WTB 42 tooth Speedo Driven gear for ZF6

[billscac]

Anyone know the part number or where I can find one?

 

[Hib Halverson]

No car equipped with a ZF S6-40 ever used a cable-driven speedometer.

When you say "ZF6" are you talking about the ZF S6-40 or some other transmission? If it is, in fact, a ZF S6-40, it must have been converted accept a driven gear and a cable.

Is that the case with your transmission?

 

[billscac]

No car equipped with a ZF S6-40 ever used a cable-driven speedometer.

When you say "ZF6" are you talking about the ZF S6-40 or some other transmission? If it is, in fact, a ZF S6-40, it must have been converted accept a driven gear and a cable.

Is that the case with your transmission?

My blue label ZF 6 speed manual trans does not have a cable driven speedo, you are correct However there is a 15 tooth speedo drive gear on the output shaft which turns a 42 tooth driven gear which mates to the VSS via a "D" shaped hole which mates with the "D" shaped stud on the sensor. The sensor converts rotation to electrical impulse which then runs to the PCM and eventually to the speedo. The Question was do you know where I can find the 42 tooth driven gear??

 

[Hib Halverson]

The only car sold in North America which used the S6-40 was the 89-96 Corvette. Only three axle ratios were available. A few 89s had 3.54s but all the rest had 3.45s or 3.33s You didn't mention what model year the ZF came from but it's probably out of a car with a 3.45 axle. If that comes with a 15-tooth gear, the trans used with 3.54 axle likely had one tooth difference or no difference. 3.33 might be two teeth.

Finding a 42 tooth gear from a Vette ain't gonna happen.

Now the S6-40 was used in two other vehicles in Europe. I have no idea what the axle ratio of those would be. You'd have to get in touch with someone who knows a lot about the ZF to find that out.

Search the web for the ZFdoc.

You also may need to look into some kind of adapter device to make it all work.

Good luck.

 

[billscac]

Way too much info!

The only car sold in North America which used the S6-40 was the 89-96 Corvette. Only three axle ratios were available. A few 89s had 3.54s but all the rest had 3.45s or 3.33s You didn't mention what model year the ZF came from but it's probably out of a car with a 3.45 axle. If that comes with a 15-tooth gear, the trans used with 3.54 axle likely had one tooth difference or no difference. 3.33 might be two teeth.

Finding a 42 tooth gear from a Vette ain't gonna happen.

Now the S6-40 was used in two other vehicles in Europe. I have no idea what the axle ratio of those would be. You'd have to get in touch with someone who knows a lot about the ZF to find that out.

Search the web for the ZFdoc.

You also may need to look into some kind of adapter device to make it all work.

Good luck.

HIB,
Thanks again for the answer to a question that I did not ask... Apparently you looked at my avatar and assumed that I was working with that car (the 62) and ignored the actual OP request for a specific part and went off on that tangent. FYI The trans is a blue label ZF6 in a 96 CE LT4. BTW it did happen...I got a 42 tooth driven gear for $15 from Rich at ZR1 specialist. Thanks again for all the info but I knew exactly what I wanted and was simply looking for a source.
Bill

 

[Hib Halverson]

HIB,
Thanks again for the answer to a question that I did not ask...

You are welcome. I attempted to help based on what I thought was not enough information. One problem I had is there is no such thing as a "ZF6". It's a "ZF S6-40", A "ZF six-speed", or "RPO MN6". ZF makes a multitude of six-speed transmissions all starting with S6-xxx. I've been working with S6-40s and C4s for 20 years and one problem has been people posting asking for info about transmissions and not knowing exactly what they have. Lacking model year info, you could have been trying to update a C4 with a Doug Nash in it, for all I knew.

Apparently you looked at my avatar and assumed that I was working with that car (the 62)

That is correct and I apologize for that. Given that you listed no model year, misidentified the transmission, had a pic of a C1 in your avatar and (coincidentally) I had experience adapting S6-40s to 1960s retromod applications, I jumped to the conclusion that you were trying to adapt a ZF six-speed to an older car. Again, I'm sorry. Sometimes myself and others trying to help people here on the CAC, do make assumptions.

and ignored the actual OP request for a specific part and went off on that tangent.

I didn't ignore it. I wasn't quite sure what you were asking for. Had you given that model year info in addition to incorrectly identifying it as a "ZF6" then maybe I wouldn't have wasted your time. You would found your part and blessed us with your departure.