Standard Gear Ratio For 61 88

Old October 19th, 2018, 06:11 AM
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Standard Gear Ratio For 61 88

What would have been the standard gear ratio for 1961 88
Thanks
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Old October 19th, 2018, 06:38 AM
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The "standard" ratio for Hydra-Matic was 2.87 . However there were a lot of options available , including different ratios for A/C cars .
The picture at the bottom left shows where to find the axle codes and their meaning .





Last edited by Charlie Jones; October 19th, 2018 at 06:44 AM.
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Old October 23rd, 2018, 06:11 AM
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Just curious because I am installing a Fabcraft posi unit and when I removed the differential I noticed it was a 2:87 ratio. Nice hiway gears wich works for me.
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Old October 23rd, 2018, 11:00 PM
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Originally Posted by KQQLCAT View Post
Just curious because I am installing a Fabcraft posi unit and when I removed the differential I noticed it was a 2:87 ratio. Nice hiway gears wich works for me.
Hey KQQLCAT i was interested in the same thing. Any tips or tricks with the 9.3? Did you buy the book? I've assembled 12 bolt Chevy's and Dana 60's before haven't ever done a drop out style probably a little easier to work on.

John
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Old October 24th, 2018, 07:17 AM
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No tricks pretty much straight forward, removed driveshaft, axles, and removed pumpkin and cleaned out the housing. Now I installed new axle bearings, seals and bought new bearings for carrier. I am having a friend put the posi in and set up because I want someone who does this regularly. I did get the book it has lots of useful information in there.
Fabcraft are great people.

Last edited by KQQLCAT; October 24th, 2018 at 07:20 AM.
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