Thread: Disco transfer box into a TD5 Defender

Looks like I may just get a high gear set from a Disco transfer case as someone I know is swopping his T-Box for one with a CDL and it will give me a chance to sort out my seals on the intermediate shaft. Speedo correction isn't really a concern as I'll get a speedo healer from ashcroft, as this is calibrated by using a GPS should end up with a more accurate speedo anyway
Never tried using the low range as a pull away gear for towing, do you just change from low to high like any other gearchange or is there a technique ?


When we tow and for the majority of the time the 90 is empty (except for 2 kids) and with the current engine mods I'm also running out of gears, although I try not to 5th gear pulls from as little as 60kmph no problems, it's amazing how quick you can get through the gears in a tweeked TD5

Hi Ned, yes I use low range for starting in steep hills of Heavy loads.

Plus it helps keep my high- low range selector free as well they can get a bit stiff.

If they're stiff when you go from low range to high range you tend to push hard and it beaks out of HR and goes straight through neutral into low range, you don't want that, ( big clang or crunch)

If you use your lever regularly you'll be able to go from low range to neutral to high range smoothly, just pause in neutral and lets the revs die down and ease it into HR. after a few goes it'll come easily to you.

You can go from HR -N-LR similar way. I don't do enough to be in practice but my friend can do it like a normal gear change. you can slow down in 1 st or 2nd gear HR, select TC neutral , select 2nd gear , blip the throttle and slip into TC -LR. I never bother I stop or almost stop to do the change HR-LR. My friend is a bus, truck, tractor driver, farmer, he makes it look easy. cheers simmo

Thanks,
It will be nice to tow in 4th at 100kph without it sounding like it's revving its nuts off, then just use 5th for downhills

What are you towing?
5th is more then strong enough to tow 2.5t+ without issue...
Just change back down on long hills (as you should) to keep EGTs lower..

Originally Posted by Tombie

What are you towing?
5th is more then strong enough to tow 2.5t+ without issue...
Just change back down on long hills (as you should) to keep EGTs lower..

What Tombie said, the 5th/reverse idler is fully supported, not cantilevered as a lot of 'boxes are so is fine to tow in 5th IMO. (and I do)

Originally Posted by Tombie

What are you towing?
5th is more then strong enough to tow 2.5t+ without issue...
Just change back down on long hills (as you should) to keep EGTs lower..

It's good to know 5th is strong enough but roughly going from standard 300nm to 460nm (TD5 inside's figures) I'd rather have a more usable 4th for towing and reduce the revs in 5th when I'm not. I do always drop to 4th on the hills but then I'm dropping down to 80kph to bring the revs down, with the conversion I'll be able to maintain a 100kph towing speed in 4th.

Originally Posted by nedflanders

It's good to know 5th is strong enough but roughly going from standard 300nm to 460nm (TD5 inside's figures) I'd rather have a more usable 4th for towing and reduce the revs in 5th when I'm not. I do always drop to 4th on the hills but then I'm dropping down to 80kph to bring the revs down, with the conversion I'll be able to maintain a 100kph towing speed in 4th.

I originally thought this too... but then I had to use third on some hills, which was too low...

Shifting on the fly between low and high range gets old too.

Originally Posted by nedflanders

It's good to know 5th is strong enough but roughly going from standard 300nm to 460nm (TD5 inside's figures) I'd rather have a more usable 4th for towing and reduce the revs in 5th when I'm not. I do always drop to 4th on the hills but then I'm dropping down to 80kph to bring the revs down, with the conversion I'll be able to maintain a 100kph towing speed in 4th.

Ask Blknight how his Dad (Greynight) vehicle is going...

Its got a particularly nice tune in it