70 series rear diff upgrade

[gary74mid]

Hi guys,
I'm wondering if its possible to exchange a 74 series mid wheel base rear diff (drum brakes) with a newer model 75 or 79 series rear diff with disc brakes?
Also what year model did they come out with disc brakes?
I'm also looking at putting a coil diff and radius arms in the front, has anyone encountered any problems doing this? As far as I'm aware you have to swap the H55 gear box with a H105 gearbox and transfer case any help, advise or pictures would be greatly appreciated.

 

[ozcrusier]

Gary welcome to the forum mate.
Whats up with your brakes to warrant rear rotors and calipers.

 

[gary74mid]

Gary welcome to the forum mate.
Whats up with your brakes to warrant rear rotors and calipers.

I HATE DRUM BRAKES! lol.
I'm putting a 79 series coil front diff with 5 stud and figured as the rear diff needs a full rebuild minus the centre I'm wanting to put a rear 79 series diff with 5 stud in the back. So a 5 stud front and rear.

 

[ozcrusier]

Sounds great post plenty of pics as you go. The info you seek is in the forum but may take some reading to locate it.

 

[Hulsty]

Complete rear diff should just bolt in, will need probably a VDJ76 handbrake cable and a new brake master cylinder. Measure tailshaft flanges I am not sure if they are the same or not.

 

[clintnz]

The later model JDM 74s we get in NZ had rear discs but not sure on what year.

Don't those 79s have some crazy axle width difference front-back?

Another idea for you: do what I did & use an 80 series rear axle with a GQ Nissan front axle - cheap, common, same width & ratios but a much stronger front R&P. A fair bit wider than std 74 but that is a big plus if lift & large tyres are also in the plan.

Cheers
Clint

 

[ozcrusier]

Nice sounds like a great idea for the hzj75 and later with the 8 inch hilux diff
Cheers

 

[gkanai]

100 mm difference (shorter) in the rear than the front with the VDJ/GRJ axles.