Thread: other than Ashcroft who makes LT230 underdrives?

Originally Posted by uninformed

Isuzu 6 speed?

Sure is, with 1:1 Hi, 5:1 Lo. 4.1:1 final drive.

Originally Posted by TonyC

For those with the Ashcroft underdrive, how often, and in what conditions do you use a 117:1 first gear.

Other than pay back to Isuzu County owners on steep down hills

Tony

I don't have one, because I have an Isuzu Landy but have driven with two who have them. Wayne uses his so he doesn't have to stop and wait for me to get ahead going up hills as well as down
A demonstration can be found in the fourth video in this post:

Tassie trip Sept/Oct 2012 (with a bit of qld, nsw and vic thrown in)

In rocks, wheel speed doesn't often pay off.


(And if there was an underdrive that fit the LT95 transfer I would consider one, but would go an Isuzu truck box in preference)

Originally Posted by TonyC

For those with the Ashcroft underdrive, how often, and in what conditions do you use a 117:1 first gear.

Other than pay back to Isuzu County owners on steep down hills

Tony

Firstly,I think it depends on the type of driving that you do,if it is worth fitting an underdrive.Obviously,if you are into touring,then an underdrive is just overkill.But if you drive the sort of places that I do,then the underdrive is a fabulous piece of kit.I use it whenever I think I will need precise throttle control,and I use it when descending very steep hills or dropoffs,again for maximum control.And my low range is a bit lower than 117:1

John, I was going to say you must have MD low range gears set and the hard to find 1.003-1, but I think you have another 2 speed case . This may be a silly question given the source of the gearbox, but how do you feel 5th and 6th would handle towing 2t fairly regularly?

Wayne, (and Pete if you are reading) How do you feel an underdrive would go with the new Puma's? Given they already have 65-1 first low....