Thread: Gearbox issues!

Hi,
I'm no expert by a long shot however I have spoken at length to the RAEME boys at work about our Landrovers,
I have been told that the first trails vehicles where fitted with 5speed transmissions and performed well only being discounted because defence wanted to limit top speed to 80kmh. Apparently due to the safety concerns with towing the 1/4 ton trailer. And,
The box is capable of being converted to a 5 speed as defence simply optioned the Range Rover box minus 5th as this was the only box available that could handle the 3.9 litres torque at the time. Therefore one would assume that the tail shaft should be ok.
Have you checked prices on the Ashcroft Transmissions website? I'm sure you could get one delivered much cheaper.

The LT95 4 speed you have is about the strongest box LR ever used, and is much stronger than the 5 speed. The torque pulses from the 4BD1 engine give boxes a hard time. Shop around for a decent second hand box. The Perentie boxes have the roller taper bearing conversion in the transfer case, and is worth keeping - they are an expensive bit of kit.

Parts for a rebuild are around $1000 so the price you've been quoted seems ok I suppose. Are you handy with the spanners? You could at least remove the box yourself and save some dollars. Probably not a beginners box to try and rebuild yourself.

We need Bearman to chime in now, not much he doesn't know about these units.

Originally Posted by bacicat

The LT95 4 speed you have is about the strongest box LR ever used, and is much stronger than the 5 speed. The torque pulses from the 4BD1 engine give boxes a hard time. Shop around for a decent second hand box. The Perentie boxes have the roller taper bearing conversion in the transfer case, and is worth keeping - they are an expensive bit of kit.

Parts for a rebuild are around $1000 so the price you've been quoted seems ok I suppose. Are you handy with the spanners? You could at least remove the box yourself and save some dollars. Probably not a beginners box to try and rebuild yourself.

We need Bearman to chime in now, not much he doesn't know about these units.

Thanks bacicat, I take it you think I should get her overhauled. The quoted rebuild price included the transfer case. At least then I'll know exactly what I've got.

Appreciated, Deaf Ender.

Originally Posted by landy

Hi,
I'm no expert by a long shot however I have spoken at length to the RAEME boys at work about our Landrovers,
I have been told that the first trails vehicles where fitted with 5speed transmissions and performed well only being discounted because defence wanted to limit top speed to 80kmh. Apparently due to the safety concerns with towing the 1/4 ton trailer. And,
The box is capable of being converted to a 5 speed as defence simply optioned the Range Rover box minus 5th as this was the only box available that could handle the 3.9 litres torque at the time. Therefore one would assume that the tail shaft should be ok.
Have you checked prices on the Ashcroft Transmissions website? I'm sure you could get one delivered much cheaper.

Hi Landy, I'll check Ashcroft thanks mate. Thanks for the good oil.
Deaf Ender.

The perentie Never had a 5 speed

if you have a 5 speed "perentie" box what you have is an r380 from one of the td5 110's that were bought into guiseas a perentie late in the piece.

no, its not going to bolt straight onto or into your 4bd1 perentie.

parts for a mainbox overhaul are between $500 and $2500 depending on what can be salvaged

parts for the Tcase side go about the same

$3-4k is an average ball park.

a quality workshop working effeciently and quickly generally wont let you get away with paying less than $1.5K for a rebuild alone as there are some things that while you technically can reuse experience and best practice says you dont.

Thanks blknight, I'll determine whether it's an R380. Is it possible to use the R380 on the 4bd1 at all, perhaps with minor modification?

Deaf Ender

Depends on your definition of minor modification

you might need to have an adaptor plate /flywheel housing made up and you might need to change the friction plate

an lt85 with an lt230 should be just about a drop in fit but you'd have to get the diesel version. IT wont last as long as the lt95 though

Originally Posted by Blknight.aus

Depends on your definition of minor modification

you might need to have an adaptor plate /flywheel housing and you might need to change the friction plate made up. I think the input shaft lengths are different.

an lt85 with an lt230 should be just about a drop in fit but you'd have to get the diesel version. IT wont last as long as the lt95 though

Sounds like I should stick with the Lt95 then.
Much appreciated,
Deaf Ender.