R380 tbox onto lt77

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Kerbus24

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• Dec 15, 2019

• #1

evening people, after a couple months driving my 200disco with a defender t-box I'm now fed up of how low geared it is. Flat out is 55 at just over 3k revs. Got a 96 300tdi sat in the yard with box still on it so was wondering if the r380 t-box bolts up to the lt77 box?
Ta
Kerby.

 

Kev12

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• Dec 15, 2019

• #2

Not 100% but pretty sure it's the same transfer box

 

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Hicap phill

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• Dec 15, 2019

• #3

Yep will fit.

 

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Kerbus24

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• Dec 15, 2019

• #4

Spot on, I'll whip it off over next couple days and get it over the pit and swap em over

 

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lynall

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• Dec 16, 2019

• #5

Yes will fit.
But to avoid future confusion the r380 is the 300 gearbox, lt77 is the pre 300 gearbox back to the dawn of time ann available in many ratios, the transfer box is called an lt230 available in umpteen ratios, ratio is on a sticker on the rear of the tfer box.

 

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Hicap phill

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• Dec 16, 2019

• #6

@Kerbus24 Forgot to ask what size tyres you running then?

 

kevstar

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• Dec 16, 2019

• #7

lynall said:

Yes will fit.
But to avoid future confusion the r380 is the 300 gearbox, lt77 is the pre 300 gearbox back to the dawn of time ann available in many ratios, the transfer box is called an lt230 available in umpteen ratios, ratio is on a sticker on the rear of the tfer box.

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Ive never had a sticker on any of mine lol usually have to wire brush the casing to see the stamped numbers
then check ashcrofts site to see what ratio it is.

 

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lynall

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• Dec 16, 2019

• #8

Hicap phill said:

@Kerbus24 Forgot to ask what size tyres you running then?

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155/13

 

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Hicap phill

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• Dec 16, 2019

• #9

@kevstar normally by the fill plug.
But as it’s a landrover part/sticker it would have fallen off by now

 

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Kerbus24

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• Dec 18, 2019

• #10

Hicap phill said:

@Kerbus24 Forgot to ask what size tyres you running then?

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At the mo I'm on the all terrains which are 245/65/16 I believe but have just repaired a hole in my 35" 285s so will just use them on play days

 

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Hicap phill

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• Dec 18, 2019

• #11

That should be ok for the speedo drive then.
I find I’m not into 5th until 60. Then it just sits there then. I’m running 7.50s

 

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Kerbus24

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• Dec 18, 2019

• #12

Hicap phill said:

That should be ok for the speedo drive then.
I find I’m not into 5th until 60. Then it just sits there then. I’m running 7.50s

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I'm in 5th by the time I hit 35 then sits screaming at 50ish at 2.5/3k revs

 

300bhp/ton

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• Dec 18, 2019

• #13

Kerbus24 said:

At the mo I'm on the all terrains which are 245/65/16 I believe but have just repaired a hole in my 35" 285s so will just use them on play days

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35" 285's?????

If you want to run the Defender 1.4:1 transfer box, you'll want a 7.50 x 16 or a 235/85R16 tyre. You'll then have identical gearing to a Defender....