Thread: Is a Getrag MT82 a possibility for a 4BD1-T

Originally Posted by Adrian18

I think the r380 first gear ratio u have quoted is the v8 petrol one defender uses 3.692 ...

You're right, that makes much more sense. I had been using this website which says the diesel first gear is 3.39.

Corrected 300Tdi/TD5 R380

Originally Posted by Lotz-A-Landies

What about an Isuzu 6speed double overdrive like the MXA6S?

1. 4.987
2. 2.870
3. 1.684
4. 1.000
5. 0.728
6. 0.626
7. 4.774 Reverse

Well this gearbox is pretty much an MSA-5R with a 14% taller gear. There's two ways you could go; use a 1.003:1 LT230 and not use 6th much, or use a 1.221 LT230 and have a short first. Either way, it seems a bit of a waste having those two OD gears separated by only 14% while the first four are separated by over 40%.

1.003:1



1.221:1

Agree about the lower gears and the 1003:1 is too high.

What I like is that with the 1.221:1 transfer the lower gears will be able to get a heavily loaded (or even higher unladen mass) vehicle moving to highway speed and the three top gears used to keep the revs up in the 1500 to 2500 RPM range to maintain highway speed. Note that 5th is about 1800RPM at 90KPH and 4th 2500RPM. Compare that to the 0.996:1 LT95 where 2500RPM in 3rd is only 70KPH.

I gather that to use a MXA-6 box you need to run the transfer divorced/remote.

You would have to ask those that have done the mxa or noel may know, but pretty sure its not a straight bolt up to the msa adapter housing and shaft.

What I understand (but have not confirmed) is that the 6th gear is a housing behind the 5th, or at least a longer mainshaft with all the 5R or 5S gears in front. But I thought I remember something about the box being too wide to close couple to the LT230.

Originally Posted by Bush65

The reason an MXA6 can't be close to an LT230, is the width of the extension housing where 6th gear is located. Because both 5th and 6th gear are overdrive ratios, the diameter of the gear wheel for 6th is very large and thus the width of the extension casing is greater than the main gear case. The front extension housing on the LT230 is quite long and won't fit alongside the MXA6 case.

So the LT230 has to be pushed back behind the MXA6 by somewhere near the length of the front extension housing. In a rangie, and I presume disco, there is a structural cross member (for seats and seat belt anchorages) integral with the floor that won't allow the LT230 to be moved back very far.

From here: Dry sump?

lt95 with 996 and an underdrive or 1.122 and and overdrive planetry maxitdrive pto slpitter.

Originally Posted by Blknight.aus

lt95 with 996 and an underdrive or 1.122 and and overdrive planetry maxitdrive pto slpitter.

AFAIK there aren't any planetary overdrives for the LT95. Roamerdrive (Roverdrive) were considering but no movement on that yet.

I don't know if you can install an overdrive on a Perentie LT95 box because of the bottom PTO interface.

Or am I missing something?

Correct Diana, you can't have a PTO unit and an overdrive on the LT95 at the same time. It's one or the other unfortunately. OK if you don't want a PTO winch or a 6by drive unit (Perentie)