Can you swap transmission internals into a new housing instead of welding?
Welding a cracked transmission housing carries a high risk of failure and future complications. Instead of risking a weld, you can extract the working internals, clutch pack, and mechatronic unit and transfer everything into a healthy donor case to ensure the repair is done properly.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Welding the cracked aluminum housing
- 2Sourcing a used donor transmission case from a junkyard or a blown unit
- 3Spending hours reading manuals and guides to figure out the repair process
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Back driver side rim was getting more diff oil than my aunt's salad gets the 'Skinny Girl' dressing brand. Pulled the axle and its as much of not more than my little girls dress leaves on every thing it touches.”source ↗
“If this much glitter is here, its EVERYWHERE, so don't i have to gut the whole axle housing? Replace all seals? How do i clean the axle tubes, take it off the truck / case of break cleaner on each side?”source ↗
“Is it possible to extract a perfectly working DSG transmission (internals, clutch pack, and mechatronic) from a cracked housing and swap everything into a new, healthy donor case?”source ↗
“My mechanic is a bit confused and is mentioning risk welding it and I don’t like the idea of something going wrong later.”source ↗
“If I am taking the dsg out better do it properly.”source ↗
Where this came up
People with this problem also raised
- 3Can you use RTV silicone to patch a hole in a timing belt cover?
- 6Why does my exhaust manifold gasket keep blowing out?
- 3Can a damaged plastic bumper cover be repaired with heat?
- 2Temporary fix for a snapped coolant expansion tank nipple
- 6How to fix a leaking exhaust pipe with wrap on it
- 2Passenger side transmission axle seal leaking after replacement