Cast iron welding repair - Saginaw transmission

[@MarcoPono]

Thanks for letting us hang out at your shop, I learned a lot.

[@RC-Heli835]

Good job man! The Tig torch rocks on castiron with nickel rod. All my cast iron repairs have been made with stick welding nickel rod. The hardest one to do was a gear box on a walking motor on a P&H backhoe. There wasn't time to take the box off as I had traveled 250 miles to fix it with limited time on the weekend. All vertical welds on the box just inside the tracks up front. It seeped a little oil after the repair but never dripped. My dad was able to use it until he sold it several years later. Without the repair it was unusable because of oil loss. When stick welding Nickel rod on cast iron its very bright and burns quick with so smoke its very hard to see what your doing. I'm gonna try Tig on my up coming repair. Thanks for sharing!

[@scroungasworkshop4663]

Wow, that poor old “sag” must have copped a flogging to crack like that. I was really surprised that you were able to leave the gear set in it. I assumed that it would be mandatory to pull them out. Nice repair, I learned a lot. Thanks and cheers, Stuart 🇦🇺

[@stephenrolheiser6261]

Nice work and the video was well done!

[@SFWD203]

Nice work dude! Look forward to more videos!

[@100texan2]

Looks good. Good job repairing that cast iron. Welding Cast iron can be a bear.

[@georgeloyie7456]

Dude, you've got a steady hand and a good eye for setting it all up to surface machine. You could do heads. You wouldn't believe the things we did with fairly little in as far as machining tools in the late 70 and early 80s.

[@shopdoc]

That was done extremely well! You got some serious skill!

[@josephleister9198]

Really nice work Bro, thank you...

[@bayoupirate3808]

Thank You. Blessings for the present and future.

[@snake_eyes_garage]

Thanks for taking the time to document this process. I was unsure if you went ahead and built up a bridge on the cover. I have a few projects I’d like to do like this. Any tips on the welder configuration and tools you use are appreciated.

[@grade8motorsports]

Hi Conrad, the cover was bridged with weld material since the broken pieces weren't worth trying to weld back on. As far as the welder, I have an HTP 221 tig machine, but not much amperage was required because of the preheat, so a smaller machine would work on this type of repair. Other tools used in this video were just torch for the preheat, a die grinder with a carbide burr, and the Bridgeport for the resurfacing. Thanks for the comment!

[@michaelmayfield4304]

First time here - it's a year later. Very nice welding job. I would love to know how the welding of that cast iron held up.

[@metalillness5951]

Nice job setting it up on the Bridgeport. Cast iron repairs are always a pain if you can't have a bare casting and tremendous heat source like a proper oven. You did well with what you had to work with!

[@adrianhernandez7007]

This was pretty darn good video to me you got a subscriber today

[@c.lalnunfela3572]

Before welding how much temperature did you are using for heat treatment can you please tell me?

[@junior1138]

Looks like a solid repair. Would the case not stand up to the stitching process?

[@davidemarchi6366]

But...why you don't dissambled the gears of transmission?

[@buhaykabos609]

Great job

[@sighpocket5]

Nice!!!!!!( you did good👍👍👍)

[@bostonrugburn]

Well about time.

[@richpitty]

Does the ni 99 work better on cast than using 309? Just a question I’ve had good luck with 309 on castings but anything to make life easier I’m in

[@grade8motorsports]

If I were welding dissimilar metals to cast iron, I probably would have used 312 or 309. Since this was all cast iron, I decided on the Ni99.

[@jmyers9853]

its been a year, any comeback?

[@grade8motorsports]

My buddy ended up selling the car to a guy a few hundred miles away for way more than he had into it, so unfortunately, I can't track it down to see if the repair has held up well.

[@Lovenpain]

Good video!

[@SE45CX]

Well done sir. Can I ask a little question. I would be interested to also buy an 99% Nickel welding rod for cast iron repairs. As I plan to order much other stuff from McMaster-Carr I'm looking specifically at part 7972A35. However they have a parameter called Welding Current Designation and that is specified as DCEP! This confuses me because a DCEN setup (the torch on the negative terminal) is so common. Did you use DCEN setup?

[@grade8motorsports]

This was done with standard DCEN tig welding.

[@SE45CX]

@@grade8motorsports Thanks, I really appreciate that!! Still plenty of things to get right when doing my own cast iron repair. But at least I know I'm ordering the right welding rods for it. And use standard DCEN, like I assumed it should be done..

[@habitoucheismail5662]

Good job thank you for this

[@kennethgrimes5494]

I love fixing shit like that, great sense of accomplishment awesome repair brother. Hope your sniffels get better.

[@tonywright8294]

I love fixing shit ? How do fix shit you wanker

[@svjofficial8580]

You have to show pre heating temperature.

[@Dsr122076]

Probably a death sentence for the transmission. You welded with the gears there and if you managed to to get slag onto the gear, machining with the gears there was sure to get debris in the gears

[@tonywright8294]

Why didn’t you just file it flat ? Cast iron is so soft

[@jondavidmcnabb]

Is there a reason you didn’t disassemble the case before welding?

[@grade8motorsports]

Hi Jon, the customer didn't want the added expense of disassembly/reassembly.

[@Twizter68]

@@grade8motorsports You should have told the customer that wasn't optional. Way too easy to ruin a gearbox by grinding and welding with the geartrain installed.

[@ramakrishnanbalaji1528]

Can you tell me the filler rod specs. I am welding a cast iron pipe.

[@Faolan161]

@@Twizter68 expertise comes from successes from less than desirable conditions. A new upgraded case that didn't break would also be the best, but finances and optimization does not always equal another's resources. I once welded a rear dually rim with a propane cutting torch and arc welding rod. A replacement was no longer available, and I had a steel inner for support, so I chanced it. 18 years later is when I found a set of rims I liked better. I did what nobody would do for me, and it lasted. It wasn't perfect as I had to air up the tire about once a year, but nobody could tell the visible face of the rim had a 5" section refabricated. The fearful ones will never attempt these things, and professionals assess the risk. But experts know their boundaries and educate their clients. Never take chances, and you never find your limits. I believe he said he was doing this for a family member, not a client..... client's choice.

[@yamahajapan5351]

99 rod is readily machinable as opposed to other nickel TIG rods for cast. You could have draw filed this in 5 minutes….Oh, and it will crack again….

[@mattwoody1089]

You wrecked what was fixable dude

[@jasonmartin-serrano2753]

I us to blow those things up every time I hit third, with only about 500hp...lol...not worth the repair.