Hilux/Hiace diff ratios

[larryex]

Does anyone know the highest diff ratio you can get factory in either a Hilux or Hiace diff head? anything higher than 4.3 to 1??

[evil_si]

i think tony at steelie gears was saying theres a 4.7-1

[larryex]

Higher ratio... not lower!!!!!!

[Mr Revhead]

i THINK some hiaces had a 3.9..... or maybe 4.1.

if i remember ill have a look tomorow

[strx7]

3.7, 3.9, 4.1, 4.3, 4.5, 4.875, 5.1 and 5.3 are the ratios they come in hiaces and hilux's

[larryex]

Ok thanks for that, I currently have a 4.3 and need to find a 3.9.

[strx7]

I assume thats in your JZ powered Hiace?

is it auto or manual?

My LN130 surf was originally a 4.55:1. I put the 2JZGE in it and then dropped down to a 4.1, but had been looking for a 3.9.
i'd be looking at a 3.7 as an option for a van

[larryex]

Yes thats the one mate. Its auto and with the 4.3 its got good pick up and ideal for the towing its going to do, but its revving a tad high at 100k. Either a 3.9 or 3.7 would be ideal prob the 3.9 as its still going to be doing heavy towing as opposed to high speed cruising.

[strx7]

what revs are you sitting at at 100k's in overdrive?

[larryex]

Around 2900 - 3000. bit high for a six. 2300-2400 would be good.

[strx7]

if you're currently pulling 2900 rpm at 100kph, the overdrive 'gear ratio' would be 0.85:1
which means a 3.7:1 diff would see you at 2500rpm
3.5:1 would see you at a shave under 2400rpm.

for towing all the time 3.7:1 would be a MINT ratio.
a 3.9:1 would see you a shave under 2600rpm

[larryex]

Cheers thanks for the tip. Ill pretty much use whatever one of the two I find first.