Re: Trans speedo adapter for 69 yenko camaro
 

GM part number 3932220, which is a gear reduction of 1:0.75

Ring a bell for anyone? Seems like positraction had something to do with whether the adapter was used, although that really doesn't make sense.

Re: Trans speedo adapter for 69 yenko camaro
 

In the 69 Camaro AIM they show the reducer being used on positraction cars only.
There were three different numbers shown but I didn't write them down.
I believe the different part numbers were dependent on engine.
Should have brought the book home with me. :doh:

Re: Trans speedo adapter for 69 yenko camaro
 

Will have to look in the AIM tonight. In the meantime:

http://cgi.ebay.com/ebaymotors/Chevelle-...sQ5fAccessories

Re: Trans speedo adapter for 69 yenko camaro
 

I heard from another member that 2 of his L78 69 camaro's have this reducer - but his 69Z with 4:10's does not.

Re: Trans speedo adapter for 69 yenko camaro
 

I also understand that the speedo adapter was used for hipo cars with 4:10 gears but with 14 inch tires (like copo cars and L78 cars. If you had 15 inch tires then you did not have a need for the gear reducer. Makes sense from the point that i have not seen any 69Z with 4:10 have the reducer (which they have 15in YH's).

Not sure the correct application as of yet, but maybe others can chime in. Would the parts book show a specific application?

Re: Trans speedo adapter for 69 yenko camaro
 

I have a whole bunch of these if you need some !!!! Jim

If Jim or another member has a nice 3932220 speedo adapter for sale, please contact me, thanks.

I have one. Needs work as it appears it was dragged on the ground. Came off a real Yenko in early seventies. Sent a PM with pics.

This is a very old thread.........

Much thanks to John Brown for helping me find a 220 adapter.