RX-7 LSD Question
#1
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From: Centennial, CO
RX-7 LSD Question
Hey guys, if any of you have your RX-7 LSD out of your car, i was wondering if you could measure something for me. I need the thickness of the outer part of the shell for the end that does not have the ring gear attached to it(the left side). In this picture:
I'm talking about the thickness of the left lip of the two halves. The reason I ask is because I bought 2 units (one from an automatic RX7, one from a manual) and the difference between them is visibly noticeable, measured around .060". I'm wondering if one of them had been machined down in substitution of shimming or perhaps it was just a casting difference (there are differences in the castings, probably from different years).
Another funny thing I noticed between the two, looking from the outside in one of the side openings where you can see the plates, what looks to be the friction plates (they have small grooves on one side of them), on one, the grooves of two visible plates are facing the same way, where as on the other one, 2 plates grooves are facing each other, as if someone may have opened the differential at one point (this is the one with the smaller lip).
I realize my questions could probably be answered by opening up the differentials themselves, but I was hoping someone could help me before I do that. Thanks!!
I'm talking about the thickness of the left lip of the two halves. The reason I ask is because I bought 2 units (one from an automatic RX7, one from a manual) and the difference between them is visibly noticeable, measured around .060". I'm wondering if one of them had been machined down in substitution of shimming or perhaps it was just a casting difference (there are differences in the castings, probably from different years).
Another funny thing I noticed between the two, looking from the outside in one of the side openings where you can see the plates, what looks to be the friction plates (they have small grooves on one side of them), on one, the grooves of two visible plates are facing the same way, where as on the other one, 2 plates grooves are facing each other, as if someone may have opened the differential at one point (this is the one with the smaller lip).
I realize my questions could probably be answered by opening up the differentials themselves, but I was hoping someone could help me before I do that. Thanks!!
#2
bringing it up from the dead because i was wondering the same thing. Anyone know of any difference how it is flipped around? (probably wont make sense if youve never seen it before). Also if there is any advantage to either shim stack order:
84-85 is plate-clutch-plate-clutch
86-88 is plate-clutch-clutch-plate
84-85 is plate-clutch-plate-clutch
86-88 is plate-clutch-clutch-plate
#3
ok... 3rd question in this thread that probably won't be answered...
"*note: The 85-85 LSD will fit, however, the housing is not compatible....unless you want to convert to a solid rear axle "
Does this mean that the LSD will fit in the stock 1.8L housing, but you can't use the RX7 housing (i know the rx7 is solid axle)? The wording is a bit confusing, I'm an engineer so the whole written language thing is baffling me.
"*note: The 85-85 LSD will fit, however, the housing is not compatible....unless you want to convert to a solid rear axle "
Does this mean that the LSD will fit in the stock 1.8L housing, but you can't use the RX7 housing (i know the rx7 is solid axle)? The wording is a bit confusing, I'm an engineer so the whole written language thing is baffling me.
#4
bringing it up from the dead because i was wondering the same thing. Anyone know of any difference how it is flipped around? (probably wont make sense if youve never seen it before). Also if there is any advantage to either shim stack order:
84-85 is plate-clutch-plate-clutch
86-88 is plate-clutch-clutch-plate
84-85 is plate-clutch-plate-clutch
86-88 is plate-clutch-clutch-plate
I went with disc-plate--disc-plate as most af diffs are this way whether that makes it lock up better or not I do not know.(mine is an 87 btw)
Your plate looks fucked also and I wouldnt reuse it.
#5
ok... 3rd question in this thread that probably won't be answered...
"*note: The 85-85 LSD will fit, however, the housing is not compatible....unless you want to convert to a solid rear axle "
Does this mean that the LSD will fit in the stock 1.8L housing, but you can't use the RX7 housing (i know the rx7 is solid axle)? The wording is a bit confusing, I'm an engineer so the whole written language thing is baffling me.
"*note: The 85-85 LSD will fit, however, the housing is not compatible....unless you want to convert to a solid rear axle "
Does this mean that the LSD will fit in the stock 1.8L housing, but you can't use the RX7 housing (i know the rx7 is solid axle)? The wording is a bit confusing, I'm an engineer so the whole written language thing is baffling me.
#9
bringing it up from the dead because i was wondering the same thing. Anyone know of any difference how it is flipped around? (probably wont make sense if youve never seen it before). Also if there is any advantage to either shim stack order:
84-85 is plate-clutch-plate-clutch
86-88 is plate-clutch-clutch-plate
84-85 is plate-clutch-plate-clutch
86-88 is plate-clutch-clutch-plate
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