2010 tacoma 4x4 SR5 Auto LSD??

Wats the point of this. I don't have the trd package but I do have the Auto LSD and TRAC controll. I have read many post but cant figure out why Auto LSD doesn't work in 4HI. So in 2wd, press the TRAC off button and that engages Auto LSD but only in 2wd. I read the manual and it doesn't help. So whats the deal? Do i use the TRAC on Pavement or do I use Auto LSD??

 

Just keep trac on, I'm pretty sure the LSD will still cut in if you have wheel spin. In 4hi you cant use the LSD but you have trac, which pretty much the same, it just requires you to reach a certain rpm with slippage before it engages.

 

It is not apparent when reading the owners manual but I can clarify the difference.

While in 2WD the difference between Auto-LSD and TRAC is that when wheel spin occurs while TRAC is active, it can regulate/reduce throttle and arrest the spinning wheel which will transfer torque to the opposite wheel on the same axle.

When wheel spin occurs occurs while Auto-LSD is active, throttle is NOT regulated, and it will arrest the spinning wheel and send torque to the opposite wheel on the same axle.

Now here is the subtle twist that most people don't get. If your truck is in 4WD, TRAC will not regulate throttle when wheel slip occurs.

Therefore you can say that while in 4WD and TRAC is active, it is similar but not as powerful as Auto-LSD on both front and rear axles simultaneously.

Also, we have discussed this subject ad infinitum in other threads, some of which are very good discussions.

Here is a link to a good thread about Auto-LSD. The last three pages has some good meat in it. Read it carefully if you're hungry for more information.

http://www.tacomaworld.com/forum/technical-chat/60011-auto-lsd-what-point-4.html#post1557004

All the best,

Crom

 

^ much better job explaining than I did! I remember those threads, a bit overwhelming at first.

 

Spend some time doing a search on this and you will read pages! I came to Tacoma World to learn what the various drive modes did... plus using them off road helped a lot.

There is a difference with the AUTO LSD you have and the one I have with the OFF ROAD TRD 4WD TACOMA... Because of the hydraulic brake booster for the A-TRAC, our AUTO LSD and TRAC are stronger...

I would suggest you only turn on the AUTO LSD when you need 'posi-traction' in 2WD to move from a slippery location. You have LSD action with TRAC in 2WD, but like Crom said, the AUTO LSD doesn't regulate engine output and TRAC in 2WD does... so more power to the wheels. TRAC is for moving along (normal driving) and AUTO LSD is to start moving from a stop, if the wheels spin.

TRAC in 4WD High Range is stronger like AUTO LSD because there isn't any engine regulation. Now, to have TRAC in Low Range 4WD, see the Yellow Wire Mod. posts!

 

Get used to it :
the truck is smarter than you
and you are now it's servent - haha