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Author Topic: early vs late NA uprights
tyler raatz
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Region: atl
Car #: 10
Year : 95
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Can anyone tell me the difference between the 90-93 and 94-97 front and rear uprights (spindles).
I am building a new car out of parts from several donors. The tub is a '95, I think the rear uprights are from a '93, I have fronts from a '90 and a '93.
Can I use these parts, or do the not interchange?
Thanks
Tyler

SAE113 Verified Driver
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Region: Central Florida
Car #: 01 & 99
Year : '92 & '94
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i don't know about the rears but as far as the fronts the 90-93 are lighter than the 94-97. the 94-97 has a large bump on the side which was drilled for an abs sensor on cars that were so equipped

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Steven Elicati
'92 Protege ITA#01
'94 Miata ITA#99

tyler raatz
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Region: atl
Car #: 10
Year : 95
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Any more info out there, anyone??? [help]

Bad Al Bell Verified Driver Made Donation to Website Series Champ
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Region: WDC
Car #: 3
Year : 1991
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Fronts should be the same. ABS was available in 1993 so the bosses Steve mentions would be on those uprights.
I think all rears 90-97 are the same, but there are different size axles in the 94 up 1.8 cars and I believe there are different bearings for them.
if you have a 95 tub you need the 1.8 stuff.

--------------------
"Bad"Al Bell
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DW Verified Driver Made Donation to Website
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Rear hubs and bearings are the same for all, 1990-2000.
Front hubs and bearings are the same for all 1.8s.
Rear knuckles are the same for all NAs.

--------------------
Darrell Wheeler
-------------------
WBR Graphics
King RAT Motorsports
PBC Automotive
Meathead Racing

davew Verified Driver Made Donation to Website
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Region: chicago
Car #: 72 and ?
Year : 90 and 90
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FRONTS
90-93 non ABS are all the same
93 ABS is the same except, has the bump and drilled for sensor
94-97 are geometricly the same as the ABS cars except the holes are not drilled, unless ABS equiped
99+ are different than early cars, require the 99+ upper arm if installed on an early car.

Rears
90-97 cast uprights are the same geometry except for the ABS holes are drilled in ABS cars
99+ cast uprights give the additional 10mm of track width.
90-05 rear bearings are all the same.
90-93 rear hubs (the part with the studs) are all the same and use the small knurl lug studs.
94-05 rear hubs are the same as early cars but with the larger lug stud hole.

AXLES
90-93 2 piece design, only for use with small 1.6 diff
94-95 1.8l, 2 piece design, looks like 1.6 axles but are not interchangable
95-05 one piece design can be interchanged with the the 2 piece design
Mazdaspeed turbo cars use a larger inner spline. Requiring special axles. They also use a larger outer joint that requires the removal of the wheel bearing seal

Dave

--------------------
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spdmonkey Verified Driver Made Donation to Website
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Does Dave know his stuff or what?

db

davew Verified Driver Made Donation to Website
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By the way, you can not put 99+ uprights or the front upper control arms on an early car.

The SMAC tried that and got SMACked by the masses for even thinking about this.

--------------------
Advanced Autosports, The Midwests leader in Spec Miata Service, Parts and Rentals
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Gibscreen Verified Driver Series Champ
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Region: NASA-SoCal
Car #: 23
Year : 1995
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quote:
Originally posted by davew:
FRONTS
90-93 non ABS are all the same
93 ABS is the same except, has the bump and drilled for sensor
94-97 are geometricly the same as the ABS cars except the holes are not drilled, unless ABS equiped

Does this mean the 94-97 uprights are geometrically the same as the 90-93 uprights?

--------------------
Rob Gibson
RJ Racing
2010 NASA Nationals TTE Champion
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2007 NASA SoCal SM Champion
rjracing.net
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davew Verified Driver Made Donation to Website
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I did a poor job on the typing. Yes, the 90-97 uprights are all the same. The only difference is the ABS mounting tab.

Dave

--------------------
Advanced Autosports, The Midwests leader in Spec Miata Service, Parts and Rentals
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