Alright I've searched and searched and called many places but I cannot find a place to get the 40/15 gear combo for my speedo on my 92 z28. If anyone could help me I would be very thankful.

 

you might need to get a dakota digital sgi-5

 

http://www.transmissioncenter.net/sp...n_______va.htm

 

Looked on there shows they are out of stock. :/

 

I tried for months to find the right gears, finally gave up and got the "Ratio Adapter" from the transmission center link above. Not sure if it will work on a non-cable driven car, but I could not be happier. Took about 4 minutes to install, and works perfectly. I went from 2.73 to 3.42, so I needed a special-order 21%. According to my GPS, I am dead-on. I think it was about $80 shipped, but it took about 2 months to arrive.

 

Seem OK to me... I can put em in a "shopping cart"... they're OOS on 208 gears right below, and the used high-ratio housings right above.

Might be worthwhile to give em a call; or, to find other gears with a ratio as close as practical to 40/15. After all, it's a "measure with micrometer, mark with chalk, cut with axe" kind of thing; the difference in tire diameter due to pressure change from cold to hot, or the effect of tread wear, will have as much IF NOT MORE effect on speedo accuracy as one whole tooth on the driven gear (2½%).

 

Tried to call they were closed already will try again tomorrow. I also am going from 2.73 to 3.42s. Hate to put a ton of money into it since a 5.3/4l60e swap it in the near future but I also want my speed and odometer right for the time being. Originally was gona order the parts from gmpartsdirect found them went through ordering process and for two $4.50 parts they tried to charge me $400 shipping lol. I emailed them twice and no reply yet. Talked to the Flow dealership and they said it pretty much has to be a misprint.

 

Back in April you could put them in your cart too. Unfortunately when the delivery comes, it will only have the 15 tooth drive gear and a refund for the driven gear. Maybe it's back in stock. Maybe not.

 

Mines ot the electronic speedo do the driven gear is a little diff than the cable speedos

 

finaly got the gears!! the 15 tooth gear came from TCI trough summit racing the 40 tooth gear summit found for me and had it drop shipped to me and turns out its a acdelco part go figure. ill post part numbers and a picture.

TCI-880018 gray gear 15 tooth and acf-25513047 for the 40 tooth. i know the package says diffrent but thats the pn summt gave me. you have to call them and get them to look it up. it was not in the system they put it in after i called them but seems like i can still not look it up so if you need it call them. hope this helps someone.

 

I know you found what your looking for but if anyone else is looking for a good place I bought mine at:

http://www.vpartsinc.com/