Posi Gear Ratio
#1
Posi Gear Ratio
I have a 64' f-85 with a 2.78 ratio in the rear end. I looked around for a posi unit that would fit this ratio and couldn't find one. I found auburn gear units that only fit 2.93 and up, nothing lower.
1. Does someone know where I could find a unit that fits 2.78?
2. Could someone explain what restricts me from using a 2.93 unit in my 2.78 rear end. Or, can I modify a 2.93 to work with my 2.78?
Thanks.
1. Does someone know where I could find a unit that fits 2.78?
2. Could someone explain what restricts me from using a 2.93 unit in my 2.78 rear end. Or, can I modify a 2.93 to work with my 2.78?
Thanks.
#2
2 series carrier
I have a 64' f-85 with a 2.78 ratio in the rear end. I looked around for a posi unit that would fit this ratio and couldn't find one. I found auburn gear units that only fit 2.93 and up, nothing lower.
1. Does someone know where I could find a unit that fits 2.78?
2. Could someone explain what restricts me from using a 2.93 unit in my 2.78 rear end. Or, can I modify a 2.93 to work with my 2.78?
Thanks.
1. Does someone know where I could find a unit that fits 2.78?
2. Could someone explain what restricts me from using a 2.93 unit in my 2.78 rear end. Or, can I modify a 2.93 to work with my 2.78?
Thanks.
NO AFTERMARKET 2 series posi units
2.) The carrier ring gear flange is to far to the passenger side to mount the ring and pinion with out the posi unit being too far to the driver side and then the axles will NOT engage the side gear correctly on the passenger side.
Info
2.56-2.78 2 series
2.93-3.23 3 series
3.36-4.33 4 series
Reference picture to see what makes the carriers 2 3 4 different
Jim
JD
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November 20th, 2019 09:11 PM