R180 into GC: How much PITA?

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Pete
I think you're missing one critical aspect...

I really don't see why you edited your post from the "front diff is sitting on a bench" part? Ok, so you are rwd.

In that case, see Dave's response. All the doriftor boiz that are running rwd Subarus are snapping R160 style axles, not diffs. If you are going to do it, you might as well do it all while you are in there. Or, if this is the first R160 you've broken, slap another one in there for $50 and see how long it lasts.

Eww.. RWD Impreza. Just buy a Miata and be done with it.

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Grant Hughes

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NoCoast
Just buy a Miata and be done with it.

The gender swap?

If it was my car, it'd be getting the engine shifted back and the subframe shifted forward as much as practical, and the whole rear would get yanked out in favor of a solid axle, maybe a Ford 7.5" for cheapness/lightness...

I do tend to overthink things though.

Neat trivia - the R160 is almost the same size as a 1.6 Miata's rearend, which also would grenade rapidly behind a largish engine. Hell they would grenade behind 1.6s...

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Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.



Edited 1 time(s). Last edit at 07/20/2016 12:24PM by Pete.

I haven't had both apart to compare, but I'd be willing to bet that all of the suckers are made by Hitachi - I don't know but would not be surprised if the long-pinion Mazda 7" is functionally identical to the R180. Unfortunately none of the spline counts work out quite right to just use an RX-7 centersection with Subaru axles.

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mekilljoydammit
I haven't had both apart to compare, but I'd be willing to bet that all of the suckers are made by Hitachi - I don't know but would not be surprised if the long-pinion Mazda 7" is functionally identical to the R180. Unfortunately none of the spline counts work out quite right to just use an RX-7 centersection with Subaru axles.

Yeah probably.. But the seem to change junk like ring gear bolt circle stuff like 12 x 10mm on this circle vs 10 x M11 on that circle and and then sudden SURPRISE!!! 1 spline different like the notorious running change in the Misterbitchy Eclipsed and Gaylant transfer diffs..
I can see Japanese Engineeah "soooo sorry, round eye"

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John Vanlandingham
Sleezattle, WA, USA

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Quote
mekilljoydammit
I haven't had both apart to compare, but I'd be willing to bet that all of the suckers are made by Hitachi - I don't know but would not be surprised if the long-pinion Mazda 7" is functionally identical to the R180. Unfortunately none of the spline counts work out quite right to just use an RX-7 centersection with Subaru axles.

Mazda was from a different zaibatsu from Nissan/Subaru/Hitachi... Nissan/Subaru have a lot of Hitachi parts for this reason, while Mazda has Mitsubishi logo on a lot of hard parts/electronics.

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Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.