The Crossfire came with two very different gearboxes: the NAG1 five-speed automatic (the 722.6) and a six-speed manual. This chapter gives each one its full factory treatment — gear ratios, the fluid it takes, and its own torque table.
The automatic’s section goes further, into the internal clearances a rebuilder works to: clutch pack clearances, end-play and the shim and snap-ring sizes that set them. If your interest stops at ratios and capacities, the first table of each section is all you need; the rest is there for the day a gearbox is open on a bench.
10. Transmission Specifications (Group 21)
NAG1 5-speed automatic (722.6)
Gear ratios:
| Gear | Ratio |
|---|---|
| 1st | 3.59:1 |
| 2nd | 2.19:1 |
| 3rd | 1.41:1 |
| 4th | 1.00:1 |
| 5th | 0.83:1 |
| Reverse | 3.16:1 |
Fluid: ATF approved to MB 236.10 / MB 236.12 — capacity 8.0 L (8.5 qts.) (see Section 2).
Internal specifications (selected):
| Component | Metric (mm) | Inch (in.) |
|---|---|---|
| Geartrain end-play | 0.3–0.5 | 0.012–0.020 |
| Geartrain end-play shims | 0.2, 0.3, 0.4, 0.5 | 0.008, 0.012, 0.016, 0.020 |
| Rear planetary gear set end-play | 0.15–0.6 | 0.006–0.024 |
| Rear planetary gear set snap-rings | 3.0, 3.4, 3.7 | 0.118, 0.134, 0.146 |
| B1 clutch clearance — 2 disc | 2.3–2.7 | 0.091–0.106 |
| B1 — 3 disc | 2.7–3.1 | 0.106–0.122 |
| B1 — 4 disc | 3.0–3.4 | 0.118–0.134 |
| B2 — 4 disc | 1.9–2.3 | 0.075–0.091 |
| B2 — 5 disc | 2.0–2.4 | 0.079–0.095 |
| B3 clutch clearance | 1.0–1.4 | 0.039–0.055 |
| K1 — 3 disc | 2.7–3.1 | 0.106–0.122 |
| K1 — 4 disc | 3.0–3.4 | 0.118–0.134 |
| K1 — 5 disc | 3.3–3.7 | 0.13–0.146 |
| K1 — 6 disc | 3.6–4.0 | 0.142–0.158 |
| K2 — 3 disc | 2.3–2.7 | 0.091–0.106 |
| K2 — 4 disc | 2.4–2.8 | 0.095–0.110 |
| K2 — 5 disc | 2.5–2.9 | 0.099–0.114 |
| K2 — 6 disc | 2.7–3.1 | 0.106–0.122 |
| K3 — 3 disc | 2.3–2.7 | 0.091–0.106 |
| K3 — 4 disc | 2.4–2.8 | 0.095–0.110 |
| K3 — 5 disc | 2.5–2.9 | 0.099–0.114 |
NAG1 torque specifications:
| Description | N·m | Ft. Lbs. | In. Lbs. |
|---|---|---|---|
| Bolt, B2 clutch carrier | 16 | — | 141 |
| Bolt, B1 carrier to converter housing | 10 | — | 88.5 |
| Nut, propeller flange | 120 | 88.5 | — |
| Bolt, electrohydraulic unit | 8 | — | 71 |
| Bolt, transmission housing to converter housing | 20 | — | 177 |
| Bolts, oil pan | 8 | — | 71 |
| Screws, valve body/housing side cover | 4 | — | 35 |
| Bolt, shift plate | 8 | — | 71 |
| Bolt, solenoid leaf spring | 8 | — | 71 |
| Plug, oil pan drain | 20 | — | 177 |
| Nut, shifter mechanism to floor pan | 7 | — | 65 |
Source: Group 21 — Specifications – NAG1 Automatic Transmission (PDF p.3334–3335)
6-speed manual transmission
Gear ratios:
| Gear | Ratio |
|---|---|
| 1st | 4.46 |
| 2nd | 2.61 |
| 3rd | 1.72 |
| 4th | 1.25 |
| 5th | 1.00 |
| 6th | 0.84 |
| Reverse | 4.06 |
Fluid: approved to MB 236.2 — capacity 1.8 L (1.9 qts.) (see Section 2).
Manual transmission torque specifications:
| Description | N·m | Ft. Lbs. | In. Lbs. |
|---|---|---|---|
| Backup lamp switch bolt | 8 | 6 | 71 |
| Camshaft position sensor (as listed) | 8 | 6 | 71 |
| Countershaft bolt | 90 | 66 | 797 |
| Front section to rear section bolts | 28 | 21 | 248 |
| Locking plate bolts | 9 | 7 | 80 |
| Oil drain plug | 60 | 44 | 531 |
| Oil fill plug | 50 | 37 | 443 |
| Pinion flange collared nut | 180 | 133 | 1593 |
| Rear crossmember bolts | 40 | 30 | 354 |
| Release bearing/slave cylinder bolts | 9 | 7 | 80 |
| Reverse idler shaft retaining bolt | 23 | 17 | 204 |
| Reverse lockout cable bracket bolts | 20 | 15 | 177 |
| Slave cylinder pressure line bolt | 10 | 7.3 | 89 |
| Transmission to engine bolts | 40 | 30 | 354 |
| Transmission ground bolt | 40 | 30 | 354 |
| Transmission mount bolts | 30 | 22 | 266 |
Source: Group 21 — Manual, Specifications – Gear Ratios / Torque / Fluid Capacity (PDF p.3433)