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Old 07-16-2003, 08:49 PM
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Welding spider gears??

I have a gm 10 bolt 8.2" rear end. Its under my 71 chevelle with mild mods. I plan on putting a 3.73 rear in it and while i am at it i wanted to fix the One Tire Fire problem. I heard i could weld the spider gears together since i dont have TOO much horsepower. I drive this everday and am looking for a very cheap alternative to getting the whole posi track kit. Thanks for any advice in advance, and take it easy, im just 15.....
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Old 07-16-2003, 08:54 PM
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Don't do it.
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Old 07-16-2003, 09:37 PM
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o ok thanks for the detailed answer but really would it hurt??
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Old 07-16-2003, 09:53 PM
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His answer may not be long..... It is however, short and sweet. Also very much the truth. A welded rear will break. When it does, it will take your new gear with it. By welding the spiders together, you are making a spool. The 8.2" isn't that strong to start with. When turning, one wheel will have to spin, or one will have to slide. If both wheels are on dry pavement, an extreme amount of pressure will be applied to the axles and carrier. The only ones that I would say "Yes weld it up" to are a Derby driver who runs in a mud pit, or a Bomber division drit track racer. In either case, the low traction would relieve most of the stress on the rear. That and in eather case, you are talking about building a car just as cheap as you can to race once, or at the most twice before it is wrecked to bits anyway. If your budget is tight, hit Ebay for a deal on a used posi unit. You will be money ahead in the end. Not to mention the greif saved from a broked axle leaving you at a high rate of speed. Dan
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Old 07-16-2003, 10:02 PM
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So your saying that it is in no ways helpfull? How long would you estimate it would last? I live on backroads and go about 50 to town and back everyday (About 15 miles). I dont have too many turns and if i did could slow down... So even if it is welded really well it would break??
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Old 07-16-2003, 10:15 PM
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Let's pretend it will last forever, try driving it on a wet road sometime, even while changing lanes let alone curves. It isn't hard to imagine why it would not be a good idea. If placing yourself in danger doesn't bother you, then try it and see how it goes.
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Old 07-16-2003, 10:18 PM
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so your saying it is dangerous?! Please explain how i am ignorent to this ....
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Old 07-16-2003, 10:18 PM
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Arrow

Every time you turn one wheel is going to want to turn faster than the other, the spiders allow that to happen. If they're welded(same as a spool) then when you turn something has to give, and it is going to be the weakest link. Sometimes the tire may chirp as you turn, in a spool the axle may snap (that's why you should run better axles with them). with welded spiders it will most likely be them, (it also causes the car to plow). When you welded them you affect the heat treating in the gears weakening them. Consider the fact that if it lets go there is a chance that you'll all of a sudden have power to one axle or the other causing the car to jerk in one direction or the other,causing a highly dangerous situation.DON"T DO IT.
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Old 07-16-2003, 10:44 PM
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Listen to them, there telling the truth, a friend of mine is living proof of it, he welded the spider gears in his cutlass 7.5 rear, new richmond gears, it lasted about 4 months and the carrier split in half, ruined the gears, then he got another carrier, welded it up, new 3.73`s again, this time it lasted 5 months and it broke 5 teeth off the pinion gear and 8 off the ring gear. the gear sets go for about $179 i believe, and that was 2 sets of gears ruined and money wasted.
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Old 07-16-2003, 10:47 PM
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Quote:
Originally posted by Meangreen
so your saying it is dangerous?! Please explain how i am ignorent to this ....
why dont you just buy a "mini" spool? they only cost like 30.00 and there is no welding required and as long as you dont carve the coners it will last as long as your axles hold up under the abuse of haveing both wheels hooked together...I wouldnt try to turn to sharp in the rain, it will push you straight into the ditch!!!...lol all that aside I say its much safer than welding...(proboly cheaper too)
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Old 07-16-2003, 10:55 PM
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where can i get this mini spool and is it hard to install?
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Old 07-16-2003, 11:19 PM
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Let's see hear, you have a car that you'll never drive fast, but you want to weld the spiders and put 3.73 gears in. For what purpose? Posi is fun if youre using the bays at the carwash for a slalom course (I still don't know why the car overheated on me). In other words, If all you ever do is drive the car to town and back, don't even worry about it.
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Old 07-17-2003, 12:35 AM
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summit has a cheapo mini-spool, and i have heard of only one of the spider welds breaking under hard acceleration and it causing the car to launch left or right and people ending up rolling their rides, it really just isnt worth it.
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Old 07-17-2003, 06:49 AM
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I welded the gears in a demo car and blew the spiders to pieces. hardened gears WILL crack and break. The only reason for posi is traction if your not at the track, dont do it.
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Old 07-17-2003, 07:28 AM
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Meangreen; You seemed determined to do it regardless of the advice you get. Quit quibbling about it - just do it and report back to the board how it works.
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