1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Moser axles

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Old Feb 21, 2017 | 12:02 AM
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Moser axles

Is anyone still selling GSL SE Moser axles?

I've contacted Moser themselves but haven't heard back from them yet, just wondering if anyone knows a source.

Thanks
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Old Feb 21, 2017 | 08:26 AM
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I have a complete suspension setup for sale that includes these axles.

https://www.rx7club.com/1st-generati...rsion-1104679/
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Old Feb 21, 2017 | 08:03 PM
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Looks like a nice setup unfortunately lots of stuff I don't need or can't use!
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Old Feb 22, 2017 | 03:57 AM
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Check out my reply. Just redrill your GSL axles.
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Old Feb 22, 2017 | 01:56 PM
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keeping an eye on this. what's the reason ur wanting moser axles sommmatt? tried seeing if u had a build thread but did not see one.
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Old Feb 22, 2017 | 11:41 PM
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Originally Posted by craaaazzy
keeping an eye on this. what's the reason ur wanting moser axles sommmatt? tried seeing if u had a build thread but did not see one.
Exploring options for converting the rear of my car to 4x114.3 while still being able to buy parts off the shelf (or next day) if I'm far away from home or I need parts quickly. I don't want to have to find a machine shop willing to redrill brake rotors for me somewhere I'm not familiar or in the middle of nowhere. Additionally the longer axles provide for a larger potential track width which helps keep things even with what I have done in the front of the car.

Finding a complete GSL SE rear end or axles has been futile so far (for a reasonable price), so I was hoping I could still buy off the shelf Moser axles that would solve my problem for me. Not having much luck on that front.

I might have found a complete GSL SE local for basically scrap value since it's been sitting in one spot for god knows how long. Buying that is cheaper than just buying an axle.
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Old Feb 23, 2017 | 08:18 AM
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got it. thought maybe it was due to a swap and power limits of your set up. reason I asked is that i'm trying to figure out if the axles or the diff is the weak point of the rear end.
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Old Feb 23, 2017 | 08:27 AM
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I would imagine the diff is the weak link, but can't comment from experience. I haven't broken either yet, but then again my T2 setup is relatively tame compared to some...

I would not be comfortable redrilling GSL axles to the 4x114.3 pattern, that would place the new holes VERY close to the edge. It might last, but I would not be ok with it...

As for Moser, I saw your for sale thread, and the reply you got from them, I'm very surprised they can't look back in their records and get the ones they used to supply Re-Speed with. You'd think they would still have the specs in their system...
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Old Feb 23, 2017 | 11:01 AM
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good info. i'm only aiming 300 hp with the REW so hopefully will be safe (no hard launches, etc)
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Old Feb 23, 2017 | 09:34 PM
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Originally Posted by 82transam
I would imagine the diff is the weak link, but can't comment from experience. I haven't broken either yet, but then again my T2 setup is relatively tame compared to some...

I would not be comfortable redrilling GSL axles to the 4x114.3 pattern, that would place the new holes VERY close to the edge. It might last, but I would not be ok with it...

As for Moser, I saw your for sale thread, and the reply you got from them, I'm very surprised they can't look back in their records and get the ones they used to supply Re-Speed with. You'd think they would still have the specs in their system...
I'm sure if I could contact the right person there I could get the right info. When I initially emailed I definitely mentioned Re-Speed, and the fact that a local car that I know has a set of those axles in it right now, but the person on the other end didn't seem too interested. I understand it's a very small market but every year we have fewer and fewer part sources for these vehicles, so it's unfortunate that this one (maybe at least temporarily) is lost to us for now.

Maybe if Billy sees this he could help us out with who to contact or perhaps old invoice numbers or something, who knows.
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Old Feb 23, 2017 | 09:36 PM
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Originally Posted by craaaazzy
good info. i'm only aiming 300 hp with the REW so hopefully will be safe (no hard launches, etc)
Per Granny's

The stock RX-7 open rear is not very strong. It will get you from A to B, just don't abuse it. Spinning one tire with V8 power will soon be followed by grenading the spyder gears.

The limited slip diff from a '79-'85 RX-7 is much stronger. It's a 4 pinion clutch style unit that looks much like a scaled down Dana PowerLock. With 4 gears engaged in the axle gears instead of 2, it's roughly twice as strong as the open diff. The '84-'85 versions have larger diameter axles, and reach their limit at around 350-375hp.
GSL ring/pinions by math alone are stronger than GSLSE ring/pinions, but probably not enough to make a difference.
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Old Feb 24, 2017 | 08:18 AM
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here's info i found for the moser axles. call them up and see if they can track down by the part numbers provided here:
Custom Axles for 1st gen

i don't know axles so am not sure if the miata torsen makes any difference compared to stock length (in the link it says to shorten the axles by 2mm)
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Old Feb 24, 2017 | 09:09 AM
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I had come across that while googling but was unsure if those part numbers relate to "bolt in" axle replacements or if they were something special. Are they 4 bolt or 5 bolt or does that need to be specified upon ordering? Correct number of splines? Proper length out of the box? Seeing as the person who wrote that website updated that page in 2004, I was looking to hopefully verify those numbers on here or get some newer information. 2004 feels like only a few years ago sometimes, but in reality it was 13 years ago. Kill me.
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Old Feb 24, 2017 | 01:59 PM
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If using a Miata diff the axles would need to be shortened, so for your/our purposes no length changes would be made. Otherwise the numbers on that page should still be usable. I agree though, 2004 is an eternity in "internet years".

If I was not in the process of house shopping and had the time/spare cash to do so, I would pull one of my Moser 5 lug's out (got them through Re-speed many years ago) and get someone with accurate measuring tools and knowledge to spec them - and buy a spare set (again, if I had spare cash lol).

I'm not sure how often he comes on here anymore, but MustangHammer (check out his build thread if you haven't already, it's phenomenal) has had a set of Moser axles cut within the last few years, it's possible he has an invoice number you could use as a reference.

Edit: http://www.kcraceware.com/index.htm is another source you can try. I remember hearing of a few guys (maybe it was MustangHammer??) back in the day saying you could get the Moser axles through them. Website is still up and it has a phone number, might be worth a call...

Last edited by 82transam; Feb 24, 2017 at 02:02 PM.
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Old Feb 24, 2017 | 02:40 PM
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been doing some research on axles and diffs. i see user "peejay" has a lot of knowledge about rearends so maybe pm him and ask your question? seems like moser does more custom stuff and doesn't really share past customers' applications.
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Old Feb 25, 2017 | 06:53 PM
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I just bought axles from moser. They don't keep the re-speed specs. It is easy though, i sent them a stock axle and a brake rotor for the 5x114.3 swap i have, and asked for a reproduction of what i sent and to modify it to fit the new bolt pattern of the rotor i shipped as well. 3 weeks later and $400 i have 2 new axles that fit my GSL axle housing and diff, fit tii brakes and wheels. Call them, tell them what you want, and mail them the sample axle and brake rotor.

They were easy to work with and recommend them to anybody. They even pressed in studs for me so now i use wheel nuts instead of bolts.

Just to elaborate, i have taken the axles, pressed new bearings in, installed in the axle with new seals, and mounted some 5 lug mazda wheels, with my freshly rebuilt lsd and 4.44 ring and pinion, and filled with oil. Everything is solid and am very pleased with the result.

Also on the topic of what fails first, i cant answer that, but i did ship my lsd assembly to a heat treatment facility, cage, spider gears, clutch plates, and ring & pinion, had them all cryotreated. This should reduce the number of metal grain boundaries between austenite and martinsite leading to crack initiation sites or something like that. Anyway, all that and nothing warped and i got all the parts in spec per the manual when i reassembled.

Last edited by laundryhamperman; Feb 25, 2017 at 07:08 PM.
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Old Feb 26, 2017 | 12:48 PM
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That's the big problem, if I had sample axles in the first place I wouldn't be looking for other options.
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Old Feb 26, 2017 | 10:51 PM
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Originally Posted by 82transam
If using a Miata diff the axles would need to be shortened, so for your/our purposes no length changes would be made. Otherwise the numbers on that page should still be usable. I agree though, 2004 is an eternity in "internet years".

If I was not in the process of house shopping and had the time/spare cash to do so, I would pull one of my Moser 5 lug's out (got them through Re-speed many years ago) and get someone with accurate measuring tools and knowledge to spec them - and buy a spare set (again, if I had spare cash lol).

I'm not sure how often he comes on here anymore, but MustangHammer (check out his build thread if you haven't already, it's phenomenal) has had a set of Moser axles cut within the last few years, it's possible he has an invoice number you could use as a reference.

Edit: KC Raceware is another source you can try. I remember hearing of a few guys (maybe it was MustangHammer??) back in the day saying you could get the Moser axles through them. Website is still up and it has a phone number, might be worth a call...
The information on that miata torsen diff thing website is too vague for me to order using those invoice numbers without 100% knowing they are correct, if they would even make it for me.

No pressure on pulling those axles out, we can all understand the pressures of our daily lives.

I've messaged MustangHammer, (what a build thread, by the way). Maybe he will have some information, but his build thread mentions he ordered through RE-Speed. Who knows.
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Old Feb 27, 2017 | 03:27 AM
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I have a large and small bearing axle example lying around i could use to assist if you really need it. Both GS/GSL spec, I've read the -SE axles are a little longer to push the wheel out more, but are otherwise the same. I'm not sure if the -SE axle housing is longer either...
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Old Feb 27, 2017 | 12:54 PM
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mosler makes them, i bought a set last year. you gotta measure them yourselves though and give them the spec's. I actually sent them one side on mine. I believe the mentioned the axled was the same as a chevy 10 bolt rear end, the just shorthen it and change the grooves etc...
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Old Feb 27, 2017 | 11:39 PM
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No luck from MustangHammer.

laundryhamperman, the offer is definitely appreciated. However a local guy here also offered to take one of his long term project's axles out to do the same thing, so no worries about that. The SE axles are slightly longer or I could just send my GSL axles in and ask for the changed bolt pattern.

You wouldn't be willing to sell those SE axles would you?
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Old Feb 28, 2017 | 10:09 AM
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Originally Posted by sommmatt
No luck from MustangHammer.

laundryhamperman, the offer is definitely appreciated. However a local guy here also offered to take one of his long term project's axles out to do the same thing, so no worries about that. The SE axles are slightly longer or I could just send my GSL axles in and ask for the changed bolt pattern.

You wouldn't be willing to sell those SE axles would you?
one axles you can drill as it is larger diameter, the other you can't convert as it is smaller. I forget if it's GSL or SE or whatever, but the rear end with the 3.909 gear (mine) can't be drilled , and it is a different length as the one with the 4.1 gear ratio
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