Jonnyb1990

Jonnyb1990

Well-Known Member
Afternoon,

My new Job requires me to drive longer distances then I used to, now mainly motorways,

Having 6 gears over 5 gave me an idea,

Is there an easy way if anyway to mate a 300tdi engine (the original) to an out sourced gearbox from a TD5 defender ?

Am I wasting my time ?
 
300 wont mate to a TD5 box but I'm selling a brand new short bellhousing R380 (but can convert to long if needed) gearbox with higher ratio gears in it?

Will bolt straight up to the 300tdi


Mines the 53J so better motorway ratios I suppose looking at it Links
 
Hadt thought about the transfer box,

Out of curiosity, why cant a 300tdi be mated to a TD5 gearbox ?

Either way it explains why I couldn't find any info about mating the two together,

Would the Disco's transfer box affect they way it drives in offroad/snow & icy conditions ?
 
because its a different bellhousing and a few other mods too, 68 suffix instead of 50's

transfer box will only differ in high, low is the same
 
Dr_evil said:
because its a different bellhousing and a few other mods too, 68 suffix instead of 50's

transfer box will only differ in high, low is the same
Click to expand...


Ok that makes sense,

Can a R380 accommodate an "overdrive" ?

Or is my best bet the transfer box ?
 
think you can get hold of GKN and Roverdrive units for them but seriously no need, either fit a higher ratio main box or higher ratio transfer
 
THEengineer said:
thought 300 tdi and td5 both used R380 boxes?
Click to expand...

they do but bell housing is longer as is input shaft ,also you cant just chenge input shafts so easily as 300s tend to be j suffix with smaller input bearing and td5 k suffix on with larger bearing which also means case and front cover differ
 
I thought they used different ones due to a 6th gear,

Still got some options to ponder on now though !

Cheers guys !
 
Jonnyb1990 said:
Then thats what I was thinking of :rolleyes:

Take it that its the same scenario ?
Click to expand...

It has been talked about before 6th in a puma is not much different than a r380 5th. Change to a 1:2 transfer box, low range is the same in them all. This will give you better motorway driving and MPG
 
jamesmartin said:
they do but bell housing is longer as is input shaft ,also you cant just chenge input shafts so easily as 300s tend to be j suffix with smaller input bearing and td5 k suffix on with larger bearing which also means case and front cover differ
Click to expand...

right i have learned something cheers james(and doc)
 
Jonnyb1990 said:
Hadt thought about the transfer box,

Out of curiosity, why cant a 300tdi be mated to a TD5 gearbox ?

Either way it explains why I couldn't find any info about mating the two together,

Would the Disco's transfer box affect they way it drives in offroad/snow & icy conditions ?
Click to expand...

Td5 input shaft is different to a 300 tdi even though it's the same box in principal.

I did a modification on my old Discovery 300tdi which involved changing the old fifth gear to a V8 fifth gear.

This reduces the motorway cruising revs by about 500 rpm. giving a higher MPG.

A new fifth gear costs around £100 and then labour to fit it.
 
All you need to do is get the local place to pull the collar and undo the 32mm nut then you can swap it over, get them to tighten nut up again and you can put the box back together!


Not even 5 mins worth of labour for them :) thats how I did mine
 
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