The rear LSD (or e-locker) is an appreciable upgrade, and is easy to install. It is very effective when all 4 wheels have equal grip. But when you exeed the maximum efficiency of the center diff LSD; the rear LSD/locker becomes of no utility. A good exemple is if your RAV4 has an airborne front wheel: all the power will go to this wheel until you find a way to stop it spinning free... or use momentum while passing this obstacle. Another exemple is if you climb a steep hill in soft sand. Most of the weight will be on the back, and you will have so much grip at the rear wheels that the front wheels will become easier to spin with their loss of traction... then the center diff wiil be exeeded... then more power will be sent to the front wheels because they have less traction. This is where the center diff locker bright; because it cancels the center diff. You now have the assurance that both front and rear diffs always receive the same amount of power!Would you still go for a rear diff e-locker before modifying the center diff? Will it make any difference on sand/mud?
Now that the rear differential is locked, I tried flexing the suspension up in the air and lifted the front passenger and rear driver tires. It seems the viscous coupling is probably worn as the rear tires are not receiving as much power as I had hoped. Definitely seems to be a worn out center differential.
I am now considering the path that you went with the E250F transmission so that I can manually lock the center differential.
I'm curious about this too, my singular test drive with the LSD was up a sandy hill. My base test with the open differential had near equal spin from front to back. With the LSD it was mostly front. Now one would expect the open transaxle to spin more, but, it was spinning MUCH more leaving me to wonder why that power wasn't being sent to the rear?
I always wonder if jabbing the brake pedal when the front wheel is airborne and the only one spinning, it will activate ABS, and sent power to the rears for a few seconds at the very least, enough to pull you out of this issue.The rear LSD (or e-locker) is an appreciable upgrade, and is easy to install. It is very effective when all 4 wheels have equal grip. But when you exeed the maximum efficiency of the center diff LSD; the rear LSD/locker becomes of no utility. A good exemple is if your RAV4 has an airborne front wheel: all the power will go to this wheel until you find a way to stop it spinning free... or use momentum while passing this obstacle....
If you take a look at RAV4Explore's build; he installed an e-locker in the rear diff. At the pages 2 and 3, him and 05RAV describes exactly what I just explained here.
You are an amazing source of information, i have an ACA30 that has the 1AZ-FE engine, with a E325F transmsion i think, i was looking to first, known more about that transmision and ratios, and if an LSD diff can be installed on the rear, also, there is a company that made locking diff for XA30+ models... it cost like 1kusd...I would need some rollers like this to show how my upgrades works haha!
Yes that's the locker I'm talking about, I'm at the shop installing the h&R Springs and will ask then about itThis is the e-locker you're talking about. There is a member here that have one on his RAV4.2.
The E-Locker’s electromagnetic locking mechanism is the next generation of aftermarket differential technology. Performs as an open differential until you decide that you need more traction. AER ELocker is your push button solution to almost any traction problem. Designed expressly for 4-wheel...auto-equation.com