Limted Slip Differentials with Traction Control vs. E Lockers

the kid said:
idk, but i know for a fact that you do not have 3.90 gears, and i have never seen your runner or met you... toyota never made a 3.90 geared 7.5 clamshell front diff, and you can not get 3.90 gears for one. the lowest (numerically)-tallest geared you can go in the front diff is 4.10.... and some runners and tacomas came with 4.10 elockers, but most were 4.30, but not all.
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I found a source for axle codes
http://www.sonoransteel.com/include...eel/TechArticles/1996-2004ToyotaGearRatio.pdf
My code is vzn185l gkpgka
It says 4.10 with 265 tires
And 3.909 without.
My truck came without 265 tires
That is how I got the 3.90
 
took this excerpt from east coast gear supply

Tacoma 7.5 Reverse Clamshell 3rd Member Assembly




Tacoma 7.5 Reverse IFS Clamshell

SKU: DIFF-BUILD-T7.5CS
Brand new Nitro Gears, 4.56/4.88/5.29 Ring and Pinions
Stock ratio 3.55, 3.90, 4.10, 4.30 also available.
All new Timken, or Koyo bearings
Lockers or positraction units can be added in drop down tabs below
This is an assembled Front 7.5 reverse Tacoma or Tundra clamshell differential and includes shipping but does not include return shipping or core charge.

Tacoma 7.5 Reverse Clamshell 3rd Member Assembly

i dont know if east coast gear supply is wrong or right i just remember reading it.
 
Interesting because Toyota only lists a 3.55 and a 3.90 for 2wd applications, and they don't have 3.90s for a clam. And I have never before seen a company offering anything higher than a 4.10 for the clam shell....

Welp apparently I was wrong, sorry to the op, -glad you have the correct information now and it was confirmed. This is one of those deals where Toyota just kinda did a "what ever..." With their stuff. -some non highlanders have the 99 tall coils, some 4runners are pre wired for the rear locker, but don't have the locker....
 
the kid said:
again you DO NOT have 3.90 gears, i still dont know why you think you have them, as no 4wd 4runners ever came with 3.90 gears, only 2wd runners had those gears. if you do an ARB or trutrac you wont have to regear at all...
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Just wondering. I have a v6 4wd and the dealership told me I had 3.909 gears. Please enlighten me as to what gears I have in my 2003 4runner sr5
 
Why no locker in the front?

Bill C. from Ausie Lockers:

Quote:
Thank you for your note. The front locker is not engaged but one side is turning, so you may hear the click in a turn. The locker is designed for this and you do not experience premature locker wear as a result.
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tyr0981 said:
Why no locker in the front?

Bill C. from Ausie Lockers:

Quote:
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A selectable locker in the front is the best way to go. There are 2 reason I wouldn't put a full time locker in the front. 1) The locker is engaged anytime 4WD is engaged. I would be more likely to break CV axles since I can't control when it is and is not engaged. 2) Snow. Deep snow wheeling works well with lockers front and rear. But, if it's not a foot or more of snow then a locker in the front makes it difficult to steer.
 
2big4arunner said:
Just wondering. I have a v6 4wd and the dealership told me I had 3.909 gears. Please enlighten me as to what gears I have in my 2003 4runner sr5
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you might wanta go ask the guys over in the 4th gen section too.... i dont know 4th gens as well as i do 3rds(and apparently i dont know as much as i thought about 3rds either)
 
Kurtis said:
A selectable locker in the front is the best way to go. There are 2 reason I wouldn't put a full time locker in the front. 1) The locker is engaged anytime 4WD is engaged. I would be more likely to break CV axles since I can't control when it is and is not engaged. 2) Snow. Deep snow wheeling works well with lockers front and rear. But, if it's not a foot or more of snow then a locker in the front makes it difficult to steer.
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It's my understanding it only locks under decent throttle (the Aussie locker), so if you've got the steering wheel cranked over and not flooring it, it won't be locked?
 
steezemcqueen said:
4WD 4Runners did come with 3.90's. My parts truck is a 96 V6 4wd 5 speed with 3.90 gears. Came with 225/75/15 tires.
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Thanks for all the responses. My 4x4 came with the 3.90. I moved to a p rated 265/70/17 and my rpms are at about 1900-1950 at a gps confirmed 65 mph. I think that is the most tire you could put on it though. Even a e rated 265 would make it a dog.

I have gotten 23 mpg on a highway doing 65. My city driving suffers though about 16 mpg. How much better would my city fuel mileage be if I geared down? Would that bring up my average?
gu5u9u2a.jpg
 
tyr0981 said:
It's my understanding it only locks under decent throttle (the Aussie locker), so if you've got the steering wheel cranked over and not flooring it, it won't be locked?
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For the Aussie Locker or what is called a "Lunch Box Locker," are an aggressive locking and unlocking action. When folks put a Lunch Box Locker in the rear of their rigs they have to relearn how to drive it because of the locking and unlocking action. Because of the harsh action of these Lunch Box Locker I would not put it in an IFS rig. I do not have experience with these lockers in IFS but I do with solid axles.

Another down side to these lockers is the strength is dependent upon the carrier in the differential. Being the front is a 7.5" I'd be hesitant to put too much strain on it.

A lot of people put these in their rigs and it works for them. I just don't recommend using them in an IFS rig.
 
Well I guess it is time for me to put some input here has I have an 01 with a "lunchbox" locker. Btw I DD my rig. Lots of freeway and city driving. I don't take the Easy routes when offloading either.

As stated somewhere before that a Detroit Trutrac is a great locker but as well you have to employ "Power Braking" to keep power to the wheel that is off the ground. Not idea in some situations.

Lunchbox (Lockrite, Spartan, Aussie) operate on torque being applied. Because of the design they allow a wheel to spin freely for corners and such. Contrary to popular belief they like a little throttle around corners. I have roughly 1500 miles on those locker and had 45k on the Spartan in my Heep.

Now on to your TRAC question. I run the Andy Mod 2.0, while it is helpful with keeping the brakes from freaking out. Even the mod can be defeated. The places that I have experienced this are on STEEP climbs up loose roads. Not a place you want to have that kick in. I did run my rig with TRAC/ASC on for a while and honestly I didn't have the it kick in as much with the locker. When it locks up the computer doesn't see the wheels slipping as much so less engagement.

Everyone bashes on lunchbox locker and say that they are weak and not for serious off-roading but seriously the most that we run is a 33s with a select few on 35s. I have ran 31s and now 33s on these lockers and never had an issue with either. I have a buddy running 35s with 4.88s and a S/C. He broke the pins connecting the two halves and that was once in three years. He is not very "Nice" to his truck either lol the issues with lunchbox lockers comes when you run like say 36in+ tires. Prepare for failures on those sizes. Rotational mass and force woth those tires will destroy a lunchbox.

As for running one on the front: unless you are running a trail only rig, DON'T DO IT!!! Front lockers on the road, especially with IFS is a bad idea. Selectable only for the front. We have an ADD in our runners that lock and unlock the two front wheels. This is basically the same thing as running manual hub minus the fact that the front spider gears still spin. I have heard this called a locker and wow they are wrong. Lol audacity of some people cracks me up.

Traction control has its place. Some situations it is good to have and some other definitely not a good idea. You can't go wrong with a rear locker. The e locker is a great choice if you want a factory ride with no hiccups on the road. Mixing it with the TRAC/ASC system is not bad either. Another option to look at is ARB. Not a bad way to go especially if you going to regear anyway as it changes the carrier.

There you go for my .02 cents
 
smkd13 said:
Well I guess it is time for me to put some input here has I have an 01 with a "lunchbox" locker. Btw I DD my rig. Lots of freeway and city driving. I don't take the Easy routes when offloading either.

As stated somewhere before that a Detroit Trutrac is a great locker but as well you have to employ "Power Braking" to keep power to the wheel that is off the ground. Not idea in some situations.

Lunchbox (Lockrite, Spartan, Aussie) operate on torque being applied. Because of the design they allow a wheel to spin freely for corners and such. Contrary to popular belief they like a little throttle around corners. I have roughly 1500 miles on those locker and had 45k on the Spartan in my Heep.

Now on to your TRAC question. I run the Andy Mod 2.0, while it is helpful with keeping the brakes from freaking out. Even the mod can be defeated. The places that I have experienced this are on STEEP climbs up loose roads. Not a place you want to have that kick in. I did run my rig with TRAC/ASC on for a while and honestly I didn't have the it kick in as much with the locker. When it locks up the computer doesn't see the wheels slipping as much so less engagement.

Everyone bashes on lunchbox locker and say that they are weak and not for serious off-roading but seriously the most that we run is a 33s with a select few on 35s. I have ran 31s and now 33s on these lockers and never had an issue with either. I have a buddy running 35s with 4.88s and a S/C. He broke the pins connecting the two halves and that was once in three years. He is not very "Nice" to his truck either lol the issues with lunchbox lockers comes when you run like say 36in+ tires. Prepare for failures on those sizes. Rotational mass and force woth those tires will destroy a lunchbox.

As for running one on the front: unless you are running a trail only rig, DON'T DO IT!!! Front lockers on the road, especially with IFS is a bad idea. Selectable only for the front. We have an ADD in our runners that lock and unlock the two front wheels. This is basically the same thing as running manual hub minus the fact that the front spider gears still spin. I have heard this called a locker and wow they are wrong. Lol audacity of some people cracks me up.

Traction control has its place. Some situations it is good to have and some other definitely not a good idea. You can't go wrong with a rear locker. The e locker is a great choice if you want a factory ride with no hiccups on the road. Mixing it with the TRAC/ASC system is not bad either. Another option to look at is ARB. Not a bad way to go especially if you going to regear anyway as it changes the carrier.

There you go for my .02 cents
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i see your experience, and raise you some more ignorance on my part....

what is the downside of having a "lunch box locker" on the front wheels on a IFS 4runner still spining the hub? it's disengaged (if working properly) from the other wheel & drive line, so aside from turning the weight of the gear (whichever your outside wheel is on a given corner) i don't see what it will hurt...???

someone connect the dots for me please.....

:pout:
 
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