well ... this is probably a dumb question .. but it's been some time since i "verified" a 3:91 rear gear (chunk.. punkin.. third member.. whatever is the popular term these days)
i wanted to install a 3:91 rear gear in my 68 340 S and bought a unit off of ebay. it was advertised as a 3:91. "years ago" we used to just turn the pinion and count the revolutions and if the pinion turned close to 4 times for one revolution of the ring gear - that was a 3:91. can you gear heads confirm this procedure or tell me a better was to identify a 3:91? i suspect that you might be able to confuse a 3:91 with a 3:55 by just "counting."
any tips would be appreciated.
jim coster, pittsburgh, pa
i wanted to install a 3:91 rear gear in my 68 340 S and bought a unit off of ebay. it was advertised as a 3:91. "years ago" we used to just turn the pinion and count the revolutions and if the pinion turned close to 4 times for one revolution of the ring gear - that was a 3:91. can you gear heads confirm this procedure or tell me a better was to identify a 3:91? i suspect that you might be able to confuse a 3:91 with a 3:55 by just "counting."
any tips would be appreciated.
jim coster, pittsburgh, pa