no my build date is 11-05

 

Weird.. My dad's 06 says 1-6 and its was bought sep 05.

 

now i am really woundering what the reason is mabey they just had a box full and you got what you got. b/c there all the same trans. G56's other that the overdrive on the 07+ is taller.

 

Well from what i understand the early g56s had a lower first gear than the newer ones do. Maybe those transmissions with first gear marked L have a lower first gear. The 2010 trucks that i have seen with 3.42s have the L and the trucks with 3.73s have the 1.

 

Well my dad's 06 has the lower 1st, and a "1"

I also don't understand the 1 vs L on 3.42 vs 3.73... You would think its the 3.73's that have "L" as the overall ratio is lower than a 3.42 with a "L"...

 

Some trucks come with the Getrag 56 which has the L-6 and some use the NV5600 which have 1-6.

 

Nope.... All 05.5+ trucks have a G56. My dads G56 has 1-6.

 

oh..well that's what I thought

 

i have an 06 with L my buddy has an 05 with a g56 with an L as well. i think its what ever they had in stock or a box full of to put on the shift lever..

 

It seems to be pretty darn random at best.

 

I also have an early 06 with the L instead of the 1.

 

My '06 has the L, 09-'05 buld date.


I'm sure it was just random, whatever shift **** was in the bin is what got stuck on your truck.

Or perhaps different plants where they were built? I'm pretty sure mine came from the Satillo plant.

One thing I would bet money on is that the L or 1 on your shift **** has absolutely nothing to do with your transmission.

I'ts just a ****.

 

My 06 was built in early March 06, and has a L for first gear. I put a new transmission in last fall with a build date of October of 09. First gear is the same on both transmissions only 6th is different.

 

Actually 1-4 and 6 are different, the only one the same is 5th.

AD
1: 6.29
2: 3.48
3: 2.10
4: 1.38
5: 1.00
6: 0.79

AE (Between 5 and 6% taller, except 5th)
1: 5.94
2: 3.28
3: 1.98
4: 1.30
5: 1.00
6: 0.74

And for grins
NV5600
1: 5.63
2: 3.38
3: 2.04
4: 1.39
5: 1.00
6: 0.73

 

The only gear that I feel a differance is on 6th but I guess the #'s don't lie.

It is strange that on the 2010 that some trucks have a L and some have 1??