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Christmas arrived early this year! I finally got my hands on the 3.89 gears. Donor was a 59 truck with 6 cylinder, standard transmission. A little clean up, paint and pinion seal then in they go. 
Last edited by dan_6776 (May 5, 2017 10:07 pm)
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Very nice! How did you find one of those?
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I was given a name and phone number from a friend who knew a guy. Well it turns out this"guy" is retired and did own a wrecking yard business is entire life. However, he lives on a small farm now and maintains a "private collection" of vehicles. Lucky me.
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Nice. Always good when we can find those kinds of deals.
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Happy to report back on the road! I have noticed a significant performance increase when dropping the hammer! The car pulls much harder than before. I just realized that changing gear ratios is a good option for performance if you don't want to sink a pile of money in your engine or you want to leave the engine factory OEM.
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dan_6776 wrote:
Happy to report back on the road! I have noticed a significant performance increase when dropping the hammer! The car pulls much harder than before. I just realized that changing gear ratios is a good option for performance if you don't want to sink a pile of money in your engine or you want to leave the engine factory OEM.
Good news, it appears to be working as it should. What did your highway RPM's go to, say 100 and 110 kph cruise? Is it a comfortable RPM?
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The 3.89 rear woke my car up. I can go around corners and drop it into 3rd, not 2nd. At 70 my RPMs went from 3000 to 3250. I'm not big on dropping the hammer from a dead stop, but going through the gears the car really moves now.
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Highway RPM's are comfortable. I don't have a tach on the car so relied on an online calculator. The 4.6 engine is a coil on plug unit so not sure what is involved to install a tach...something I should look into?
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I always run a tach. I would assume there are lots of coil on plug tach options as all the tuners run tacks and all their imports would be set up coil on plug.
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Is there an OBDII port on the computer, or something like that? I'd think there is a smart phone app that can probably give you those readings, if you can plug in.
