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Audi B4 FWD to Quattro swap – Part 1 – Investigation
Looks like a lot of people want to do this and there are no good answers out there regarding this swap…I’m lucky to have a B4 FWD and a B4 quattro cars in my garage so it’s very easy to compare…There’s some information out there saying that the mounting locations for the quattro are already there for the FWD system and everything will swap directly – it doesn’t look like it from what I can see…at least 2/4 mounting holes will need to be drilled/tapped…Here are some initial observations…
1. the shocks mounting is identical between the FWD and quattro chassis
2. looks like the shocks themselves are identical as well – the quattro version has them slightly twisted but the setup looks the same – this makes things very easy because it looks like when it comes to shocks and springs a FWD and quattro cars have identical setups…this also means I can now use springs off a quattro car…the “FWD” version is not available in NA
3. there are 4 attachment points to the ‘quattro’ part of the equation – you all knew that already…the question was whether everything quattro will swap directly over…after a good hour of staring at the four bolts it looks to me that 2/4 bolts match…the back two holes need to be drilled/tapped into the frame…everything else looks identical
4. can’t see much with the fuel tank in but looking from the top the floor plans look the same so i`ll assume attaching the back end of the quattro should be rather trivial
here are some pictures to help show some of the differences…
FWD – passenger side – looking from the back towards the front – this is where the back quattro bolt should be..I was hoping the bolt holding the exhaust hanger will match up but no dice…the diff mount sits forwards of this bolt…

couple of shots of the front subframe mount on the FWD…there are 3 bolts holding it to the chassis…the bolt on the left matches the front diff mount bolt…looks like this one will be plug and pay…


the quattro front bolt:

same bracket on the passenger side:

and the quattro version:

the quattro setup is very ‘busy’ making it hard to take good shots and measurements…it will be easier to just drop everything down and mount it up on the FWD to see how things look…I will do that very soon and post more information…












