Landrover 90 speed

toms3 · Mar 23, 2015

Would possible and would it be a big job to change to a disco transfer box?

trax · Mar 23, 2015

toms3 said:
Would possible and would it be a big job to change to a disco transfer box?

depends on your skills. you happy refitting an engine? if so, it's easy

bluedog333 · Mar 23, 2015

Unless you find you've a 1.6 tranny fitted I don't think the transfer box is the problem. You should definitely be able to do 60 mph comfortably with a standard 1.4 tranny in.

trax · Mar 23, 2015

what tyres you running as well?

cornish rattler · Mar 23, 2015

bluedog333 said:
That makes sense, interesting to know!

Yeah it does didn't think of that

THEengineer · Mar 23, 2015

i go up motorways daily in my probably well worn,152k 300tdi in a 110,it tops out at 78 mph down hill,but its 70 in a strait line quickly enough

samhillawi · Mar 24, 2015

My 200TDI ,(out of a Defender) is a replacement for the 2.5TD. Bubbles along at 55-60 quite happily if I push her up to 70 she starts to scream a bit so I rarely go above 60. Thats a 200TDI into a 1987 90 with no other Modifications. I have 15" rims but I cant remember the Tyre height.

Pauleh · Mar 24, 2015

samhillawi said:
My 200TDI ,(out of a Defender) is a replacement for the 2.5TD. Bubbles along at 55-60 quite happily if I push her up to 70 she starts to scream a bit so I rarely go above 60. Thats a 200TDI into a 1987 90 with no other Modifications. I have 15" rims but I cant remember the Tyre height.

I have a 200tdi in my '87 and with the 1.4 tbox it screamed at anything over 45 so I put in a 1.2 tbox and now it'll sit at 50-60 comfortably. Wonder what might be different? Diffs maybe? I think mine are standard but can't really be sure

cornish rattler · Mar 24, 2015

Pauleh said:
I have a 200tdi in my '87 and with the 1.4 tbox it screamed at anything over 45 so I put in a 1.2 tbox and now it'll sit at 50-60 comfortably. Wonder what might be different? Diffs maybe? I think mine are standard but can't really be sure

That doesn't sound right i would have thought with a 1.2 tranny box it would happly sit at 80 +, my 1988 90 with i think is a 1.4 tranny box ( no serial no stamped or sticker ) will start to scream at around 65 and can easily carry on up to 80 so something doesn't sound right to me there.

there could be a chance someone has fitted series diffs for what ever reason or your tranny box is not a 1.2

Pauleh · Mar 24, 2015

cornish rattler said:
That doesn't sound right i would have thought with a 1.2 tranny box it would happly sit at 80 +, my 1988 90 with i think is a 1.4 tranny box ( no serial no stamped or sticker ) will start to scream at around 65 and can easily carry on up to 80 so something doesn't sound right to me there.

there could be a chance someone has fitted series diffs for what ever reason or your tranny box is not a 1.2

Not sure about the diffs but I got the tbox from Ashcrofts and definitely makes a massive difference compare to before. How would I identify if I have series diffs?

Sorry for hijacking the thread, at least it's still on topic!

cornish rattler · Mar 25, 2015

std diffs on a 90 should be 3.54-l meaning 3.5ish full rotations of the prop to 1 full rotation of the wheel, series diffs are 4-1 meaning 4 full rotation of the prop to 1 full rotation of the wheel, if that makes cense

flat · Mar 25, 2015

What is considered the standard defender diff? 1:2, 1:4, 1:6?

Pauleh · Mar 25, 2015

cornish rattler said:
std diffs on a 90 should be 3.54-l meaning 3.5ish full rotations of the prop to 1 full rotation of the wheel, series diffs are 4-1 meaning 4 full rotation of the prop to 1 full rotation of the wheel, if that makes cense

Thanks, I'll get counting!

Pauleh · Mar 25, 2015

flat said:
What is considered the standard defender diff? 1:2, 1:4, 1:6?

1:4 as far as I know.

D90mitch · Mar 25, 2015

What's acceleration with the 1.2 like?

Pauleh · Mar 25, 2015

D90mitch said:
What's acceleration with the 1.2 like?

Mine's pretty nippy. When I had the 1:4 I'd just pull away in 2nd because 1st was too low.

My 200tdi came from a Disco and I've played with the off-boost fuelling if that helps.

toms3 · Mar 25, 2015

Hi guys the tyres are 205 80 16. The diffs are all the old 10 spline ones.

I don't think I'll change the transfer box I'm happy cruising at 50 with the stereo turned up lol.

I'm looking at caravans so it may come in handy for towing that?

trax · Mar 25, 2015

toms3 said:
Hi guys the tyres are 205 80 16. The diffs are all the old 10 spline ones.

I don't think I'll change the transfer box I'm happy cruising at 50 with the stereo turned up lol.

I'm looking at caravans so it may come in handy for towing that?

tyres will be knocking the top end down a bit, esp if you do have a 1.6 lt230. faster acceleration though.

Derby7889 · Mar 26, 2015

I need to take mine on a motorway run, I found yesterday that since I had my Injector pump throttle spindle re-bushed and resealed I can get a bit more out of the old girl and it doesn't sound as loud as it did before, Get up to 60 and acceleration is no existent though haha.

cornish rattler · Mar 28, 2015

Pauleh said:
Thanks, I'll get counting!

Any luck

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