Results 1 to 7 of 7

Thread: When to lock the rear axle?

  1. #1
    Starting Member
    Join Date
    Oct 2013
    Posts
    5

    Question When to lock the rear axle?

    Hi there! Thanks in advance for your input.

    My friend has a 2005 Tacoma 4x4 with locking rear differential. He asked me this question recently and I wasn't sure how to best answer it.

    First, this truck would only be doing relatively easy off-roading. It only has street/4x4 tires and there would be no rock climbing or anything like that.

    So, his question was this: Should I lock up the rear diff's as soon as going off road, before hitting an obstacle, or after getting stuck?

    p.s. It would be desert off roading in the Phoenix area.

    Thanks again!

  2. #2
    quasi-modo crawler#976's Avatar
    Join Date
    Dec 2004
    Location
    Chino Valley, AZ.
    Posts
    2,154

    Default

    That's a good question. I can make suggestions, but only seat time reading terrain can dictate when a locker is needed. Your driving skill goes a lot further than a locker will in most cases.

    I'd say that 90% of the time you should lock it before you think you need it. Stuff like coming across a long section of two track that is heavily rutted and full of water is an example. Scout it first, and if it appears to be doable, go to low range, lock the axle and have a plan if you don't make it. Once stuck, it's unlikely a locker will get you out. It won't hurt anything on dirt to have it locked, but if it's not needed, don't use it.

    The '05 Tacoma is like most vehicles these days in that the locker is only available in low range. There is a modification to the system that will allow you to use the locker in hi range too. It involves adding relays and switches to the wiring that controls the locker switch. There are detailed posts on how to do that on the TTORA forum. A rear locker in high range is very usable in sand.

    First off, are the tires upgraded to an LT all terrain or mud tire? If not, that's the first thing that really, really needs to change. A P rated tire is, IMO, not even worthy of needing a locker. P rated stock tires are so thin in the sidewall, if you get into stuff that requires a locker, you're probably going to have other problems. With a stock '05 Tacoma (we owned a mildly modified '05 DC/TRD for many years by the way) on a good tire like a Toyo AT 2, Falken Wild Peak, Cooper AT, Toyo M/T, or GoodYear MT/R Kevilar that will not cut a sidewall very easily, you can get into stuff that may require a locker. Good tires also allow you to air down to get better traction, and a softer LT tire is less prone to damage than a P rated - P rated will cut if you look at'm funny. Having a good compressor is a requirement - the MV50 sold at O'Rielly's is a good example of a quality compressor that doesn't break the bank.

    More often than not, I use mine in snow and sand. I'll lock up before venturing into deep snow or super soft sand. They also come in quite handy on some of the more technical trails I do. http://youtu.be/7xy6RI4Pqfc

    Mud is a rarity, but we do find it every now and then, and a locker works well in that too.

    There are exceptions to locking up an axle. On off camber situations, a locker can cause you to move sideways as much as forward. Again, it all comes down to experience reading terrain.

    You should always go with at least one other vehicle unless you are very well prepared like we are. A winch and all it's associated gear, complete recovery gear selection including chains, shovel, hi lift jack, a real jack, a good spare.

    Have fun, and Tread Lightly

    Mark


  3. #3
    quasi-modo crawler#976's Avatar
    Join Date
    Dec 2004
    Location
    Chino Valley, AZ.
    Posts
    2,154

    Default

    If you'd like to join us, we will doing a group trip on the 9th of Nov. It's posted in the trips section, and will give the opportunity to see a nice group of vehicles, some stock, some not so stock, and to meet some very knowledgeable folks.


  4. #4
    Peripatetic Member flywgn's Avatar
    Join Date
    Feb 2006
    Location
    Snake River Plain, 360 posts as 'bufeo'(joined 2/04)
    Posts
    422

    Default

    Quote Originally Posted by crawler#976 View Post
    That's a good question. I can make suggestions, but only seat time reading terrain can dictate when a locker is needed. Your driving skill goes a lot further than a locker will in most cases. ...Have fun, and Tread Lightly

    Mark
    Mark makes some excellent suggestions here.

    Allen R.
    "I've beaten the odds. I can afford to take chances." —Theodore Roosevelt
    "No one shall speak to the Man at the Helm." —Lewis Carroll

  5. #5
    Only one life to live, Explorer 1's Avatar
    Join Date
    Feb 2007
    Location
    Whittier, Ca
    Posts
    509

    Default

    Quote Originally Posted by crawler#976 View Post
    That's a good question. I can make suggestions, but only seat time reading terrain can dictate when a locker is needed. Your driving skill goes a lot further than a locker will in most cases.

    I'd say that 90% of the time you should lock it before you think you need it. Stuff like coming across a long section of two track that is heavily rutted and full of water is an example. Scout it first, and if it appears to be doable, go to low range, lock the axle and have a plan if you don't make it. Once stuck, it's unlikely a locker will get you out. It won't hurt anything on dirt to have it locked, but if it's not needed, don't use it.

    The '05 Tacoma is like most vehicles these days in that the locker is only available in low range. There is a modification to the system that will allow you to use the locker in hi range too. It involves adding relays and switches to the wiring that controls the locker switch. There are detailed posts on how to do that on the TTORA forum. A rear locker in high range is very usable in sand.

    First off, are the tires upgraded to an LT all terrain or mud tire? If not, that's the first thing that really, really needs to change. A P rated tire is, IMO, not even worthy of needing a locker. P rated stock tires are so thin in the sidewall, if you get into stuff that requires a locker, you're probably going to have other problems. With a stock '05 Tacoma (we owned a mildly modified '05 DC/TRD for many years by the way) on a good tire like a Toyo AT 2, Falken Wild Peak, Cooper AT, Toyo M/T, or GoodYear MT/R Kevilar that will not cut a sidewall very easily, you can get into stuff that may require a locker. Good tires also allow you to air down to get better traction, and a softer LT tire is less prone to damage than a P rated - P rated will cut if you look at'm funny. Having a good compressor is a requirement - the MV50 sold at O'Rielly's is a good example of a quality compressor that doesn't break the bank.

    More often than not, I use mine in snow and sand. I'll lock up before venturing into deep snow or super soft sand. They also come in quite handy on some of the more technical trails I do. http://youtu.be/7xy6RI4Pqfc

    Mud is a rarity, but we do find it every now and then, and a locker works well in that too.

    There are exceptions to locking up an axle. On off camber situations, a locker can cause you to move sideways as much as forward. Again, it all comes down to experience reading terrain.

    You should always go with at least one other vehicle unless you are very well prepared like we are. A winch and all it's associated gear, complete recovery gear selection including chains, shovel, hi lift jack, a real jack, a good spare.

    Have fun, and Tread Lightly

    Mark

    Great video of a full size beast CRAWLING through a garden of rocks!

    I agree with what you said but would add that a little bit of tire spin and I mean a very little isn't necessary a indication that you need to engage your lockers. Years ago I found that I was getting a little sloppy with choosing my line because I could always just throw on the lockers and have them off set my choice of a poor line. So on a trip my son-in-law and I decided to travel the day without our lockers unless me made multiply unsuccessful attempts. It was an eye open as to just how sloppy we had become on choosing a line.

    As illustrated in these two video's first with lockers and then without:

    https://www.youtube.com/watch?v=zW_WstxuTMo

    https://www.youtube.com/watch?v=NYsU18J5gmg

    Practice, practice and then practice more and in most cases you can get by with very little use of a locker.

    Thanks,
    Fred
    Explorer 1
    Last edited by Explorer 1; 09-30-2014 at 12:43PM.
    1990 Jeep Cherokee a constant work in progress.............

  6. #6
    Dude! Check out that View Scenic WonderRunner's Avatar
    Join Date
    Jun 2005
    Posts
    809

    Default

    My thoughts on lockers have changed a bit now that I finally have one. I finally installed a Toyota FJ TRD Electric Locking third member in my 1988 Toyota 4Runner in 2011. Yes it fits with a couple of simple mods. Now when I hit the dirt, instead of getting out and flipping my hubs and putting it in 4WD right away, I simply hit my Locker button on my dash. I find that with just my rear locked I can make it over most terrain. If anything becomes difficult, I can simply put it in 4WD. If my hubs are already flipped, I don't even need to go outside. Best Mod I ever did to my 4Runner! Nothing stops me now!
    1988 Toyota 4Runner SR5 4x4 V6 Auto
    4 wheels are taking me farther than 18 ever could!

    .......still Praying for Toyota diesel!

    Treat others on the trail.....like you would want to be treated!..........

    "Hey, life aint always beautiful, but its a beautiful ride."

    "Here's to wonder and runnin'....in the San Juan Mtns. of Colorado!" ~"SWR"

  7. #7
    Dude! Check out that View Scenic WonderRunner's Avatar
    Join Date
    Jun 2005
    Posts
    809

    Default

    I found my locker retrofit story over at Yotatech. Thought I would share it with you. Best mod I have ever done.

    http://www.yotatech.com/f31/toyota-e...inally-243769/
    1988 Toyota 4Runner SR5 4x4 V6 Auto
    4 wheels are taking me farther than 18 ever could!

    .......still Praying for Toyota diesel!

    Treat others on the trail.....like you would want to be treated!..........

    "Hey, life aint always beautiful, but its a beautiful ride."

    "Here's to wonder and runnin'....in the San Juan Mtns. of Colorado!" ~"SWR"

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •