Trans speedo adapter for 69 yenko camaro

[Lynn]

[ QUOTE ]
Question, so my 69 Z with a BV rear (4:10 ratio) would have this adapter as well?

I dont recall seeing it - i thought they changed the internal plastic gear for the correct speedo reading?

[/ QUOTE ]

Not necessarily. You would think that it would be uniform across the board. Can't remember the criteria for when a car got the adapter.

[resto4u]

you can buy them from speedometer repair guys. Bob's speedometer repair has a website. Roger

[al8apex]

Here is a source:



http://www.transmissioncenter.net/sp...atio%20adapter

the original stuff, sorry about the large pics:



or





as I stated above, they come in a LOT of different ratios ... good luck

[enio45]

Jim, excellent info - thank you for posting this.

Ill give them a call to see what they have avail.

Im still confused what triggers the use of them , especially if the 69Z's had 4:10 gears and M21 and no adapter used, vs the yenko cars had them and they run the same gears, tires and trans.

Maybe it was used if they went to TT wheels vs the standard YH wheels? Not sure if there was any diff - should not be thought???

[acelr8]

I believe the adapter to be a 90 degree not a straight through style as shown.The part number is 6476736 and heres to hoping you find two,as I need one as well.Jeff

[Lynn]

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.

[John Brown]

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: