faster diffs for a hzj75 ute??

[Tapage]

i have a 1997 hzj75 ute. it has 9.5 rear and small high pin front. from what i have found the front diff is the same as an australian hilux ute, for which there are 3.7 gears. the intended solution for less rpm at 100k's is a 60 series rear and a hilux front to supply the gears (3.73)

The issue with your front diff it's High Pinion .. reverse cut setup .. and the hi lux not ..

 

[Turtle566]

Hi, I'm about to do the same thing with my 1994 HZJ75 ute,
This site and thread has given me
a lot of information, thank you,
I'm also running black diesel and that has given me a lot better
fuel Economy

 

[Locked79]

@Turtle566 what gearset are you planning to run. There are a couple of options now. As mentioned above, the hilux gearset won't work because the r&p are not reverse cut. Also, where are you located?

 

[Turtle566]

@Locked79 , I'm in Townsville, Queensland, you?, I haven't decided on exact gearset to run,
I'm looking to see what I can find
In the local area as to wrecked
LandCruisers, I'm also running
parabolic springs on the front.

 

[Locked79]

Rito, being in Aus makes things a little easier. The gearset you will need will be out of an 80 series. The 80 series here never got anything lower than 4.1:1 ratio so wrecking yards will be of no help. European 80's got the 3.73:1 and also the mythical 3.58:1 which I have never seen OEM.

The good news is that Marks 4wd adaptors have both 3.73 and 3.54 for sale. Also there is a difference between the 60 series 3.7:1 (37/10 r&p) and the 80 series 3.73:1 which has the 41/11 ring and pinion.

BTW I'm in Ayr just south of you.

 

[roscoFJ73]

Easier to jump up a size in tyres