al tranny bell hsg cracks

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Junk yards send pull outs to repair so they can sell. Busted in wreck or in removal? Grind out cracks preheat, weld, then postheat. Used weed torch for heat. Don't be tempted to spot heat (red box) heat front to back (green box). Could have removed bell and put in oven but this was faster (cheaper).Held torch on for about 8 sec. Waited about 2 min heated for 8 sec then started welding. welded about 4-5" then heated for 5 sec, repeated untill finished welds. Heated  for about 5 sec for post heat. Checked with IR thermometer, the area ranged from 290 to 310 degrees.Ground with flapwheel then used needle scaled to blend.TIG, 4043 filler. Attached Images
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Reply:B-E-A-utiful
Reply:Originally Posted by oxy moronB-E-A-utiful
Reply:Nice job.So some loser ends up with a tranny that's been cracked and he didn't know it. Bummer.Lincoln Power Mig 210MP MIGLincoln Power Mig 350MP - MIG and Push-PullLincoln TIG 300-300Lincoln Hobby-Weld 110v  Thanks JLAMESCK TIG TORCH, gas diffuser, pyrex cupThermal Dynamics Cutmaster 101My brain
Reply:what junk yard is this that you speak of so I never go there, altough I would if it was your welding all the time ... nice work, just seems a little dis honest if they don't disclose that the case was welded"Obstacles are those frightful things you see when you take your eyes off your goal"   -Henry Ford
Reply:Originally Posted by castweldJunk yards send pull outs to repair so they can sell. Busted in wreck or in removal? Grind out cracks preheat, weld, then postheat. Used weed torch for heat. Don't be tempted to spot heat (red box) heat front to back (green box). Could have removed bell and put in oven but this was faster (cheaper).Held torch on for about 8 sec. Waited about 2 min heated for 8 sec then started welding. welded about 4-5" then heated for 5 sec, repeated untill finished welds. Heated  for about 5 sec for post heat. Checked with IR thermometer, the area ranged from 290 to 310 degrees.Ground with flapwheel then used needle scaled to blend.TIG, 4043 filler.
Reply:What would cause a case to crack like that?  Something blowing apart inside?
Reply:nice work castweld! i also use a needle scaler when doing cast repairs, not only blends a repair so that you can hardly tell there ever was a crack, but also relieves the stress as well! i use my scaler on a daily basis, i think its a must have tool for all weldors! again, nice job.  rob.millermatic 200 millermatic 150miller bluestar 2Epurox / oxweld O/A
Reply:Originally Posted by Joker11Nice job.So some loser ends up with a tranny that's been cracked and he didn't know it. Bummer.
Reply:Nice fix Originally Posted by WeldordieWhat would cause a case to crack like that?  Something blowing apart inside?
Reply:Originally Posted by Joker11Nice job.So some loser ends up with a tranny that's been cracked and he didn't know it. Bummer.
Reply:If that is the extent of the junkyards trickery they have very lucky customers, I always perfer the pick your part junkyards. Ifigured I was more likely to get a good part that way. Unfortunantly I no longer live near one.Tough as nails and damn near as smart
Reply:do you check the bellhousing flange for flatness after welding?We tigged up a Tremec for a local buddy (who bought it cracked & cheap)...and after welding, we had (considerably) more time in filing the case flat & square with the input shaft than in the welding.and it's holding up fine after more than a year behind a boosted 302very nice welding...though I might have some reservations about it being a "legitimate" repair if the bellhousing/mating flange is distorted (or not checked at all)Millermatic 251Syncro 200
Reply:If Peter welded one  of the junkyard parts I've purchased over the years, I'd feel pretty damn lucky.
Reply:Originally Posted by golferdo you check the bellhousing flange for flatness after welding?We tigged up a Tremec for a local buddy (who bought it cracked & cheap)...and after welding, we had (considerably) more time in filing the case flat & square with the input shaft than in the welding.and it's holding up fine after more than a year behind a boosted 302very nice welding...though I might have some reservations about it being a "legitimate" repair if the bellhousing/mating flange is distorted (or not checked at all)
Reply:Originally Posted by RWS WELDINGnice work castweld! i also use a needle scaler when doing cast repairs, not only blends a repair so that you can hardly tell there ever was a crack, but also relieves the stress as well! i use my scaler on a daily basis, i think its a must have tool for all weldors! again, nice job.  rob.
Reply:Originally Posted by ItsAdam1Okay give me some for info on the needle scale I see them at tool stores and always wondered what the hell they are for....