Who has welded a new perch on their diff ??????? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 04-13-2002, 08:48 PM Thread Starter
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Who has welded a new perch on their diff ???????

I am concerned about welding a new perch on my D44. I am converting a Waggy D44 to SOA. I need to weld a piece of 1/2" steel on top of the cast iron diff for a perch. I know lots of people have done this. What can I expect? Should I use a Stick welder with Nickel Rod? Can I do it with my 220v MIG? What wire should I use? How should I prep the cast iron?

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Tom
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post #2 of (permalink) Old 04-13-2002, 09:17 PM
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Re: Who has welded a new perch on their diff ?????

I did it on the street jeep with a nickel rod. It seems to be holding just fine. As for prep I just ground the area to clean it up. I asked around quite a bit about preheating and while it is recommended it is not required. Part of the reason is the diff is cast steel instead of cast iron (so I have been told).
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post #3 of (permalink) Old 04-13-2002, 09:42 PM
 
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Re: Who has welded a new perch on their diff ?????

Exactly right, the pig is cast steel so 6010 or 7018 will work good. I used my 220 mig front and rear, on the tubes and punkin, and it is still holding up perfectly after much abuse.
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post #4 of (permalink) Old 04-13-2002, 09:57 PM Thread Starter
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Re: Who has welded a new perch on their diff ?????

What kind of wire did you use with the MIG? Are you running Gas(CO2)?

Thanks,
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post #5 of (permalink) Old 04-13-2002, 09:58 PM
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Re: Who has welded a new perch on their diff ?????

Since we're on the subject.......if I was to narrow a front axle, can the knuckles be welded with 6010 or 7018 as well?
I have welded for a long time but never on axles. So what have you guys used when narrowing the front axles? peticularly when welding the knuckles?
Thanks Bob
post #6 of (permalink) Old 04-13-2002, 10:00 PM
 
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Re: Who has welded a new perch on their diff ?????

I used gas (co2-argon mix) and I used "Century" brand wire .030, part# 307020, Heat 5005427, Alloy ER7056 from Lowes Hardware store.

I have used 7018 and 6010 in the past with equally good results.
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post #7 of (permalink) Old 04-13-2002, 10:05 PM
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Re: Who has welded a new perch on their diff ?????

Tom
just curious, why did you go with the waggy front axle instead of a chevy with factory spring over? Was it the dimensions of the waggy or availability?
I'm asking because I have both axles available to me and just haven't made a decision on which to go with.
Thanks Bob
post #8 of (permalink) Old 04-13-2002, 10:22 PM Thread Starter
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Re: Who has welded a new perch on their diff ?????

I went with the Waggy because of the width. I didn't want to be as wide as a Chevy. I am also using a Waggy rear Model 20, so my widths are the same without modifications.

Later,
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post #9 of (permalink) Old 04-13-2002, 11:28 PM
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Re: Who has welded a new perch on their diff ?????

Knuckles weld fine with 7018.
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post #10 of (permalink) Old 04-14-2002, 04:30 AM
 
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Re: Who has welded a new perch on their diff ?????

While I cant tell you what wire or rod to use, I can tell you that you need to control the cooling of the welds. Just like cast iron, cast steel can crack or become brittle if it cools too fast. The solution is simple though, just cover the welded area with a welding blanket or several pairs of welding gloves(if you have a few laying around) to keep the heat in and allow the weld to cool slowly.
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