Gearbox Dilemma

[DSLiverpool]

Guys how do you know if you need a gearbox flush or a valve recon?

Hesitant on light throttle
Changed down a little roughly
Perfect on motorway
Not great round town
Worse when warm

65k / 5.0 / 2010

I don’t want to get a flush if it needs a rebuild.

[coetzeeh]

Sorry I cant help but had a gearbox oil service done (not a flush) on my 3.6 TDV8 and was surprised how much smoother the gearbox was after. Felt a bit notchy on gear change before.

[DSLiverpool]

Cheers - thankfully it’s not the gearbox, we will check codes tomorrow and see if it’s a duff sensor

[bakerstreet]

Flushing the oil doesn't fix anything in the gearbox. People do it because:

the garage recommends it
Cheaper than a new box or a transfer box.
Service schedule

My rule of thumb is the box should have new oil every 40k.

Some of the symptoms for a TC on its way out:

Juddering under load
Fluctuations on rev counter at motorway speeds
Slow to change from say 5th to 6th until its warm (That is certainly a trait of the 6Sp box in the Discovery)

Clunky down changes something wrong with the box its self. Sorry, I can't say what that would be.

[DSLiverpool]

All sorted it was a faulty MAF on one bank - phew

[cayman-black]

good news. At that mileage, a GB oil change wouldn't hurt.