Showing specs for all NA & NB Miatas

PPF / differential removal

Driveshaft flanges, differential mounts and PPF hardware. Follow each cited PPF sequence and height check.

Use this checklist to track fasteners you handle. It is not a complete repair procedure or a verified disassembly order. Follow your factory manual for access, support, tightening sequences and inspections. Select your car and check each variant before using a value.

Checklist: https://miatatorque.com/jobs/ppf-differential/
All NA & NB variants; select your car to narrow the list.

You’ll replace

No replacement list is recorded in these specs. Check the cited procedures for seals, gaskets and single-use hardware.

Fluids & settings

Fluid types, capacities and settings have not been catalogued for this job. Check your factory manual before filling or adjusting.

1. Driveshaft connections

Propeller shaft (driveshaft) to differential flange bolts
NA 1990–1993
Factory manual20–22 ft·lb27–30 N·m27–30 N·m20–22 ft·lb
Notes
Align the marks before installing.
  • 1990 Mazda MX-5 Miata Workshop Manual — Page L–4Printed: “27—30 N·m (2.8—3.1 m-kg, 20—22 ft-lb)”
Propeller shaft (driveshaft) to differential flange bolts (1994 on)
NA 1994–1997; NB 1999–2000
Factory manual37–43 ft·lb50–58 N·m50–58 N·m37–43 ft·lb
  • 1994 Mazda MX-5 Miata Workshop Manual — Page L–4Printed: “50–58 N·m (5.0–6.0 kgf·m, 37–43 ft·lbf)”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 03–15–1Printed: “50—58 {5.0—6.0, 37—43}”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 03–15–2Printed: “50—58 N·m {5.0—6.0 kgf·m, 37—43 ft·lbf}”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 05–11–4Printed: “49–58 {5.0–6.0, 37–43}”
Propeller shaft (driveshaft) to differential flange fasteners (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual37–43 ft·lb49–59 N·m49–59 N·m37–43 ft·lb
Notes
Align the matching marks before installation.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1209Printed: “49—59 N·m {5.0—6.0 kgf·m, 37—43 ft·lbf}”
Driveshaft (half shaft) to differential flange bolts
NA 1990–1997
Factory manual40–47 ft·lb54–64 N·m54–64 N·m40–47 ft·lb
Notes
Align the marks before installing.
  • 1990 Mazda MX-5 Miata Workshop Manual — Page M–17Printed: “54—64 N·m (5.5—6.5 m-kg, 40—47 ft-lb)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page M–18Printed: “54–64 N·m (5.5–6.5 kgf·m, 40–47 ft·lbf)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page M–26Printed: “54–64 N·m (5.5–6.5 kgf·m, 40–47 ft·lbf)”

2. Differential mounts

Differential rear mount bolts
NA 1994–1997; NB 1999–2000; NA 1990–1993 (B6)
Factory manual61–72 ft·lb83–98 N·m83–98 N·m61–72 ft·lb
  • 1990 Mazda MX-5 Miata Workshop Manual — Page M–30Printed: “83—98 N·m (8.5—10 m-kg, 61—72 ft-lb)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page M–30Printed: “A: 83–98 N·m (8.5–10 kgf·m, 61–72 ft·lbf)”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 03–14–3Printed: “84—98 {8.5—10.0, 62—72}”
Differential mounting nuts (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual62–72 ft·lb83.4–98 N·m83.4–98 N·m62–72 ft·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1180Printed: “83.4—98.0 {8.5—10.0, 61.5—72.3} N·m {kgf·m, ft·lbf}”

3. Power plant frame

Power plant frame (PPF) bolts
NA 1990–1997; NB 1999–2000
Factory manual77–91 ft·lb104–123 N·m104–123 N·m77–91 ft·lb
Sequence
1) Differential mounting spacer 37–52 N·m (27–38 ft·lb). 2) Support the transmission level, fit the PPF and snug the transmission-side bolts by hand (reamer bolt in the forward hole; check the sleeve is in the block). 3) Snug the spacer, bolts and PPF bracket. 4) Torque the transmission-side bolts. 5) Torque the differential-side bolts.
Notes
The order matters: torquing the PPF in the wrong order preloads the drivetrain.
  • 1990 Mazda MX-5 Miata Workshop Manual — Page J–46Printed: “104—123 N·m (10.6—12.6 m-kg, 77—91 ft-lb)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page J–46Printed: “104–123 N·m (10.6–12.6 kgf·m, 76.7–91.1 ft·lbf)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page M–30Printed: “104–123 N·m (10.6–12.6 kgf·m, 77–91 ft·lbf)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page M–31Printed: “104–123 N·m (10.6–12.6 kgf·m, 77–91 ft·lbf)”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 03–14–3Printed: “(a): 104—123 {10.6—12.6, 77—91}”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 05–11–6Printed: “104–123 N·m {10.6–12.6 kgf·m, 76.7–91.1 ft·lbf}”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 05–13–22Printed: “104–123 N·m {10.6–12.6 kgf·m, 77–91 ft·lbf}”
PPF bracket bolts B (small)
NA 1994–1997; NB 1999–2000; NA 1990–1993 (B6)
Factory manual27–39 ft·lb37–53 N·m37–53 N·m27–39 ft·lb
  • 1990 Mazda MX-5 Miata Workshop Manual — Page J–45Printed: “36—54 (3.7—5.5, 27—40)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page J–47Printed: “B: 37–53 N·m (3.7–5.5 kgf·m, 27–39 ft·lbf)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page M–31Printed: “B: 36–54 N·m (3.7–5.5 kgf·m, 27–40 ft·lbf)”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 05–11–6Printed: “B: 37–53 N·m {3.7–5.5 kgf·m, 27–39 ft·lbf}”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 03–14–3Printed: “(b): 36—53 {3.7—5.5, 27—39}”
Differential mounting spacer (PPF end)
NA 1994–1997; NB 1999–2000; NA 1990–1993 (B6)
Factory manual28–38 ft·lb38–51 N·m38–51 N·m28–38 ft·lb
  • 1990 Mazda MX-5 Miata Workshop Manual — Page M–30Printed: “37—52 N·m (3.8—5.3 m-kg, 27—38 ft-lb)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page J–46Printed: “38–51 N·m (3.8–5.3 kgf·m, 28–38 ft·lbf)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page M–30Printed: “37–52 N·m (3.8–5.3 kgf·m, 27–38 ft·lbf)”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 05–11–5Printed: “38—51 {3.8—5.3, 28—38}”
Automatic transmission power plant frame main bolts (NB2)
NB 2001–2005 (BP-Z3, 4AT)
Factory manual77–91 ft·lb104–123 N·m104–123 N·m77–91 ft·lb
Notes
Tighten in the illustrated order and verify PPF height.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1564Printed: “104—123 N·m {10.6—12.6 kgf·m, 77—91 ft·lbf}”
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1563Printed: “104—123 N·m {10.6—12.6 kgf·m, 77—91 ft·lbf}”
Wiring harness bracket bolts on power plant frame (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual14–18 ft·lb19–25 N·m19–25 N·m14–18 ft·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1180Printed: “19—25 {2.0—2.5, 14—18} N·m {kgf·m, ft·lbf}”
Differential mounting spacer bolts (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual≈28–38 ft·lb38–51 N·m38–51 N·m≈28–38 ft·lb
Notes
Source prints ft·m; this malformed unit is preserved in the quotation and omitted from structured units. Use printed N·m; inconsistent secondary units do not change the factory N·m value.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1521Printed: “38—51 N·m {3.8—5.3 kgf·m, 28—38 ft·lbf}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1184Printed: “38—51N·m {3.8—5.3 kgf·m, 28—38 ft·m}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
Power plant frame main bolts (NB2)
NB 2001–2005 (BP-Z3, 5MT/6MT); NB 2004–2005 (BP-Z3-TURBO, 6MT)
Factory manual≈77–91 ft·lb104–123 N·m104–123 N·m≈77–91 ft·lb
Notes
Install sleeve and spacers, then tighten in the illustrated order. Verify PPF height after installation. Source prints ft·m; this malformed unit is preserved in the quotation and omitted from structured units. Use printed N·m; inconsistent secondary units do not change the factory N·m value.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1522Printed: “104—123 N·m {10.6—12.6 kgf·m, 76.7—91.1 ft·lbf}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1185Printed: “104—123 N·m {10.6—12.6 kgf·m, 76.7—91.1 ft·m}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
Power plant frame bracket bolt B (NB2)
NB 2001–2005 (BP-Z3, 5MT/6MT); NB 2004–2005 (BP-Z3-TURBO, 6MT)
Factory manual≈27–39 ft·lb37–53 N·m37–53 N·m≈27–39 ft·lb
Notes
Source prints ft·m; this malformed unit is preserved in the quotation and omitted from structured units. Use printed N·m; inconsistent secondary units do not change the factory N·m value.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1523Printed: “37—53 N·m {3.7—5.5 kgf·m, 27—39 ft·lbf}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1185Printed: “37—53 N·m {3.7—5.5 kgf·m, 27—39 ft·m}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
Power plant frame bracket bolt A (NB2)
NB 2001–2005 (BP-Z3, 5MT/6MT); NB 2004–2005 (BP-Z3-TURBO, 6MT)
Factory manual≈77–91 ft·lb104–123 N·m104–123 N·m≈77–91 ft·lb
Notes
Source prints ft·m; this malformed unit is preserved in the quotation and omitted from structured units. Use printed N·m; inconsistent secondary units do not change the factory N·m value.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 1185Printed: “104—123 N·m {10.6—12.6 kgf·m, 76.7—91.1 ft·m}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.

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