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Old 01-31-2020, 02:45 PM   #1 (permalink)
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Toyota front spool

I killed the lunchbox locker in the front axle on my straight axle Toyota. To save money I considered running a spool. My question is with running stock axles with trail gear outers and a spool with a 22re, 4.7 single case, 5.29 gearing and 36” tsl’s will I snap a shaft more easy then running a locker? I don’t see many ppl welding or spooling the front diff so they must be a reason
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Old 01-31-2020, 04:35 PM   #2 (permalink)
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biggest reason is that at least with a lunchbox it is easier to turn at times. spool is much more prone to understeer/push through turns.

what lunchbox did you kill? they are cheap, easy and tend to work well

but yes, up front you are always more prone to killing a shaft vs a diff/locker
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Old 01-31-2020, 10:28 PM   #3 (permalink)
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I’m not sure what locker it is. Previous owner installed it
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Old 01-31-2020, 10:29 PM   #4 (permalink)
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Considering a spartan also. There pretty cheap
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Old 01-31-2020, 11:45 PM   #5 (permalink)
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Spool up front, imo, is pretty rad. Turning sucks but hydro assist. Definitely recommend rcvs. All lunchbox lockers are a joke. Go spool or Selectable.
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Old 01-31-2020, 11:48 PM   #6 (permalink)
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I've been told that Toyota spools like to bend. I think it was provience that I remember seeing a Pic of for sure.

Personally, I'd run a spartan.
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Old 02-01-2020, 12:04 AM   #7 (permalink)
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I've been told that Toyota spools like to bend. I think it was provience that I remember seeing a Pic of for sure.

Personally, I'd run a spartan.
yeah I fucked one up and got about .012" of bend/runout on my spool, but it took several years to get there (well, really it took high traction Utah and slamming the rear end a couple more times than I should have) and it was the cheapest spool available at the time made with indian steel.

after that and talking to people, apparently others have had some issues, but i'd still say it is generally uncommon. though, stock carriers certainly have more meat (strength) to them, you just need to be able to get it locked up solid enough that the side gears or welds don't become an issue.
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Old 02-01-2020, 12:44 AM   #8 (permalink)
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Iím in this group also. Broke 3 r&p in 3 trips on spools 1 front and 2 rears. All on small inclines with wet slippery ground. Welded stock carriers where much better. I beat them way harder and they lasted 2 seasons until I upgraded to selectable lockers. They are way too thin like built to be light weight like for a drag car and let everything stretch and defect. Stock carrier is much more robust.
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Old 02-01-2020, 09:08 AM   #9 (permalink)
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I’m not opposed to welding. The rear has been welded for years with no issues so far but I don’t have the spider gears for the front. I flirted with the idea of trying to weld up the locker but the better part of me says it will never hold and I would prefer not to take it back apart anytime soon.
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Old 02-01-2020, 09:35 AM   #10 (permalink)
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Iím not opposed to welding. The rear has been welded for years with no issues so far but I donít have the spider gears for the front. I flirted with the idea of trying to weld up the locker but the better part of me says it will never hold and I would prefer not to take it back apart anytime soon.
I've heard of guys welding lunch box lockers with good luck. They already don't want to slip, so I would think the welds wouldn't have as much stress as a welded open carrier.
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Old 02-01-2020, 12:00 PM   #11 (permalink)
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Yes I could see that being true the part I was worried about was were the pin goes inside the locker. I can’t see a way to get to it to put a good weld on it. The pin is a good 3” inside the carrier. I have a ton of slop where the pin goes into the locker. I think that what’s making it pop like crazy. The small pins in side the locker have a lot of wear marks also. I haven’t took the carrier part to see what is going on. When it was together with the hubs locked in I could turn the drive shaft almost 1/2 of a complete turn before the cross pin would make contact with the locker. It made an awful noise with that much slack in the drive shaft. I ran it like that for years until I had to pull my buddies zj up a steep rocky hill and I had to beat on it pretty good. After that the locker pops in and out all the time.

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Old 02-01-2020, 06:52 PM   #12 (permalink)
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You will snap a front just the same running g a front locker as running a spool or welded. Welded and spool are exactly the same. Locked is exactly the same as the other 2 when on the throttle. You have the same risk no matter which you run.
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Old 02-01-2020, 07:09 PM   #13 (permalink)
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I blew up an Aussie locker after 3 years of very rough driving. I invested in a Detroit locker, that was seven years ago. I have the same basic setup you do, except I have been running 37s, duel cases, with a spool in the rear.
I do my diff maintenance every season, I even blew up my 5.29s, but the locker wasn't damaged. You get what you pay for when it comes to quality axle equipment.
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Old 02-02-2020, 12:43 PM   #14 (permalink)
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I blew up an Aussie locker after 3 years of very rough driving. I invested in a Detroit locker, that was seven years ago. I have the same basic setup you do, except I have been running 37s, duel cases, with a spool in the rear.
I do my diff maintenance every season, I even blew up my 5.29s, but the locker wasn't damaged. You get what you pay for when it comes to quality axle equipment.
What Is diff maintenance? Draining the oil and looking for confetti? Iíve been on the same rear third for 11 years. Itís been in the rig for about 15. Iím sure the automatic trans helps. Itís had an arb and 37s the whole time.
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Old 02-02-2020, 01:58 PM   #15 (permalink)
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Welded stock carriers where much better. I beat them way harder and they lasted 2 seasons until I upgraded to selectable lockers. They are way too thin like built to be light weight like for a drag car and let everything stretch and defect. Stock carrier is much more robust.
every time i see a pic of a spool my very first thought is carrier deflection

i especially find it hilarious when it comes to 14b spools, mini spool FTW
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Old 02-02-2020, 02:22 PM   #16 (permalink)
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I definitely bent an old 4cyl spool.
I didn't check runout on the second one.
Never any issues with v6 stuff.
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Old 02-02-2020, 07:11 PM   #17 (permalink)
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I broke a locked front hi pinion from rompin on it in reverse in big rocks. That was the only time Ive broke a diff. It was so my buddy could take a pic

From what Iíve seen, if you have a arb or similar style carrier it shouldnít break with in reason. If you are breaking, you are subjecting it to shock loads beyond what it can handle and itís time to upgrade.
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Old 02-02-2020, 09:16 PM   #18 (permalink)
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V6 diff with a Spartan locker is the best bang for your buck.

Even in a high pinion 3rd, swap a v6 carrier with a Spartan.


I've installed and ran every Toyota diff made and that's what I recommend for a front diff.


Bent toyota spools are a real thing. I prefer a welded diff.

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Old 02-02-2020, 10:59 PM   #19 (permalink)
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I ordered a spartan today. It’s the 4cyl though. I don’t tend to beat on my stuff to often so maybe it will last for some time. I seen prices from $250 - -$450 for the same part number. What is up with that?
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Old 02-02-2020, 11:05 PM   #20 (permalink)
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Old 02-02-2020, 11:23 PM   #21 (permalink)
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V6 diff with a Spartan locker is the best bang for your buck.

Even in a high pinion 3rd, swap a v6 carrier with a Spartan.


I've installed and ran every Toyota diff made and that's what I recommend for a front diff.


Bent toyota spools are a real thing. I prefer a welded diff.

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No, spartan in a V6 diff sucks, it keeps the factory side gears, which are weak as fuck and will break, which strips the end of your axle splines.
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Old 02-03-2020, 07:50 AM   #22 (permalink)
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No, spartan in a V6 diff sucks, it keeps the factory side gears, which are weak as fuck and will break, which strips the end of your axle splines.
This right here. I killed a V6 lunchbox in a hi pinion front in short order. The 4 cylinder models are actually stronger than the V6. The side gears don’t break, the teeth get rounded off making it useless. I actually have pictures of mine on here from 2006? I ended up replacing it with the rear Detroit and putting an elocker 3rd in the rear axle.

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Old 02-03-2020, 08:22 AM   #23 (permalink)
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Dang, I guess part of it depends on the condition of the v6 carrier. I was skeptical of reusing the factory side gears at first too, but a plethora of 3rd gen 4runners in the pull-a-part kept a good supply of $50 complete 3rd members to mix and match parts from. Broke a few axle shafts (rear and 30 spline Longs) with this setup.

Basically every 4cyl lunchbox locker Iíve put in came back with a busted center pin at some point (sometimes after breaking an axle shaft or 2)

YMMV




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Old 02-03-2020, 09:45 AM   #24 (permalink)
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Old 02-08-2020, 10:26 AM   #25 (permalink)
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I've been told that Toyota spools like to bend.
They deflect bigtime.
Thin machined web and holes too boot.
Load bolt's work and I am surprised more people don't do this mod themselves.

Lincoln locker best bet...
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