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Author Topic:   Rear end welds keep breaking......mini spool???
bm4183
Dirt Full Roller

Total posts: 39
posted July 26, 2004 06:38 PM  
My welded spiders broke for the second time this year. I know it's cheaper to weld the spider gears, but I don't know if I should have it done again. Can anyone give me some insight on spools? Which is better, full spool or a mini spool? How hard are they to install?

Pickel
Dirt Forum Champ
Total posts: 784
posted July 26, 2004 07:23 PM  
It's for a gm 7.5. I know welding them is the cheapest, but like I said they have broke twice already this year in only 7 nights.

I wish I could find someone who can weld them right and save the money, but....

0six
Dirt Full Roller

Total posts: 52
posted July 26, 2004 09:23 PM  
ARE YOU WELDING THEM WITH NICKLE RODS IF NOT THAT COULD BE WHY THEY ARE BREAKING

powerglides
Dirt Freak

Total posts: 374
posted July 27, 2004 04:59 AM  
If you do go with a mini spool buy only a coleman they are far superior to other spools. part # 801-250 I think

bm4183
Dirt Full Roller

Total posts: 39
posted July 27, 2004 06:21 AM  
Well I just found out last night that the first guy who welded them didn't use nicket rods. He has been racing for years and said that he's welded numerous rears w/o ever using nickel rods and not one has ever broke. I'm not sure if the second guy used nickel or not. I guess I just shouldn't have assumed anything. I did find someone else that is going to weld them again WITH nickel, so I'll give it another try before I go with the spool.

51racing
Dirt Maniac

Total posts: 138
posted July 27, 2004 08:51 AM  
Not that I'm a professional welder, but my brother is and did mine, so here's a few tips.

Clean, clean, and more clean. Find someone that's competent with a TIG, and use that. Heat the **** out of it with a torch before welding.
Tack in several spots first, and flip side to side. We probably spent 2 hours doing it slowly and correctly. I drive mine on pavement when driving to do a little testing and it's holding up fine.
Hope this helps.


autoshop
Dirt Freak

Total posts: 298
posted July 27, 2004 03:43 PM  
don't weld the spider to each other ,weld the grooves that are exposed, it works better to fill up the 3 grooves on one side of the spider and two on the other side. then the spider can't turn and locks the wheels and still has a little play or give in them. Yes heat the spider before welding them and i us any type of rod on them even mig weld , then reheat them and quench them and your good to go.

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 27, 2004 08:54 PM  

 
i use a mini spool in my gm 7.5 before that i had a powertrax locker but many guys i know have welded them and have nutting but problems

on a different note they do make rod especially for welding cast i have some for welding manifolds i would have to check my reciept to see if it is the nickel rod you all are talking about
the reason it could be breaking also is the carrier shifting try a aluminium cover that has set bolts on the caps (drag racing cover) i have used one for 2 years and only broke 1 axle (not including 2 from flipping) but the one was from someone hitting me in the wheel
as i drive a figure 8 car

JohnG
Dirt Maniac

Total posts: 137
posted July 29, 2004 04:28 PM  
the spiders arent cast iron.

so welding them is no problem.

I turned my miller 185 up to 5, 6 is too hot for anything, and filled the grooves in the spiders.

havent broken any yet, 510-550 horse on pavement with 10 inch slicks..


quietmans
Dirt Forum Racer

Total posts: 97
posted July 29, 2004 04:33 PM  
We have always welded inside the grooves and never weld them together,have not had a problem in 10 years or so.This way gives you a little give and will help keep them from breaking.

speedyd1
Dirt Maniac

Total posts: 170
posted July 30, 2004 06:39 AM  
i think i would ask the guy which method of welding he used. sounds to me like he probably arc welded them. he probably didnt get the penetration he needed.we mig ours and have had absolutely no problems at all.

Ego Racing
Dirt Forum Champ
Total posts: 724
posted July 30, 2004 12:24 PM  
Take an old head blot and grind it so it fits into the grooves tightly. Put them in place and weld them into the gears. Then weld a pass over everything.Turn it over and do it again with the bolts as much as you can. We ran this setup for over 17 years and never broken one. I don't know about just welding the teeth, They would be banging into each other and making metal chips that go through your rear gears and the tapered ange would cause the gears to press out against the case and you may brake it. Welding them together makes it like a mini spool. Using the bolts jams them with a hardened peice and your welds just hold everything together.

quietmans
Dirt Forum Racer

Total posts: 97
posted July 30, 2004 02:16 PM  
I think you misunderstood what I meant.In the end the gears are solid in between but not welded to each other.Also run this type setup on a car I run on the street for 6 years with no problem.Just not putting a bolt in there.

WesternAuto17
Dirt Forum Champ
Total posts: 569
posted July 30, 2004 02:51 PM  
I'm all for saving money, but a mini spool is like 30 bucks. Wouldn't it be alot less trouble to just use a spool?

Ego Racing
Dirt Forum Champ
Total posts: 724
posted July 30, 2004 03:23 PM  
Not welding them together will allow them to wedge into the carrier. We use the bolt and weld it solid method and I have broken some axels (Stock and aftermarket) but not the center.

robhbk24
Dirt Freak

Total posts: 372
posted July 30, 2004 03:45 PM  
i have been just filling in the teeth for about 7 or 8 years now and my dad has done that since the early 70s with no problems. there is a little play but not enough to hurt anything. there is a magnet on the inside of my cover and there is never more than a little shavings stuck to it, chalk that up to normal wear

0six
Dirt Full Roller

Total posts: 52
posted July 30, 2004 10:27 PM  
30 bucks for a mini spool for a 10 bolt?
ill take a few of them.
try 90 bucks.

maniac motors
Dirt Maniac

Total posts: 128
posted August 14, 2004 08:00 PM  
80.00 from behrents the one i got is by affco and have 11 races on IT AND EVEN DESTROYED A AXLE AND HOUSING AND THE SPOOL IS perfect still welds never held didnt matter how or who welded them eventually i broke them

    

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