Hi all, been given an impreza (you think this would be a good thing, it is but she needs alot of work) I need a new rear differential and was wondering about the ratios. Does it really matter that much? Can i do a conversion and would I have to change the front?

If anyone knows the ratio on my model that would a great help! It's a 98 impreza r sport 2.0l (non turbo)

Any help would be appreciated.

Cheers guys

Short ratios for acceleration and long for top speed

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It's an 4wd so would it not need to match the front?

If memory serves yes not 100% on the ratios but sombody is probably breaking one on ebay

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If you change diff you'd need to change driveshafts &hubs or you'll have all sorts of issues.

Yours will more than likely be 4.111.

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On turbo models Google your gearbox ty#### number to find the ratio and find a second hand diff of the same ratio .

The only reason that you'd need to change the rear drive shafts on a turbo model would be if you don't use the same type . As well as the differences in ratios there's 2 types of diff r160 (thinner drive shafts and different hubs/smaller discs)

R180 (thicker drive shafts ,stronger hubs and bigger hand brake shoes/ discs)

The above differences are on turbo versions I'm afraid I'm not sure if there's another different type of diff used on the non turbo versions as well.

So definitely give the gearbox ty### number on the white sticker on the bell housing a Google to be sure