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Subaru drivetrain/engine for mid engine conversion
Posted 23 May 2011 - 09:25 AM
Any thoughts? Will this old drivetrain work with me or be a royal PITA?
Basically want to run a mid/rear engine wheeler with 4wd. Will the transaxle and rear diff cooperate with being flipped?
Posted 23 May 2011 - 09:31 AM
I dont know the specifics, but f you know to look at nissan parts for the soob trans, that might get what you are looking for.
go with the 5spd trans from 85 and later gl subarus
Posted 23 May 2011 - 09:52 AM
I'm delving into dark waters here, all my experience is with toyota mr2's, so different kind of monster.
Posted 24 May 2011 - 08:42 PM
There is a guy making reverse cut ring and pinions for subaru AWD transmissions. You use an AWD transmission, use a splined coupler to make it FWD, grind out some casting ribs inside the front diff area of the case, put the reverse ring and pinion in with the diff flipped, use custom axle stubs to go to VAG CV cups, and build mounts for it. It's a lot of work, and spendy.
Here's the alternate solution: Use the portal axle gear reduction box's out of an early bus. It would take some fabrication to mate those to the IRS
rear control arms and use a CV axle instead of swing arms, but that gets you the reversal of direction, better ground clearance for the subaru oil pan, and gear reduction for bigger tires all in one.
For the front diff, use a subaru rear diff, flip it upside down, and install the cover right side up to keep the vent and fill plugs in the right spots. It's not perfect, and you will have to do some figuring on what ratio to run to match the transmission final + the bus portal boxes, and you can use different tire sizes front to rear to make up for small differences. Subaru diffs are available in 3.54, 3.7, 3.9, 4.11 and 4.44. Your 80's GL box is a 3.9 most likely.
Edited by WoodsWagon, 24 May 2011 - 08:50 PM.
Posted 26 May 2011 - 09:15 AM
Posted 03 June 2011 - 11:14 PM
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