10p TD5 90 have just lost drive in high and low box, however if diff lock is engaged, still have high and low box and the car drives
can select all the gears
Nothing has fallen off that is immediately apparent, any ideas
was just commenting the car is the best it has ever been 1999 90 TD5 CSW
2006 110 TD5 HD Commercial

Could be a failure in a diff, a CV joint, a snapped half shaft or even one of the drive flanges. With one front wheel jacked up, turn the wheel by hand and see if you hear any grinding noises. Darren

2013 Defender 110 USW XS
2013 Discovery 4 XS

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

MY 110 USW BUILD THREAD - MY 200tdi 90 BUILD THREAD - Instagram: @landroveranorak

Most likely drive flange (probably rear offside).

Take it out of difflock and let it tick over in gear, handbrake off, footbrake on, clutch in, while an assistant looks to see which propshaft is turning. Whichever one turns, the problem is at that end of the vehicle.

problem is at the front end

front diff magnetic drain plug covered in swarf

front wheels of the ground , when either wheel turned, nothing else rotates same with front propshaft

strip down tomorrow looks like a failed front diff 1999 90 TD5 CSW
2006 110 TD5 HD Commercial

Oh dear, front diff. Unusual on a TD5 90 but that'll be no comfort. There are many upgrade options if you're so inclined, and cheaper than new genuine parts.

do tell 1999 90 TD5 CSW
2006 110 TD5 HD Commercial

A common issue with front Rover diffs are the crown wheel bolts loosening and consequently shearing.
It happened to ours last year. Symptoms were some loud bangs in the transmission.
Oil was as clean as could be, but the diff pan contained broken bolts and pieces of gear teeth. They didn't come out with the oil since the drain hole is not the lowest point . You might want to check with a small magnet.
A while ago a bloke on another forum had all the crown wheel bolts broken, but miraculously the gears survived unscathed.
Other possibility are broken differential gear pins.

I installed an Ashcroft ATB as an upgrade. Plenty of opinions on the forum.

j Antares Treadwell, a MY06 110 Td5 in Chawton White

Yup, happened to mine (2000MY 110) as well, just as described. I was convinced it was a transfer case issue. Simple fix in the end. One bolt One! 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)

I too thought it was the transfer case first, so I ended up rebuilding that too. I even drove a couple of weeks with the front drive shaft only during which time nothing special happened, so the logical conclusion was that it was the TC's diff. I was almost disappointed when it turned to be OK.

J Antares Treadwell, a MY06 110 Td5 in Chawton White

davidblythe wrote:

do tell