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SlowGT · 09-09-2002, 10:36 AM

I put my first set in and they were FMS. They didn't come with any measurements. My current gears are Richmond and they came with the measurements marked right on the pinion.

You might want to rebuild the clutch pak while you're in there. A rebuild kit's only an extra $50.

Also, I've had 3 different shops that specialize in trannies and rearends recommend against synthetic gear oil. They claim that the Ford friction modifier doesn't blend as well with synthetic. I got that answere after I used Mobil 1 and ended up with the posi not acting right. Opened it up and gave it a good carb cleaner bath then filled it back up with Valvoline + friction modifier and it worked fine.

Just my $.02

09-09-2002, 10:36 AM	#6
SlowGT Registered Member Join Date: Jun 1999 Location: Columbia Co, PA Posts: 303	I put my first set in and they were FMS. They didn't come with any measurements. My current gears are Richmond and they came with the measurements marked right on the pinion. You might want to rebuild the clutch pak while you're in there. A rebuild kit's only an extra $50. Also, I've had 3 different shops that specialize in trannies and rearends recommend against synthetic gear oil. They claim that the Ford friction modifier doesn't blend as well with synthetic. I got that answere after I used Mobil 1 and ended up with the posi not acting right. Opened it up and gave it a good carb cleaner bath then filled it back up with Valvoline + friction modifier and it worked fine. Just my $.02 __________________ Old Slow GT New Slow GT--> under construction Latest Addition: 95 Cobra R, #73, bone stock, ~6100 miles.