295 views. What a joke. Trac Lok Differential Rear Axle. I have a newer Trac-lok in the rear of my current Jeep. The Truetrac will provide a near lock state when the power is applied, but it performs as an open differential until traction is needed. Put the TrueTrac in the front now and have the rear LSD repaired under warranty if it goes out. Thinking of bumping my rear gear ratio up from 3.70s to 4.11s (I have huge tires and a 700r4) in the Henry J. I would not use a Trac Loc now that there is the True Trac. 5 min read. Creager told us, “the Truetrac differential is the first in the marketplace to my knowledge that had parallel access pinion gears. I have the choice of a true-trac or a trac-loc. Editorial Staff. I'm getting closer to the 9" installation, but I"m not sure which diff to go with. The Truetrac doesn’t use the typical clutch or spring type of mechanicals to provide that near locking state. A TrueTrac is terrific in … The rear diff is a 1950s era 9" with re-drilled axles. I have a True Trac and I've had a Trac Loc's in the past. On road the tru-trac was seamless. Just an opinion. It did pull good when you got on it. When the warranty is up and the Limited Slip is now a Full Slip Differential, now is the time to do something in the rear. I have to decide on either an Easton posi or Detroit Truetrac differential (I am not interested in a Currie 9" as I spoke to them and they said they have given the ABS/Traction Control market to Moser) I've used them on the street and in drag racing. Trac-lok may as well be open in my opinion. Need your feedback - pros & cons I am in the process of ordering a Moser 12 bolt for a 95 Firebird. 168 Posts . The tru-trac was fine on road when driving on ice. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle. Discussion Starter • #1 • Jan 12, 2006. February 10, 2020. A Truetrac is $450-ish, so a Ford Trac-Lok's gotta be $150 to be worth running in my book. I believe the Ford Racing Trac-Lok is a 4 pinion and has carbon fibre clutches, I will have to try to verify. Add comment. I really liked the tru-trac in the front, alot. There's a bunch of different flavors of worm-gear torque-biasing diffs. The True Trac as no wear parts and works just a well, if not better than a Trac Loc. May as well be open. The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. An Eaton Truetrac for the Dana 44; and one being installed in a fifth-gen Camaro rear housing. Before that, Gleason produced a perpendicular pinion, helical gear limited-slip-device.” The true-trac is a Torsen style …