The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 3 speed transmission with odd hole in case

68gmsee · 04-04-2018, 11:53 AM

Yeah, welding or brazing may be a challenge that's why it should be done by someone experienced in doing it. Either way, you can clean around it real good to see if it's just the hole or if there are cracks around it. It's possible it may have been a casting defect that went unnoticed.

I once had a 2 inch hole in a block welded that was caused by a piston rod cap coming loose. Even though the welder did a good job, it still oozed a small amount of oil around it due to heat stress fractures. I still drove the truck for several years before selling it.

04-04-2018, 11:53 AM	#5
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 3 speed transmission with odd hole in case Yeah, welding or brazing may be a challenge that's why it should be done by someone experienced in doing it. Either way, you can clean around it real good to see if it's just the hole or if there are cracks around it. It's possible it may have been a casting defect that went unnoticed. I once had a 2 inch hole in a block welded that was caused by a piston rod cap coming loose. Even though the welder did a good job, it still oozed a small amount of oil around it due to heat stress fractures. I still drove the truck for several years before selling it. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...