speedo reduction box

**Alss** · #1 12-18-2005, 05:43 PM

Did the COPO Chevelles use these??

http://cgi.ebay.com/ebaymotors/ws/eBayIS...A%3AIT&rd=1

If so I need to get one...part # ??? Thanks

ALbert

bertfam · #2 12-18-2005, 09:26 PM

Albert,

Read THESE THREADS. It'll 'splain everything.

Ed

**Alss** · #3 12-22-2005, 01:55 AM

Ed, thanks for the link..OK, I have read the threads and guess I need this one??

4.10 Rear Axle, 7.35x14 or F70-14 Tires, 8 tooth Drive Gear (P/N 3924098), 20 tooth Driven Gear (P/N 3860343), 3 Speed (exec O/D), HD 3 Speed, Powerglide or 4 Speed Transmission. Adapter P/N 6476736.

Did I choose wisely??

Merry CHristmas everyone

ALbert

bertfam · #4 12-22-2005, 02:21 AM

Albert.

Well, almost. You have a 69 Chevelle and it's a bit different on a few ratios than the Camaro! For a 4.10 rear end with F70x14 tires and a 3 or 4 speed manual transmission, you'll need the following:

3924098 8 tooth drive gear
3860342 19 tooth driven gear (neutral color)
3932220 Adapter

I didn't see your reference to the COPO Chevelle above. Sorry about that!

And by the way, GM didn't use a Stewart Warner reducer. That's an aftermarket item.

Ed

**Bill Rose** · #5 12-22-2005, 03:50 AM

What do you need a speedometer for anyway, to see how fast your going up the trailer ramp??

**Alss** · #6 12-22-2005, 04:11 AM

Thanks Ed..my search begins.

and as for you Mr. Rose...just want to see what my trap speeds will be

ALbert

**YENKO DEUCE REGISTRY** · #7 12-22-2005, 04:57 PM

Thanks Jeff, those are the pieces that I have - so I guess I'm not missing any. I'll have to recheck it - again.

Mr.Rose - get your hiney to a SCR, you'll see why we need speedo's

**Mr70** · #8 12-23-2005, 09:20 PM

And by the way, GM didn't use a Stewart Warner reducer. That's an aftermarket item.

Ed..I've never seen anything but a Stewart Warner brand used on the Ass.line for this item.Both on survivor vehicles and in the manuals.
Can you show paper or pix to contradict this?

camarojoe · #9 12-23-2005, 10:16 PM

I have several that only have an AC logo on them with no SW wording. They are the 90 degree type.

**SS427** · #10 12-23-2005, 10:59 PM

Only speaking of the 4:10 equipped Chevelles, the Stewart Warner gear is the only one I have ever seen on all the original cars as well. On a side note, I recently had a neighbor ask for help taking a 305 and Turbo 350 out of a 80's something Buick wagon and that also had this exact same reducer on it.

Rick

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.