S

SM1543

New Member
Within the last year, It's slowly been getting more and more difficult to get into 1st gear whilst moving at any speed other than a dead stop. It will just grind until you are stopped, then it will very easily get into 1st with no other issues at all. All other gears are also smooth as can be!

One thing to note, we do quite a bit of deep wading. I recently changed the oil in the gearbox and to no surprise, it was all milky (I have extended the breathers, but they appear to have been ripped out at some point). We've probably been driving around like this for a while, so I'm sure it hasn't helped ;)

I've been wanting to change the transfer case to one with diff lock (mine doesn't even have the nipple), so unless there is something easy/cheap to fix this issue, I think I might just stick a new gearbox in alongside it!
 
GrantM123 said:
Within the last year, It's slowly been getting more and more difficult to get into 1st gear whilst moving at any speed other than a dead stop. It will just grind until you are stopped, then it will very easily get into 1st with no other issues at all. All other gears are also smooth as can be!

One thing to note, we do quite a bit of deep wading. I recently changed the oil in the gearbox and to no surprise, it was all milky (I have extended the breathers, but they appear to have been ripped out at some point). We've probably been driving around like this for a while, so I'm sure it hasn't helped ;)

I've been wanting to change the transfer case to one with diff lock (mine doesn't even have the nipple), so unless there is something easy/cheap to fix this issue, I think I might just stick a new gearbox in alongside it!
Click to expand...
When I first started driving, many moons ago, lots of cars didn't have synchromesh on first. It wasn't seen as necessary. You just rolled to a stop then put it in gear. If you really wanted to put it in on the move, you double-declutched. ;)
My Disco 1 Anniversary is a bit crunchy in second as well, if you rush the change. I like double-declutching! I is too old skool!:):):):)
 
ronsealdeath said:
If its an r380, running them on mtf94 can help over ATF
Click to expand...
I wanted to give it another flush, so I'll give this a go. Are additives such as molly slip any good?

Stanleysteamer said:
When I first started driving, many moons ago, lots of cars didn't have synchromesh on first. It wasn't seen as necessary. You just rolled to a stop then put it in gear. If you really wanted to put it in on the move, you double-declutched. ;)
My Disco 1 Anniversary is a bit crunchy in second as well, if you rush the change. I like double-declutching! I is too old skool!:):):):)
Click to expand...
I struggle for power on any sort of incline unless in 1st due to the bigger tyres. I need to get that sorted soon with different gearing. I'll give double clutching a go, makes sense if the synchro has disappeared :D
 
GrantM123 said:
I wanted to give it another flush, so I'll give this a go. Are additives such as molly slip any good?


I struggle for power on any sort of incline unless in 1st due to the bigger tyres. I need to get that sorted soon with different gearing. I'll give double clutching a go, makes sense if the synchro has disappeared :D
Click to expand...
It's a bit harder in a 4x4 with a tranny box, obvs, but persevere, I'm sure you'll have fun. But I understand the need for you to do it now!
 
I would guess that your water ingress is via the input shaft seal, via the bell housing. My breathers were watertight. My gearbox was full of chocolate milk, and a few months after changing the oil, the input bearing gave up the ghost. The input seal was shagged, and there was at least a 1mm gap.

Input seal.jpg
 
tilly2 said:
I would guess that your water ingress is via the input shaft seal, via the bell housing. My breathers were watertight. My gearbox was full of chocolate milk, and a few months after changing the oil, the input bearing gave up the ghost. The input seal was shagged, and there was at least a 1mm gap.

View attachment 252392
Click to expand...

I'm likely going to be putting in a used gearbox/transfer case soon, I'll be sure to replace those seals when I do
I changed the oil in the transfer case today and it looks pretty ok (albeit quite black, but no water)
 
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