Differential. Exchange of The ratio.

[DANGEL]

Hey folks,
Is there anyone in the forum who knows whether the inner workings of a 505 differential fits into that of a 504? Or from a 505 sedan to a rigid axle from the 505?

Thank you and best regards from Bavaria.

Jens

[V-M]

Should be same in 504,505,604, TAGORA except pickup models cause those have screw type rear axle.    

[Bean]

505 sedan and wagon differential internals (ring and pinions) are supposed to be interchangeable as well.  I’ve never done it, but I’ve heard it done from wagons to sedans for rally cars to get higher ratio gearing.

Rabin

[DANGEL]

Hey guys,
Thank you very much for your answers.
I thought it was like that too.
I think I've already read about it here. But I wasn't sure!
Here in Germany I can't get an answer to this question!
They're mostly just posers. Laughing at people who want to make drastic changes to your vehicle. At most they change the polish of the paint... Ok, that's pretty harsh, but it feels like it! ;-).

In any case, I want to change the ratio. And that raises some questions because I want a long ratio differential from a 505 with more than 100hp.
...and then for the front and rear. So there is independent suspension at the front and a rigid axle at the rear. I will try it!

The engine should have enough power (130 hp) for the higher ratio gearing.
The wheels are also a little bigger. Instead of 195/80 16, 225/85 16.
I wish I was further along. Our house fire set everything back a bit.
All the best
Jens

I will report to you...