Outer Limits 4x4 Board

Hi All,

I've got an air locker out of my old 60 series (an old Robertsons locker - still in really good condition with new seals).

The question is, can I put it into the rear of my diesel 80 series (it is a complete diff with gears), or should I off load it and buy a front locker for my 80?

I tend to want to go for a front locker because:

1. I prefer front lockers (don't want to start a new argument, but I tend to find them more valuable than rear lockers).

2. Fitting a front locker will help fix the dreaded weak 80 series front diff.

Any thoughts???

Tom.

Hi Tom

I thought front locker ( you are right in the R&P reverse cut issue solved with a front locker in 8" HP ) it's complement for rear locker ..

Actually ARB include in the design you must engage the rear locker prior the front .. at same as the factory 80 e-lockers.

Anycase at your question it's I'm not sure with the locker thar you describe ( don't know ) but if you have a ARB SF locker as RD08 you must need to modify it to FF locker ( if your 80 it's sure FF ) like a RD02 to use with your 80 series rear axle ..

The same ring diameter 9.5" same spline count but just sigly difeferent setups at the pinion position ?

If you have constant 4wd, then you shouldnt swap the diff...its ratio is 4.11 and whats in there is 4.10...not much diff-er-ence but enough to upset a copstant...it will physically fit and bolt straight in.
Andrew

Tapage wrote:Hi Tom


Actually ARB include in the design you must engage the rear locker prior the front .. at same as the factory 80 e-lockers.

unless you only have a front locker then you can use it when ever you want. if you have front and rear air lockers you can cut and join some of the wires in the loom, then you can engage either locker at any time.

.01 0f a ratio is stuff all and shouldnt give you any trouble, i have an 80 series diff in the rear (4.10) and a 60 series diff in the front (4.11) and when engaged in 4wd its never bound up or made any noises, its the same as having slightly different amount of tread on the front tyres compared to the rear.

it is entirely up to you, if it was me and funds wernt an issue ide stick a front air locker in there, but if i needed a quick traction fix ide stick the robertson locker in, that is if its in good cond.

my 0.2C
Troy

If your front diff has a lower ratio wouldn't if your in on-road 4wd the car computer would transfer the power to wheels with least resistance ie front wheels cause of the higher revs it produces?

My 80 is a standard, so it has barn doors, part time 4wd and a slow 1HZ (hopefully funds one day soon will allow me to stick a turbo on).

Is the general thinking that a 4.10 vs 4.11 diff ratio nothing to worry about while 4 wheel driving? I always thought that even a small difference like that was not good.

Tom.

nah shell be sweet. heaps of people do it. there is a thread on pirate about it where people are running like 4.39 with a 4.23 sort of thing. so i dont think itll matter THAT much.

information given is not a direct quote, i just saw it a few months ago and remembered. differances are not that big in the pirate article i think.

steven101 wrote:If your front diff has a lower ratio wouldn't if your in on-road 4wd the car computer would transfer the power to wheels with least resistance ie front wheels cause of the higher revs it produces?

Nahhhh, no technical doo-dars in 80 series cruisers, they dont have traction control. they have a center differential which (to my understanding) works the same as a normal diff, it allows the front and rear drive shafts to turn at different speeds for cornering. They have a center diff lock button which does exactly that, locks the centre diff so the power is distributed 50/50 to front and rear shafts no matter what the circumstances, thus making it act like every other part-time 4x4 when in 4wd.

My 80 is a standard, so it has barn doors, part time 4wd

If thats the case your sweet, its a tiny ratio difference not once has it ever posed a problem for me.

Troy

Cool.

Thanks to all those whose responded to my questions.

Looks like I'll be lying under the car for an hour or two on the weekend fitting the locker - love the smell of gear oil...

Still gotta sort out that weak front diff though soon. I'm always a bit careful reversing while wheeling but I'm a bit paranoid that I'll break it one day.

Tom.