For those who bought the MFactory 26 spline LSD in the group buy, did the supplied bolts fit the holes in the ring gear? If your bolts didn't fit, did you try to get the correct bolts from MFactory or just have the ring gear holes enlarged? Are the correct bolts even available from MFactory? I hate to have to pay a machine shop to enlarge the holes as the ring gear is some pretty hard metal and isn't likely to be cheap.
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MFactory G Series LSD incorrect bolts
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Somebody else had the same problem and ended up getting their ring gear drilled. The machine shop did a crappy job though and made the holes too large.
http://www.wihandyman.com/forum/show...g-mfactory-lsd
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I think the problem was my cousin took it too the machine shop and didn't explain it right. I put it in as is haven't had any problems yet.
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The ring gear is centered on the LSD itself, not by the bolts. Ideally, you'd like the bolt holes as tight as possible but it shouldn't hurt anything too much if they're oversized a bit1991 Capri XR2 "GTXR2" BPT AWD Bastardization/conversion
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FWIW, I finally heard back form MFactory re: bolt issue. Bottom line as I suspected, upgrade to different ring gear or drill out the holes in the current ring gear. According to them, the undersized ring gear holes was a 1 in 100 chance and it was not cost effective for them to manufacture a different bolt to fit. Oh well, it was worth a try.
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It's a load of BS.... An 800$ differential should come with the right bolts. I just had the same problem, I spent an hour on the phone with the Honda tech guy, he measured a few Honda bolts and they wouldn't work. I told him my transmission was from a mercury capri(xr2 cable clutch G series) and he laughed, said I was trying to put a square peg in a round hole since its not a Mazda/ Ford g series, and I didn't get any help after that. He had been looking for an excuse to blow me off the whole time, tried to tell me I ordered the wrong one, but the only other options are 28 spline and a H series? Diff. He said he would tell the japanese guy to answer his emails, but after a week I got tired of waiting. I took the ring gear to 3 different machine shops and NONE of them could drill it, the metal was too hard. I ended up having to spend 20 minutes on each hole with a dremel tool and a stone bit(it was pink) to ream out the holes enough to get the shoulders thru. I HOPE the metals don't expand too much and pop the heads off the bolts. There wasn't much play in them, probably less than .005"...
I think they need to do some more R&D before they keep selling bad parts. What ya gonna do tho, Mazda diffs are junk and quaifes aren't cheap.Last edited by zoom-zoom; 04-15-2012, 06:20 AM.1993 Ford Festiva - Fiona/b6 swap
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The Diff's that Mfactory had per R&D there were zero issues.
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Im with Ryan, you have to understand that the G-series gearbox was used in 50 different cars over a 20 year period. There is bound to be some revisions in that time and a few oddball parts. If you have a problem with drilling a few holes out to a slightly larger size, than maybe you shouldnt be modifying a car.
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