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Title: speedo gear replacement
Post by: mcb82gt on February 12, 2009, 08:37:38 AM

Ive got the full digital cluster and AOD tranny.

Eventually I will swap gears in the reareand, is there anything special with the getting speedo gear swapped to make it read correctly with the digital dash? Ive only done it on 5spd cars buttstuffog dashes.

Title: speedo gear replacement
Post by: CatCarMan2012 on February 12, 2009, 09:45:52 AM

Disconnect Plug, Remove bolt, Pull sender, Remove Pin, Swap Gear, then reinstall Pin, Sender, Bolt, and Plug.

I know that some AODs have different # of teeth on the output shaft, that would be the only thing to look out for I think.

http://www.sccoa.com/faq/speedgr.html

Title: speedo gear replacement
Post by: mcb82gt on February 12, 2009, 09:53:39 PM

So if I find the donor Cougar with 3.27, I should take the gear with the ring and pinion.

I think I read, not sure of year, some AOD V6 with the 7.5 rear, could have 3.27.

Any input?

Title: speedo gear replacement
Post by: CatCarMan2012 on February 13, 2009, 10:01:48 AM

For an 8.8:
327s can be had from AOD Supercoupes.
308s from V8 MN12 Birds

For a 7.5:
I think the 273 was the most common in the fox.
http://www.coolcats.net/tech/general/axleinfo.html
Rangers and Aerostars also go 7.5s and would probably have steeper gears. Check the Tag.

My 273s with my T5 has some punch. But i haven't had it on the freeway yet.

Title: speedo gear replacement
Post by: Kitz Kat on February 13, 2009, 03:57:55 PM

What do you have now 7.5 or 8.8?

Title: speedo gear replacement
Post by: mcb82gt on February 17, 2009, 08:37:27 AM

Sorry, I got the 7.5, and plan on keeping it in there.

Title: speedo gear replacement
Post by: TurboCoupe50 on February 17, 2009, 04:48:47 PM

Get you some 3:73s from a Aerostar...

Title: speedo gear replacement
Post by: mcb82gt on February 17, 2009, 06:34:28 PM

Is there a trac-loc from a junkyard vehicle that will swap in?

Title: speedo gear replacement
Post by: Kitz Kat on February 17, 2009, 07:43:20 PM

Sure is.

Title: speedo gear replacement
Post by: mcb82gt on February 18, 2009, 08:04:23 AM

Ok, i'll play along.

My I inquire as to what vehicles it may be?

Year make model engine tranny etc.

Title: speedo gear replacement
Post by: Kitz Kat on February 18, 2009, 02:53:18 PM

Try here theirs a few listed.
http://motors.search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&mppfqy=thunderbird&mppfqy=thunderbird&fccl=1&fcl=3&catref=C6&from=R2&frpp=50&satitle=ford+7.5&sacat=33731%26catref%3DC6&fmmk=&fmmd=&fylo=&fyhi=&mppfqy=mustang&sargn=-1%26saslc%3D2&sadis=200&fpos=18018&sabfmts=1&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=1%26fsoo%3D1&coaction=compare&copagenum=1&coentrypage=search&fgtp=

Or look for older rangers or even fox birds and cats.It would be hit and miss till you find one.

Title: speedo gear replacement
Post by: thunderjet302 on February 18, 2009, 04:23:24 PM

If you run a 3.73 with your stock AOD (8 tooth drive gear) you need a 23 tooth driven gear to make the speedo correct. Mustangs Unlimited sells one for automatic transmission cars.

Title: speedo gear replacement
Post by: mcb82gt on February 19, 2009, 07:55:38 AM

Thanks guys.

Title: speedo gear replacement
Post by: Kitz Kat on February 19, 2009, 02:41:10 PM

If your real serious as to what you want I do have a 345 trac loc 7.5 rear .
thats not doin me any good.

Title: speedo gear replacement
Post by: CatCarMan2012 on February 26, 2009, 10:23:25 AM

I went to the local PnP this weekend. I found no less than 5 Aerostars with 373s and at least 1 was a locker.

Fox T-Bird/Cougar Forums

Technical => Drivetrain Tech => Topic started by: mcb82gt on February 12, 2009, 08:37:38 AM