Thread: Detroit Tru Tracs, report....

Justin, are these the centres that are locked then unlock when you are turning ? or are they like an lsd ?

well, they are the 'monotreme' of the drivetrain world, as they differentiate, and sort of lock, and have no clutches or cones etc, but work on a trio of planetary type 'worm' gears revolving around the side pinion. Have a look at the opposite lock website, they have a good exploded diagram there.

They are really a gear type LSD, very positive yet allow for easy turning in a front application. Based on the Gleeson -Torsen type differential, Audi use them as a centre diff in the early Quattro.
I'm impressed anyway!

JC

Hi Justin
I dont know if you saw the pics and vids I posted on our last Harvey trip.That red 90 has a front true track and rear detroit locker.It really goes well.
I would like to do the same for BlackBetty.
Andrew

Jusin,

I was going to go down this route before I went ARB lockers. The downside I have been informed about is when traversing across a slope, especially with locked diffs, is the side slip that occurs. I have been told about this over and over, it is definately a situation with a locked diff such as mine or with the detroit auto locker, but I am unsure about the True Tac. What have you found or have you not tried it yet? Worth giving it a try on a slippery side slope.

I recently did a trip and was tail end charlie. We traversed across a slight side slope and all the others made it across without any problem. I had my lockers in and had forgotten about them when I started to slip sideways. Even though I tired to correct the slip by turning up the slope the slipping got worse. I stopped (had to as I was going to roll if I went any further). I noticed the lockers and switched them off then drove straight up out of there and continued on without any problem. Since found out it is a charateristic of the lack of differencial speed for higher wheel compared to the lower wheel causes the car to literally slip sideways.

What made you decide on TrueTrac for front and rear? Other threads on this topic usually have people fitting the "LSD" on the front and a locker on the rear.

I`ve got a detroit locker in the back of my 110, for the driving I am doing now which is mainly sand it is perfect, as it really is fit and forget, all you have to do is worry about driving it. I think I am going to put a true track or quaife in the front, with the extra push from the rear locker, it is supposed to pre-load the fronts nicely. For sand driving I think this set up will be close to perfect. But as described above when I lived in the UK I had my detroit in my old Camel Trophey 110 and on a slippery side slope the locker was bloody freightening, it is great most of the time, but when you have a big drop off beside you and the @rse end keeps breaking away and you see a standard open centre 110 in front of you tracking nice and straight you think for a minute or two, why did`nt I fit a manual locking diff.

If most of your driving is in sand or rocks go the detroits, but if you do a lot of driving in slippery conditions, like the mountainous roads etc in the snow, steer clear of them. The true tracks might not be as bad as the locker, but do be aware of the problem.

Hi all ,

Justinc do report on how your D1 performing with tru trac front and rear .

I have read that on long sweeping corner, the vehicle tend to jump out of line . What is your experience on this ?
Anyway I think that the set up is great for a touring vehicle .

Ta

Originally Posted by cols110

I`ve got a detroit locker in the back of my 110, for the driving I am doing now which is mainly sand it is perfect, as it really is fit and forget, all you have to do is worry about driving it. I think I am going to put a true track or quaife in the front, with the extra push from the rear locker, it is supposed to pre-load the fronts nicely. For sand driving I think this set up will be close to perfect. But as described above when I lived in the UK I had my detroit in my old Camel Trophey 110 and on a slippery side slope the locker was bloody freightening, it is great most of the time, but when you have a big drop off beside you and the @rse end keeps breaking away and you see a standard open centre 110 in front of you tracking nice and straight you think for a minute or two, why did`nt I fit a manual locking diff.

If most of your driving is in sand or rocks go the detroits, but if you do a lot of driving in slippery conditions, like the mountainous roads etc in the snow, steer clear of them. The true tracks might not be as bad as the locker, but do be aware of the problem.

I have had No-spins (Detroit Lockers) in trucks (Rockwell SSHD's with three way No-spins), fast cars ( 1970 Dodge Hemi 426 Challenger, 1969 HT GTS350 with 370 hp at the wheels). They work. I would love to try an LR with a No-spin in the front and fiddle brakes in the back. Don't know what would happen with the various arrangements of centre diff/ power divider. Could be fun. What about three way No-spins in an LR?