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NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 95

1989 Defender 90 300 Tdi HT Chawton White

Gear box question

Another question/query for you guys. Have my 90 now for 2 months and slowly but surely getting getting up to speed. One of the issues I have but never really investigated is my 90 appears to a fairly close ratio box. So close that 9 times outta 10 I always select reverse rather than first gear. There is no push down or button to select reverse therefore so simple just to it into reverse. At traffic lights etc when u stop, I literally have to double check each time before I set off. Any ideas??? Also sometimes it’s difficult to get 2 and 4th gear, only going down the gears. No issues with going up through them.

17th Apr 2022 6:18pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3214

2012 Defender 90 Puma 2.2 CSW Santorini Black

I guess you are talking about the LT77, being a 1989 90.
You should feel more resistance as you push the stick to the left to get it aligned with reverse. To my knowledge there is a spring loaded plunger to give that extra resistance.

LT77 should be filled with ATF. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

17th Apr 2022 7:22pm

NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 95

Yeah LT77, just changed oil last week with ATF. Can you install new spring loaded plunger? Thanks

17th Apr 2022 8:05pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3214

I do not know if it comes as a complete assembly, but you can check on LR Workshop:
https://www.lrworkshop.com/diagrams/land-r...r_53520#13

I would check the parts, It could be just a broken spring, or stuck plunger. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

18th Apr 2022 5:54am

NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 95

Thanks for link. Is the reverse plunger/sprig difficult to access? I have googled/YouTube and can’t find any info….

Thanks again for your help

18th Apr 2022 8:43am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 16927

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Re: Gear box question

NFIN02 wrote:
... a fairly close ratio box. ...

Just out of interest, what do you understand the term "close ratio box" to mean?

18th Apr 2022 9:23am

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3214

As my gear-change assembly is still off the 90, I snapped a few pictures for you. I think you can access it from above without removing the gearbox tunnel. Mind there is a shim.
The plunger is very difficult to press by hand.

Click image to enlarge

Click image to enlarge 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

20th Apr 2022 6:13pm

NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 95

Many thanks for the photos

20th Apr 2022 10:03pm

ashtrans
Site Sponsor

Member Since: 08 Nov 2008
Location: Harpenden
Posts: 255

it sounds like the plunger on yours has jammed in,

strip, clean, oil and reassemble and pinch in and out in a vice a few times to test, Dave

21st Apr 2022 8:30am

NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 95

Hey all, still never got round to getting this fixed. To be honest just recently realized my 300tdi has a td5 gear box. Any ideas about plunger location etc

19th Jun 2022 8:26pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3214

Tdi300 and Td5 have the same R380 gearbox. But that would be strange, as in 1st post you mentioned that you select reverse instead of 1st.

On lt77, reverse is next to 1st.
On R380, reverse is next to 4th, below 5th. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

19th Jun 2022 9:05pm

NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 95

Think it may be discovery 1. Here is pic

Click image to enlarge

20th Jun 2022 6:35pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3214

Check the Ashcroft site: https://ashcroft-transmissions.co.uk/produ...gearboxes/

It explains how to determine which gearbox you have. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

20th Jun 2022 7:06pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3214

Quick search with HRC1820 I get Discovery LT77 bellhousing.

So maybe you have a Discovery gearbox. You should be able to see the serial number stamped on the right side of the box, you can see it if you crawl underneath, there is a protrusion in the casting to create a flat surface for the factory to stamp the serial.

Normally with a discovery gearbox, the gearstick is a bit more aft compared to a Defender, unless the engine/gearbox have been shifted forwards which complicates things. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

20th Jun 2022 7:12pm

NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 95

Click image to enlarge

20th Jun 2022 7:23pm

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