Thread: Lockers

I've got a detroit locker in the back and a truetrac in the front of my Perentie. I was given them both, but if I had to build another car I would do exactly the same again. Having said that, I only use the Perentie offroad, I've got plenty of other cars that do a much "better" job of getting me from A to B. The positives of this set up- bare minimum moving parts or points of failure. No external components or connections required, they just do their thing. Very cheap compared to selectable lockers.
The biggest downside I had was the unbelievable weight of the steering with this combination and 255/85/16 MTs. I finally cracked a fitted a PS kit last week (easily one of the best things I've done to it), but it was a serious chore to park the thing or negotiate rocky sections of track before this.

Decide what's best for you based on how you use the car- if my Perentie was a daily driver and I wanted lockers I would spend the extra money and put selectable lockers in.

Originally Posted by Bearman

I was contemplating using 4.1 and maybe using the RFSV transfer gearing but I don't thing the small difference would be worth the capital outlay for the Salisbury cw&p's in that ratio. Has anyone done a speed/rpm graph for the 3 ratios with .996 and 1.123

Dotted line 0.996, solid line 1.123.



3.54 diffs:







4.1 diffs:







4.7 diffs:







Comparison of 0.996 with 4.7 (dotted) and 1.123 with 4.1 (solid):







So probably not worth it then!

Thanks Dervish, I think you have them back to front on the 3 top graphs. 1.123 is gunna give you more rpm than the .996.

Originally Posted by Bearman

Thanks Dervish, I think you have them back to front on the 3 top graphs. 1.123 is gunna give you more rpm than the .996.

Yes, you were right - typo. I've edited the post to correct it.

Dervish, where would i get a copy of this little program you use for doing these graphs?

Originally Posted by 67hardtop

front trutrac and rear detroit and where you got them from?

Hi there.

Just dropped in for a look as the 'lockers' heading caught my eye. Re a source for Detroits and Trutrac's on here, mine came from a guy who is a forum member. He trades as 'Lucky8Offroad' on the net. He shipped both separately so as to get under the $1000 'issue', but he was also by far the cheapest I could find (by nearly 50%) several years ago. And both cost not much more than $1200.

Going on from that, I have run A Detroit in the rear and a Trutrac in the front of several of my Land Rovers, and with upgraded shafts they have been truly awesome! I've used Airlockers in competition in the UK and found them a pain in the arse, as they wouldn't always unlock etc.. That is just my opinion though, and that said, the truck I now own has air operated lockers front and rear.. Hope to hell I don't get that stuck on a beach or the Simpson as it'll be an expensive tow!! Cheers for now!

My own view on this is that the Perentie is a no-fuss, non electrical vehicle where even power steering seems somewhat of a complication. This reason why these vehicles are great is that they are very simple and personally I think it's best not to complicate them when there is an alternative option.

Mine has a detroit rear with HTE shafts and flanges in the back. The front has ashcroft ATB, ashcroft CVs, HTE axles and flanges in the front. This setup has proven very reliable and works great in a tourer. Air lockers mean you need a switch and then you need an air line, then there's seals and other stuff to worry about. Keep it simple, it's what makes these vehicles so great.

Originally Posted by inside

My own view on this is that the Perentie is a no-fuss, non electrical vehicle where even power steering seems somewhat of a complication. This reason why these vehicles are great is that they are very simple and personally I think it's best not to complicate them when there is an alternative option.

Mine has a detroit rear with HTE shafts and flanges in the back. The front has ashcroft ATB, ashcroft CVs, HTE axles and flanges in the front. This setup has proven very reliable and works great in a tourer. Air lockers mean you need a switch and then you need an air line, then there's seals and other stuff to worry about. Keep it simple, it's what makes these vehicles so great.

Why not run vac lockers? Same is as the CDL then, so technically no added unreliability