Few questions about the gear ratio swap...

mrcare · #1 12-30-2004, 01:52 PM

So I am getting ready to do the gear ratio swap, but I have a few questions.

What years what models can I get the 4.44 gear ratio rear end from?

Is there anything special I need to do to get the new gears in?

Where can I find a used complete trans?

Where is generally the best place find these?

Whats the going rate for trans and rear end?

and

Has anyone accurately calibrated the speedometer after the swap?

lee · #2 12-30-2004, 03:36 PM

Quote:

Originally posted by mrcare
So I am getting ready to do the gear ratio swap, but I have a few questions.

What years what models can I get the 4.44 gear ratio rear end from?

Put 4.44 and 4.11 into the search function, it's been asked (by me for one) and answered

Quote:

Originally posted by mrcare
Is there anything special I need to do to get the new gears in?

You will need a grinder to take out some metal bumps in the new rear diff - once you have the new rear diff and the SVX diff opened up you will see what has to be done. It would take days with a file, so an air or electric powered grinder is the only real solution.

Quote:

Originally posted by mrcare
Where can I find a used complete trans?

Wrecking yard

Quote:

Originally posted by mrcare
Whats the going rate for trans and rear end?

I paid $850 for a 98 Imprezza (4.11 auto transaxle with 29K miles on it, 6 months warranty) and a 97 Legacy (from a manual shift) rear diff from a local yard - we don't have many Subies in FLA so it may be cheaper elsewhere where they are more plentiful.

Quote:

Originally posted by mrcare
Has anyone accurately calibrated the speedometer after the swap?

The speedometer remains as accurate (or inaccurate) as before the swap. The speedo sensor measures the rotation in the front differential at the axle rate of turn, so gearing makes no difference.

mbtoloczko · #3 12-30-2004, 04:46 PM

Quote:

Originally posted by mrcare
So I am getting ready to do the gear ratio swap, but I have a few questions.

What years what models can I get the 4.44 gear ratio rear end from?

...

Here is a list of a the final drives in several Subarus:

http://wac.addr.com/auto/obs/lsd/lsd.html