Difference between revisions of "Gearbox"
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| − | The E30 was available | + | The E30 was available as both a Manual and an Automatic. In total, seven different gearboxes were fitted to the E30; four manuals, all produced by Getrag, and three automatics by ZF. |
| + | |||
| + | The gearbox, prop-shaft and [[Differential]] make up the [[Transmission]], and gearbox ratios are also dependent on the ratio of your diff. For example, a high ratio diff (4.27) combined with a high-ratio first gear (3.72) will make first gear useless. In contrast, a low-ratio diff (3.25) with a low-ratio gearbox (2.48 in first) | ||
=Gearboxes= | =Gearboxes= | ||
| + | |||
| + | '''Transmission gear ratios:''' | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- style="text-align:center;"| | ||
| + | ! | ||
| + | ! '''4-speed manual''' | ||
| + | ! colspan="3" | '''5-speed manual''' | ||
| + | ! '''3-speed automatic''' | ||
| + | ! colspan="2" | '''4-speed automatic''' | ||
| + | |- style="text-align:center;"| | ||
| + | | '''available on''' | ||
| + | | '''316, 318i''' | ||
| + | | '''316, 316i, 318i, 320i''' | ||
| + | | '''323i standard, 325i''' | ||
| + | | '''323i sports''' | ||
| + | | '''316, 318i''' | ||
| + | | '''320i, 323i''' | ||
| + | | '''325i''' | ||
| + | |- style="text-align:center;"| | ||
| + | | '''1st''' | ||
| + | | 3.76 | ||
| + | | 3.72 | ||
| + | | 3.83 | ||
| + | | 3.76 | ||
| + | | 2.48 | ||
| + | | 2.73 | ||
| + | | 2.48 | ||
| + | |- style="text-align:center;"| | ||
| + | | '''2nd''' | ||
| + | | 2.04 | ||
| + | | 2.02 | ||
| + | | 2.20 | ||
| + | | 2.33 | ||
| + | | 1.48 | ||
| + | | 1.56 | ||
| + | | 1.48 | ||
| + | |- style="text-align:center;"| | ||
| + | | '''3rd''' | ||
| + | | 1.32 | ||
| + | | 1.32 | ||
| + | | 1.40 | ||
| + | | 1.61 | ||
| + | | 1.00 | ||
| + | | 1.00 | ||
| + | | 1.00 | ||
| + | |- style="text-align:center;"| | ||
| + | | '''4th''' | ||
| + | | 1.00 | ||
| + | | 1.00 | ||
| + | | 1.00 | ||
| + | | 1.23 | ||
| + | | - | ||
| + | | 0.73 | ||
| + | | 0.73 | ||
| + | |- style="text-align:center;"| | ||
| + | | '''5th''' | ||
| + | | - | ||
| + | | 0.81 | ||
| + | | 0.81 | ||
| + | | 1.00 | ||
| + | | - | ||
| + | | - | ||
| + | | - | ||
| + | |- style="text-align:center;"| | ||
| + | | '''reverse''' | ||
| + | | 4.10 | ||
| + | | 3.45 | ||
| + | | 3.46 | ||
| + | | 4.10 | ||
| + | | 2.09 | ||
| + | | 2.09 | ||
| + | | 2.09 | ||
| + | |} | ||
| + | |||
==Manual Gearboxes== | ==Manual Gearboxes== | ||
| Line 14: | Line 91: | ||
=Upgrades= | =Upgrades= | ||
| + | |||
| + | ==Compatibilities== | ||
| + | |||
| + | When upgrading the [[Engines|engine]] of your E30, you should also consider what effect this will have on the gearbox. When changing your [[M20B20]] to [[M20B25]], the gearbox is compatible, with the Getrag 240 gearbox of the former engine having similar ratios to the Getrag 260 Sports gearbox available for the latter. However, the 240 isn't as strong a unit, and may break prematurely. | ||
A [[Z3_short_shifter_conversion|Z3 short shift conversion]] will help you change gears quicker. | A [[Z3_short_shifter_conversion|Z3 short shift conversion]] will help you change gears quicker. | ||
Revision as of 08:13, 26 September 2011
The E30 was available as both a Manual and an Automatic. In total, seven different gearboxes were fitted to the E30; four manuals, all produced by Getrag, and three automatics by ZF.
The gearbox, prop-shaft and Differential make up the Transmission, and gearbox ratios are also dependent on the ratio of your diff. For example, a high ratio diff (4.27) combined with a high-ratio first gear (3.72) will make first gear useless. In contrast, a low-ratio diff (3.25) with a low-ratio gearbox (2.48 in first)
Contents
Gearboxes
Transmission gear ratios:
| 4-speed manual | 5-speed manual | 3-speed automatic | 4-speed automatic | ||||
|---|---|---|---|---|---|---|---|
| available on | 316, 318i | 316, 316i, 318i, 320i | 323i standard, 325i | 323i sports | 316, 318i | 320i, 323i | 325i |
| 1st | 3.76 | 3.72 | 3.83 | 3.76 | 2.48 | 2.73 | 2.48 |
| 2nd | 2.04 | 2.02 | 2.20 | 2.33 | 1.48 | 1.56 | 1.48 |
| 3rd | 1.32 | 1.32 | 1.40 | 1.61 | 1.00 | 1.00 | 1.00 |
| 4th | 1.00 | 1.00 | 1.00 | 1.23 | - | 0.73 | 0.73 |
| 5th | - | 0.81 | 0.81 | 1.00 | - | - | - |
| reverse | 4.10 | 3.45 | 3.46 | 4.10 | 2.09 | 2.09 | 2.09 |
Manual Gearboxes
All manual gearboxes were 5-speed with floor-mounted shifters.
Clutch
Automatic Gearboxes
Maintenance
Upgrades
Compatibilities
When upgrading the engine of your E30, you should also consider what effect this will have on the gearbox. When changing your M20B20 to M20B25, the gearbox is compatible, with the Getrag 240 gearbox of the former engine having similar ratios to the Getrag 260 Sports gearbox available for the latter. However, the 240 isn't as strong a unit, and may break prematurely.
A Z3 short shift conversion will help you change gears quicker.
