6.2 ls3 GM performance crate engine

[Marky Dissod]

... a 10L80 w/3.42 might perform better than a 6L80 w/3.73? (while costing more as well)

May I show you something?

10L80: ... 4.69 ... 2.99 ... 2.15 ... 1.77 ... 1.52 ... 1.28 ... 1.000 ... 0.85 ... 0.69 ... 0.64 (7.32 Spread)
6L80E: . . . . 4.03 . . . . 2.36 . . . . . . . . . 1.53 . . . . 1.15 . . . . . . . 0.85 . . . . . 0.67 (6.01 Spread)

Awfully imprecise, yet it still manages to visually represent the improvement from the 6L80 to the 10L80.
10L80 not only has more gears than the 6L80, most of those additional gears are more assertive.
Look at it long enough, you'll see: it'd literally be COUNTERproductive to give the 10L80 any more axle gear.

3.23 is the GM OE axle gear for every suv with 10L80. OK, watch this:
10L80 x 3.23 axle: ... 15.15 ... 9.66 ... 6.95 ... 5.72 ... 4.91 ... 4.13 ... 3.231 ... 2.75 ... 2.23 ... 2.07 (7.32 Spread)
6L80E x 3.42 axle: . . . . 13.78 . . . 8.07 . . . . . . . 5.23 . . . . . . . 3.93 . . . . . 2.91 . . . . 2.29 (6.01 Spread)
6L80E x 3.08 axle: . . . . . 12.41 . . .. 7.27 . . . . . . . . . . 4.71 . . . . 3.54 . . . . . . 2.62 . . . . . . . 2.06 (6.01 Spread)

OK, so, if highway MpG is more important to you / her, then go with 3.42 with the 6L80E.
But if metro / urban stop'n'go, or towing / hauling is more important, seriously consider 3.73 with 6L80E.

Bet his wife'd NEVER let him have a 6.7L.

 

[mikez71]

Added a couple combos...
10L80 I used 4.70, 2.99, 2.15, 1.80 , 1.52, 1.28, 1, .85, .69, .64

10L80 x 3.08 axle: .... 14.48 ... 9.21 .... 6.62 .... 5.54 ... 4.68 ... 3.94 ... 3.08 ... 2.62 ... 2.13 ... 1.98 <------------------------------?
10L80 x 3.23 axle: .. 15.15 ... 9.66 ... 6.95 .... 5.72 ... 4.91 ... 4.13 ... 3.23 ... 2.75 ... 2.23 ... 2.07 (7.32 Spread)
10L80 x 3.42 axle: ..16.07 .. 10.23 ... 7.35 ... 6.16 ... 5.20 ... 4.38 ... 3.42 ... 2.91 ... 2.36 .. 2.19 <-------------------------------?

6l80 I used 4.027, 2.364, 1.532, 1.152, .852, .667

6L80E x 3.08 axle: . . . . . 12.41 . . . .. 7.27 . . . . . . . . 4.71 . . . . . 3.54 . . . . . . 2.62 . . . . . 2.06 (6.01 Spread)
6L80E x 3.42 axle: . . . . 13.78 . . . 8.08 . . . . . . . . 5.24 . . . . . 3.93 . . . . . .. 2.91 . . . 2.28 (6.01 Spread)
6L80E x 3.73 axle: .... 15.02 . . . 8.82 . . . . . .. 5.71 . . . . . . . 4.30 . . . 3.18 . . . .. 2.49 <-------------------------------?

Looking at that I might as well stay 3.08 if going 10L80.
But it doesn't look like a 10L80 with 3.42 would be particularly bad..

But yea, 3.73 definately spaces out nicely...

 

[j91z28d1]

do they have a 10 speed swap dialed in yet for these trucks? do you need a stand along controller or a segment swap in hp do it?