Don,
The J type overdrive on my car came from an late 70s or early 80s volvo.
The tag on the passenger side reads 27 115951J05703. The 27 stands for 27%
overdrive.
I believe your overdrive may be a 22% overdrive.
>
> I have a Volvo J type OD with the following markings:
>
> On passenger's side: LM22 115240 13 SO (maybe SG?) 7427
> On driver's side: DTS 117930 LA4
>
> I understand the gear ratio % can be determined from the numbers on the
> OD case. Can anyone tell me where to look to determine the gear ratio %
> or do you know what it is? I understand it can be something like 25%,
> 27%, or 28% ?
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