Question about welded rear diff

[EUROTECH1986535]

I have a spare 3.7 diff i was thinking about having the spider gears welded together as a "lincoln locker". my question is if i do this can i remove them if i ever wanted to swap the spiders from my other axle in to have an open diff again. i know how to remove the spider gears but i never tried to remove the other set in there i never paid attention when i swaped the 4.10 chunk in. thanks and

 

[Kynot62]

Welding the spiders pretty much destroys the carrier for other use. I wouldn't bother. Aussie lockers are pretty cheap and can be installed without removing your 3rds if I remember correctly.

It's only minor but the 62 gears are 4.11's. 4.10's are an old Ford gear. Might want to fix your sig line...

Tony

 

[Cruiserdrew]

It's only minor but the 62 gears are 4.11's. 4.10's are an old Ford gear. Might want to fix your sig line...

Tony

37 x 9 = 4.11= traditional Land Cruiser gearing.

41 x 10 = 4.10 = all 80 series Land Cruisers. And you can use 80 series (rear) 4.10s in older diffs no problem.


60 series are 37 x 10 = 3.70.

 

[EUROTECH1986535]

Welding the spiders pretty much destroys the carrier for other use. I wouldn't bother. Aussie lockers are pretty cheap and can be installed without removing your 3rds if I remember correctly.

It's only minor but the 62 gears are 4.11's. 4.10's are an old Ford gear. Might want to fix your sig line...

Tony

1) a properly welded rear only welds the four spider gears together nothing is welded to the carrier as it is dissimilar metal and would not hold anyway.
2) my question is clearer this way, will the spider gears that the axle shafts go through rotate in the housing (for removal)with the cross pin out.
3) i do not care for automatic lockers. i dont like that they engage/disengage in sudden manuvers. with a welded rear you know what it will do and are never caught off guard when it does it.
4) i have a welder and can weld it myself so this locker is just $8 (gear oil) for me now thats bang for the buck.
5) a welded rear aint for everyones driving style but it suits what i do fine, (i have owned several welded diff vehicles in the past). i wish i could ARB it but that aint in the budget right now. i know all the pros and cons and 10 people will have 10 diff opinions i just need to know if physically possible.

 

[EUROTECH1986535]

37 x 9 = 4.11= traditional Land Cruiser gearing.

41 x 10 = 4.10 = all 80 series Land Cruisers. And you can use 80 series (rear) 4.10s in older diffs no problem.


60 series are 37 x 10 = 3.70.

i pulled both diffs and axles from a 62 in my local you pull they had both been rebuilt @ one point and have 41-10 ring and pinion they are both 9.5 ring gear so i thought they were stock 62 axles as the 80's have a 8" front ring gear

 

[Kynot62]

Never knew Toyota used 4.10's in anything, just proves I keep learning new things all the time.

Pulled out an open carrier I have in my shop from my 62 and once you welded it, I don't believe the spiders with attached side gears could be removed. Looks like everything has to come apart to get all the pieces out.

When assembled it looks like the spiders and the side gears are wider than the opening in the carrier.
But I have been wrong before...

I do remember an article a while back in Toyota Trails about what was called a mini spool. I think it converted an open carrier to a locker and was reversible. But I can't remember the issue date, maybe someone else does?

Tony

 

[BC40]

I have a spare 3.7 diff i was thinking about having the spider gears welded together as a "lincoln locker". my question is if i do this can i remove them if i ever wanted to swap the spiders from my other axle in to have an open diff again. ....

You can if you do it like this:

4x4 news, information and e-mail list Victoria, B.C.

Google 'fozzy locker'.

 

[EUROTECH1986535]

bc that is exactly what i needed i am going to be fozzy locked by next weekend.at least in the rear might go with a aussie locker up front.

 

[orangefj45]

1) a properly welded rear only welds the four spider gears together :

NOT TRUE!!!!!!!!

"properly" welded diffs can be removed an installed just like their open counterparts. you do not need to pull the carrier.........and the gears do NOT get welded together.

georg

 

[lehiguy]

NOT TRUE!!!!!!!!

"properly" welded diffs can be removed an installed just like their open counterparts. you do not need to pull the carrier.........and the gears do NOT get welded together.

georg

I was going to say the same. I have only heard of successful Lincoln Lockers being accomplished by welding the side gears to the carrier. At that point, the spider gears and shaft only serve to keep the axles from falling out.

 

[elripster]

I was going to say the same. I have only heard of successful Lincoln Lockers being accomplished by welding the side gears to the carrier. At that point, the spider gears and shaft only serve to keep the axles from falling out.

My experience was just the opposite. Welding the side gears to the carrier cracked and broke loose just pulling out of the garage. It's possible the welder did something wrong but I did have a professional do it. (it was back in the late 90's so I don't remember who). Welding the gears together made for many trails thereafter. I did that secibd attempt myself with my flux core and that set up took loads of abuse without issue.

Frank

 

[ntsqd]

My vote is to spend the money on a real locker or spool or LSD or whatever it is that you want. Welded diffs are very, very shade tree.

That said, the longest lived welded diff that I know of isn't welded to anything. They just filled in the grooves between the teeth of the side gears so that the spider gears can't rotate thru.

 

[EUROTECH1986535]

My vote is to spend the money on a real locker or spool or LSD or whatever it is that you want. Welded diffs are very, very shade tree.

i agree but for the $8 in gear oil and 20 minutes it cost me i wouldnt be able to buy much of a locker. besides it gives me posi till i can afford that pair of ARB'S i have been eyeballing. it was also done with a spare set of spiders so if i dont like it i will go back to open diffs i am just trying to prepare for rainy season, when the ranch i maintain turns to pudding(old cypress swamp) as i stated in my op i dont like auto lockers because of there unpredictability which sucks cause lock rights are cheap

NOT TRUE!!!!!!!!
"properly" welded diffs can be removed an installed just like their open counterparts. you do not need to pull the carrier.........and the gears do NOT get welded together.
georg

as i just learned. i love this site! you were refering to the "fozzy lockers right"?

 

[TobyB]

Interesting. My experience with welded diffs has been that welding the spiders together is
the only thing that really works... the carrier was something you wanted to keep cool and
out of the welding process. But that's on a different (bmw) diff...

t

 

[Heckraiser]

Never knew Toyota used 4.10's in anything, just proves I keep learning new things all the time.

4.10 are standard mini-truck/4runner fare as well

 

[orangefj45]

I was going to say the same. I have only heard of successful Lincoln Lockers being accomplished by welding the side gears to the carrier. At that point, the spider gears and shaft only serve to keep the axles from falling out.

not true either.

if you were to do so, then you'e be welding two different ferrous metals together and that's not easily done right. besides, you have no way to properly pre-heat them or control the cool-down process.

the "proper" way to weld a diff is to not weld anything together at all. removethe spiders and side gears. pre-heat them and then weld in the gapswo consecutive gears. do so on the opposite side of the gear as well. on the spiders, you need two welded teeth next to tow non-welded teeth. on theside gears you need basically the same thing. once they're welded they need to be placed in a bucket of sandor firmly wrapped in a welding blanket so they cool down slowly. if this is not done then they'll crack........

welding the gears this way allows fr them to be installed and removed like a stock set of gears. you also won't contaminate anything with welding spatter. the gears still have a little "play" to ramp onto each other.

greenfox on here has a set of these in his 40. they've been in there since 2005............and he beats the snot out of the rig. it's also got quite a few road miles on it.

hth

georg @ valley hybrids

 

[EUROTECH1986535]

update just got gears back from my buddy all ready to install for the weekend i will kep yall posted

 

[90FJ]

update just got gears back from my buddy all ready to install for the weekend i will kep yall posted

Bump.

Anyone else ever seen or welded spiders this way?

Thanks.

 

[orangefj45]

Absolutely. We've been welding them this way for years.

Bottom line: it works.

Georg @ Valley Hybrids

 

[90FJ]

Thanks George!

Heat, weld, wrap and cool slowly. Any other tips, gonna do this tomorrow.