3 transmission variants are listed for the 1999 Pontiac Firebird. Compare attributes, check the tag on your unit, and find the one that fits.
More than one variant is listed. Please verify the tag on your unit before ordering. A VIN shows the part your vehicle was built with, but if it has been replaced, the tag on the unit in your vehicle may be different, and the tag on your unit is what determines fitment.
The attributes below differ between variants. Find the matching value on your unit's tag or in your vehicle's records.
M49 Manual Transmission Assembly
| Brackets Included | No |
|---|---|
| California Proposition 65 | WARNING: Cancer and Reproductive Harm |
| Fluid Type | ATF |
| Gaskets Included | No |
| Output Type | RWD |
| Shifter Included | No |
| Switches Included | No |
| Transmission Family | M49 |
| Transmission Speeds | 5-Speed |
None listed.
4L60E Automatic Transmission Assembly
| Average R&R | 5.2 |
|---|---|
| Bell Housing | Removable S-10 Type |
| Bell Housing Included | Yes |
| Case Type | 2 Piece |
| Connector Type | Gray with 13 Pins |
| Converter Mount/Diameter | 245 MM |
| Cooler Included | No |
| Cooler Lines | Steel |
| Cooler Replacement Required | No |
| Extended Warranty | No |
| Fluid Type | PZL-LVMULTI |
| Lockup | Yes |
| Output Type | 2WD 4-1/2 Inch Splines |
| Pan Bolts | 16 |
| Premium Labor | Yes |
| ProductVideoURL | https://etereman.wistia.com/medias/1yp726bfjx |
| Radiator Included | No |
| Radiator Replacement Required | No |
| Shift Type | 3/4 Inch Manual Shift Shaft Size |
| Tail Housing | With |
| Torque Converter Included | Yes |
| Transmission Family | 4L60E |
| Transmission Fluid | 11 |
| Transmission Speeds | 4-Speed |
None listed.
4L60E Automatic Transmission Assembly
| Average R&R | 5.2 |
|---|---|
| Bell Housing | 1 Bolt Hole at 12 O'clock Position on Bell |
| Bell Housing Included | Yes |
| Case Type | 2 Piece |
| Connector Type | Gray with 13 Pins |
| Converter Mount/Diameter | 300 MM |
| Cooler Included | No |
| Cooler Lines | Steel |
| Cooler Replacement Required | No |
| Extended Warranty | No |
| Fluid Type | PZL-LVMULTI |
| Lockup | Yes |
| Neutral Safety Switch | With Bosses |
| Output Type | 2WD 4-1/2 Inch Splines |
| Pan Bolts | 16 |
| Premium Labor | Yes |
| ProductVideoURL | https://etereman.wistia.com/medias/1yp726bfjx |
| Radiator Included | No |
| Radiator Replacement Required | No |
| Shift Type | 3/4 Inch Manual Shift Shaft Size |
| Tail Housing | With |
| Torque Converter Included | Yes |
| Transmission Family | 4L60E |
| Transmission Fluid | 11 |
| Transmission Speeds | 4-Speed |
None listed.
3 variants are listed: M150110, T260142, T260164. Which one fits depends on the tag on your unit.
Check the tag on your unit before ordering. Please verify the tag on your unit before ordering. A VIN shows the part your vehicle was built with, but if it has been replaced, the tag on the unit in your vehicle may be different, and the tag on your unit is what determines fitment.
The attributes that differ between variants are: Bell Housing, Converter Mount/Diameter, Fluid Type, Output Type, Transmission Family, Transmission Speeds.
Fitment data from the ETE catalog, our own completed orders, and Hollander interchange data. Numbering systems are listed separately and never merged. When a record lists more than one variant, the tag on your unit is the final word on fitment.