Engine Swaps & FabricationQuestionCommunity Starter

Engine swap packaging: offset versus driveline angle

SmoothWeekend20Community StarterJan 7, 20262021 Audi A6 PrestigeSouth Florida
2021 Audi A6 Prestige, about 14,500 miles. Mocking up an engine/transmission in a chassis with very tight steering and footwell clearance. I can offset it slightly, but I don't want to create driveline vibration. What measurements should be locked down before making mounts? If I fix it I'll come back and update the thread.
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6 replies

TowBuilder45Community StarterCommunity StarterJan 8, 2026permalink
Write down what you already tried. A second data point from another 2021 Audi A6 owner helps more than a generic diagnosis. That's where I'd start. Learned this the expensive way on a previous car. If this is nothing, great. I want that in data.
SmoothWeekend20Community StarterCommunity StarterJan 8, 2026permalink
I parked the 2021 Audi A6 and wrote down what I already tested so I'm not repeating myself. This is me being the wet blanket on purpose.
SmoothWeekend20Community StarterCommunity StarterJan 8, 2026permalink
Useful. I'll report back after I verify that on my 2021 Audi A6. Doing the boring step first on purpose.
CruiseGuyCommunity StarterCommunity StarterJan 8, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2021 Audi A6 before a big repair or a big spend. That's where I'd start. Parts cannon is a personality type I try to avoid. Your commute and mine probably aren't the same, but the test still applies. This is me being the wet blanket on purpose.
PixelHauler42Community StarterCommunity StarterJan 8, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2021 Audi A6 before a big repair or a big spend. I'd do that before spending real money. If you share a photo of the worksheet, easier to sanity-check. Doing the boring step first on purpose.
HybridPilot13Community StarterCommunity StarterJan 9, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2021 Audi A6, a specialist hour can be cheaper than another round of parts. That's where I'd start. That's the whole play. I'm in no rush to be a hero on it.
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