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I did gear split charts for 4BD1 and both LT85 & LT95. Transfer ratios according to LRA are LT85 - 1.003:1, LT95 - 0.996:1. PM me your postal address and I will send them. They don't scan well.
Road speed formula is (60 x rpm) / (tyre revs per kilometre x overall gear ratio)
My 1988 N/A 110 Isuzu trans assembly (LT85 and LT230) untouched since delivery (except 3 LT85 rebuilds:mad:) had a 1.222:1 ratio. I think it was DaveHoos that mentioned some of the late Isuzu 110's etc were a hodge podge of whatever transfer cases were available at the time, some got 1.222, some 1.003.
The LT85 isn't up to the task behind a Turbo Isuzu IME, even N/A ones suffer numerous failures. To have a good one is the Minority.
JC
After a long day, the car is now back and moving!!! I can't drive it until I change the engine oil and filter. The ducting from my snorkel to the air filter has worn a hole in my oil filter :( At least now I know where all the oil was coming from.
I still have the trans cover out of the car, so tomorrow I'll visit clark rubber and grab a thick chunk of something to help insulate the hole where the gearstick is. The old bit isn't the right shape now.
Ashcroft Transmissions - Ratio Calculator
This might come in handy.
I have the 1.003 and it is too tall, maybe with a turbo it would work ok but then it might not last long:mad: