rear end ratio
 

I recently changed the rear in my 99 Cobra from the stock 3.27 to a 3.73 ratio. How do I recalibrate the speedometer. The mechanic said the speedo uses a magnetic pickup and not a toothed gear at the transmission. Reprogram the computer???

Not being a late model Stang owner, I think you have to get an add-on or programable chip to fix that. Those in the modular forum probably will know.

Rev

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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.

[This message has been edited by Rev (edited 09-18-2001).]

I'm looking at the Saleen powerflash ECM, supposed to be programed to match your gear ratio and add extra HP across the board.


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'95 Chrome Yellow GT ragtop, KN filter charger, Dynomax cat back, Accel plugs and wires, Chromed '95 Cobra R's (bought for $19.95, now 2 are warped!).
http://www.mustangworks.com/cgi-bin/moi-display.cgi?1883

Moved to Windsor Power

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SVO siamesed 351 stroked to 417ci,Yates heads, solid roller,Trans King glide and a little blue bottle
of giggle gas. My Car