3.42 Gears and TruTrac
- Thread starter Harbin_22
- Start date
Hey Mark how do you like 3.42s and 6th gear on the highway?
Trying to figure out if I want to do one or the other...possibly both to my Lly
I want them in my wife's LMM if that tells you anything. You will have to adjust tcm tuning for them but if you have torque then they are awesome.
Mark , what has to be adjusted on the TCM . I ask cause I put 3.42s in mine and haven’t adjusted anything. What do they affect other than the speedometer reading? Mine seems to drive and shift fine .
Done.
I kept the 3.73s in the little truck b/c I figured I'd be using much larger tires.
If I was staying around 30" or smaller tire, then 3.42s would've made sense to use.
Depends on the setup but the shift points themselves because you are changing how you are loading the motor because the rpm difference. Full throttle shift points usually go off the rpm set point but the part throttle stuff is where you can really notice the differences.
Worse part about this is you can't even get these gears anymore They quit making them a while back and I don't think you will find them anymore anywhere.
They quit making them a while back and I don't think you will find them anymore anywhere.
Worse part about this is you can't even get these gears anymore
When did they stop making them? I may know of a guy with a brand new set in his garage.
I just ordered a set. My supplier shows Yukon having like fifty two of them on hand. But they have let me down on stuff like that before also.
I can honestly say that I can’t tell the difference from the 3.73s to the 3.42s . I just hope it helps at the track for a better 60’,better ET and higher MPH.
I bet there is a bigger difference between the 5 and 6 speeds. I noticed a nice drop in rpms on the highway.
I just googled it and you are correct! Called Summit racing to verify and they have them in stock so I'm gonna have a word with my sales people...
Gears are done in sets. Both pieces need to be replaced or you probably won’t like driving the vehicle around much for the noise.
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One tooth, thickness of ring gear, diameter of pinion, and pitch of the gears. It’s not that simple or everyone would do it for sure lol
Any noticeable differences between the Yukon gears vs going back with the AAM gears - as far as quality/durability and gear set-up?
I've run the Yukon 4.56 and 3.73 gears in other set-ups. Was thinking about getting AAM if I decide to do this swap.
I've run the Yukon 4.56 and 3.73 gears in other set-ups. Was thinking about getting AAM if I decide to do this swap.