1991, 200tdi LT77 won't drive

[LRNUTS]

Hi, I’m new to this forum, had LR’s for years but this is my first Disco. It’s a 1991 manual that I got for £100, non runner.

The problem seems to be somewhere between the engine and the wheels. I say this because the 200tdi engine runs fine, starts first time. The clutch seems to be ok. I dropped the gearbox, LT77, and transfer box out complete. I checked the clutch and all seems fine, even with the engine running nothing fly’s off. The input shaft to the gearbox seems ok and when I turn it the output shafts turn. I have checked 2 wheel, 4 wheel high and low and through the gears while out on the floor. The thrust washer etc seem fine but this is seems irrelevant as I managed to get it into the gears while in the car and still no drive. I have also checked back and front axles to see if the wheels turn while turning the prop. All seems to be working as I would expect; so why does the car not move?

Any help would be appreciated. I’d love to get it back on the road with a T-cut, clean and polish. It would turn the £100 Disco into a £1k plus bargain.

[errol209]

The problem seems to be somewhere between the engine and the wheels.

That narrows it down

The input shaft to the gearbox seems ok and when I turn it the output shafts turn.

So its not the main box then.

I have checked 2 wheel, 4 wheel high and low and through the gears while out on the floor. The thrust washer etc seem fine but this is seems irrelevant as I managed to get it into the gears while in the car and still no drive.

How did you check the transfer box alone? If you put the diff lock in, does turning the handbrake drum make the mainbox output shaft go round?

If you wedge the mainbox output up, what can you do with the two propshaft flanges with the difflock in and out? (e.g. twist one the other should go the other way and vice versa without the difflock, etc.)

Does the hi-low lever actually move the selector in the box?

Does the difflock rodding actually engage difflock?

I have also checked back and front axles to see if the wheels turn while turning the prop.

Diffs are OK then.

All seems to be working as I would expect; so why does the car not move?

You've missed something! You need to test each assembly seperately.

Any help would be appreciated.

We'll try, for a small cut

[LRNUTS]

That narrows it down

So its not the main box then.

How did you check the transfer box alone? If you put the diff lock in, does turning the handbrake drum make the mainbox output shaft go round?

If you wedge the mainbox output up, what can you do with the two propshaft flanges with the difflock in and out? (e.g. twist one the other should go the other way and vice versa without the difflock, etc.)

Does the hi-low lever actually move the selector in the box?

Does the difflock rodding actually engage difflock?

Diffs are OK then.

You've missed something! You need to test each assembly seperately.

We'll try, for a small cut

I've got plenty of those over the years, knocks and other injuries; or did you mean cash (it's a £100 bargin as I don't have ready dosh to buy the £k's it would cost to buy the latest and greatest).

I think I'l try the gearbox through the ranges again as this seems to be a possibility that I might of missed something there. I'll post back the results.

fingers crossed

[LRNUTS]

Checked over all the gear options and it works in all. Linkages a bit grubby with oil and crud but other wise ok. I have taken another look at the clutch. Once you get it off there seems to be more wear than I could tell with it on the engine. One or two springs are jammed at odd angles so may not help. I'm going to have to change these anyway and hope this does the trick.

[Les Henson]

I did the clutch on a 90 last week that looked ok (plenty of material on it still), but the centre had broken free, so was just spinning on the input shaft and not transmitting any drive to the gearbox.

Les.

[LRNUTS]

I did the clutch on a 90 last week that looked ok (plenty of material on it still), but the centre had broken free, so was just spinning on the input shaft and not transmitting any drive to the gearbox.

Les.

I'll take a look at that too, thanks

[western]

I did the clutch on a 90 last week that looked ok (plenty of material on it still), but the centre had broken free, so was just spinning on the input shaft and not transmitting any drive to the gearbox.

Les.

Mine did that while driving to work, see my photo's on page 2, here

[LRNUTS]

I changed the whole clutch over at the weekend and managed to get her moving. Now I've got a leaking master cylinder so going to change that too. As I'm doing it I might also do the slave cylinder. Not going for a repair kit as I've found they are only a short fix and eventually you have to change the lot anyway.