Deliberations – part 2 – gearboxes

Ok, so the reason the vehicle came off the road in the first place was that the gearbox (and/or transfer box) went pop…

So, do I stick with the LT77 or upgrade to an R380 – which was supposedly the stronger, better gearbox….

And if I go R380, standard box or a stumpy?

And do I recondition my existing boxes, or replace them with second hand?

So, firstly, the different boxes…

The LT77 is an older design, and not as refined as the R380. The R380 can supposedly handle more power and torque, as well as running quieter. It can also be fitted with an oil cooler which helps it run cooler – better for the box, as well as not heating the cab as much…

The R380 was designed to fit behind the 300tdi engine I have. It’s possible that some or all of my problem has been caused by putting the new lump on the old box. So probably not an LT77. Particularly as I’d eventually like to tweak the engine a bit to get a few more horsies in there, and some extra torque.

The R380 comes in two variants, the standard and the stumpy. The standard box is longer than the LT77, so needs the engine moved forward. The stumpy is a modification which allows a straight swap from LT77.

If I’m going for a replacement chassis, I would probably be best off getting a standard R380. This will allow me to use the engine I have, with standard positioning – and so standard props, pipework, exhausts, wiring, etc etc. I’ve previously had to modify brand new parts to fit!

All three boxes will use the same transfer box, so I guess it depends what mine looks like when I get it off…

Just as a rough comparison, here’s some rebuild costs…

LT77 Rebuild816200 surcharge
R380 Stumpy rebuilt1680includes oil cooler etc
LT230 Rebuilt1080includes £200 surcharge
R380 Rebuild1488includes oil cooler