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Getrag Transmission Gear Ratios- 240 a bad transmission??


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I found this on the Bimmer Forum. Spent about 30min looking here. Couldn't find it.

Now I need to know why the 240 is not a good transmission, any help?

Getrag Transmissions.

The 1977-79 E21 320i uses the Getrag 242 (4-speed).

The 1980-82 320i(s) uses the Getrag 245 (5-speed).

The 1983 E21 320i(s) uses the same Getrag 240 (5-speed) as the 1984 E30 318i(s).

4-speed - 320i - Getrag 242

Gear ratios

1st - 3.764

2nd - 2.02

3rd - 1.32

4th - 1.00

5-speed - 320i - Getrag 245/4 Overdrive transmission ’80 – ‘82

Gear ratios

1st - 3.764

2nd - 2.00

3rd - 1.33

4th - 1.00

5th - 0.81

5-speed - 320i - Getrag 245/10 close ratio/”dogleg”

Gear ratios

1st - 3.764

2nd - 2.325

3rd - 1.612

4th - 1.229

5th - 1.000

5-speed - 320i - Getrag 240

Gear ratios - almost the same as a 245/4

Transmission Weights:

Getrag 242 - 48 lbs

Getrag 245 - 63 lbs

Getrag 240 - 62 lbs

Both input shaft diameter for the pilot bearing .471”/11.9634mm

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The Getrag 240 transmission came with aluminum shift forks, which were not as durable as the steel forks in the 245. Aparently this caused some 240 failures. If I recall there are some members here with 240 transmissions in thier racecars, as they are lighter and shorter than the 245.

I have a 240 from a '83 320i that I will be installing soon. Others have installed 240 transmissions as well so Im sure they will chime in.

Edit: If you get a 240 get one from a 320i. The E30 240's have 2 mounting tabs and do not have the speedometer cable hookup.

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Thanks MAD02 I really appreciate it. I like the lighter and shorter idea. I had great luck with a T10 on a raging small block even though all the old timers said it wouldn't work.

I think it has more to do with the left foot than the strength of the transmission.

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  • 5 years later...
On 7/7/2012 at 9:03 PM, MAD02 said:

The Getrag 240 transmission came with aluminum shift forks, which were not as durable as the steel forks in the 245. Aparently this caused some 240 failures. If I recall there are some members here with 240 transmissions in thier racecars, as they are lighter and shorter than the 245.

I have a 240 from a '83 320i that I will be installing soon. Others have installed 240 transmissions as well so Im sure they will chime in.

Edit: If you get a 240 get one from a 320i. The E30 240's have 2 mounting tabs and do not have the speedometer cable hookup.

Did you install the 240 and so you have a guide or Photos?

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