Well in fwd application, the starter is on the intake side, since the blacktop exhaust interfer with it, it is a problem with mr2 (aw11) owners who have the old c50 tranny, since their is no provision to bolt the starter on the intake side while the c52 has... I'd like to see an example of someone trying to bolt the sr5 bellhousing to the 4age and failed... the only problem I could see with using the sr5 bellhousing, is that since the starter is on the passenger side, the clutch fork is actuated on the driver side and might be too close to the exhaust so you would have to shield it (and the slave cylinder) with a custom made heat guard in order for it not to burn due to close proximity with the exhaust. But the exhaust on the sr5 already passes close by, so I guess it won't be much of a problem...
I have read numerous post that tells you to get a gts bellhousing, but none where saying I tried and I failed because it doesn't bolt up, just that the stock 4age rwd exhaust hit the slave cylinder...
ince you don't have a stock manifold for the 4age rwd, you will have to locate one and the cast manifold sucks anyways. So instead of buying a gts exhaust manifold, a gts bellhousing, change the starter wiring to the other side, extend your clutch line to the other side... which will cost some money, invest it in a custom tubular exhaust manifold that follows your stock exhaust routing (away from the slave cylinder), you'll get more performance out of it and will end up costing you about the same and saving you a lot of headache with the other stuff... just my 2 cents...
Have a look a those picture of a 4age tubular header
http://forums.club4ag.com/zerothread?id=6239 scroll down to a little below the middle of the page where he shows the steering rack and you'll see the space between the bellhousing and the exhaust (this is a gts bellhousing and you can barely see the stater at the top) the clutch slave cylinder on a sr5 would be situated a little below... which in my mind leaves lot of space to put a heat shield between it and the exhaust...
Here is an example of a 20v in an older corolla but with the slave cylinder on the exhaust side...
http://www.rollaclub.com/board/topic...-ae71ae86ke70/
oh and for the record, the gears ratio for the sr5 is the same as the gt-s one, and the same as the 2t-c, 3t-c, etc... the bearings are also the same between all the t50 bolted on a 4a engine (not the same as the early 2t though) so it is not any weaker or stronger thant the gt-s one.
The rear (differential and axle carrier) is a little weaker (according to everyone), but uses the same axle as the early gt-s... the crownwheel diameter is 8mm smaller, but since you have a 4 pinion carrier (instead of the 2 pinion the gt-s has) my bet is the strength difference must not be very big... and since you have a 3.909 rear ration (instead of the 4.300 for the gts) you will put less strain on the axles (torque applied on the axles is multiplied by the same factor as the reduction between the pinion and the crownwheel) less steep = less torque to kill your axles splines. For LSD option, you are pretty much fucked but that is all...
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