have no personal experience of this mod but I have rebuilt lots of R380 boxes. It makes sense about increasing the size of the bearing but IMHO you are talking about a lot of miles before the standard bearings give up. If you are keeping your LR a long time and arent bothered about the extra cost then go for it. If your vehicle is standard power output I would leave it and spend the money on something cool like cocaine and prostitutes,....only joking, I meant something shiny for your LR.

2003 Td5 90
2013 sport hse
2012 700 raptor quad
2012 siromer 4x4 tractor

13th Nov 2014 11:42pm

I.AM_a driver

Member Since: 11 Jun 2009
Location: Edinburgh, Scotland
Posts: 404

I'm getting a fair bit more noise in fifth than I used to, I guess that means I'll need to bite the bullet soon & go for a recon box too! Mark S
CONVOY for HEROES
www.facebook.com/convoy4heroes
www.lothian4x4response.org
------
Td5 90
Thread in 'My Defender' Forum

14th Nov 2014 2:44am

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5843

@NickH - The car does have a mild stage 1 remap but I think for the extra I think it might be worth doing.

@I.AM_a driver = I was getting like a rough bearing noise in fifth and the noise increased under load and then finally went with a clang. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

14th Nov 2014 9:29am

I.AM_a driver

Member Since: 11 Jun 2009
Location: Edinburgh, Scotland
Posts: 404

It's more like a louder whine in 5th at the moment, which I'll be keeping a close ear on in the coming weeks. Mark S
CONVOY for HEROES
www.facebook.com/convoy4heroes
www.lothian4x4response.org
------
Td5 90
Thread in 'My Defender' Forum

14th Nov 2014 9:36pm

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