Low_LSX

iTrader: (33)

Anyone checked this out yet?

TCI 4L80E 6-Pinion Planetary Sets:
"Product: TCIŽ 4L80E 6-Pinion Planetary Sets
Part Number: #277500 (1991-96 2.75 1st/1.57 2nd Gear Ratios); #277501 (1997-Newer 2.75 1st/1.57 2nd Gear Ratios); #279700 (1991-96 2.97 1st/1.57 2nd Gear Ratios); #279701 (1997-Newer 2.97 1st/1.57 2nd Gear Ratios)"

Pros:
- Improved acceleration and gear transitions in GM 4L80E.
- Lowers gear ratios to improve take-off.

fastnblu

iTrader: (2)

I know they had this for the TH400 years ago. Only downside: they weren't cheap.
It's cool more & more upgrades are comin out everyday for the OD trannies.

Coban

iTrader: (14)

For some reason, I remember hearing that these won't work with the stock computer.

silver-mod-o

iTrader: (15)

I've heard the same thing... I looked into this when mine was on the operating table.

2004SSS

iTrader: (25)

will the higher gear make them any weaker?

fastnblu

iTrader: (2)

Chase, call em if you're truly interested. I know when I looked on a maual gearbox, the higher u go up numerically, it lowers the TQ capacity if that's what u mean.

oldred95

Well now that is all fine and good but seems to me like that would defeat one of the biggest advantages of the 4L80E. I love the higher 1st and 2nd gear.

Manbearpig

iTrader: (1)

oldred95

For my engine its perfect. High enough to almost keep traction but still low enough to have great acceleration. I hated how the 4L60E would wind out in 1st around 45 mph then fall on its face going into 2nd.

Terri Cockrell

Hey everyone, I'm new to all this and looking to see if there is a conversion kit to change a 4L60E TO A 4L80E..... IF SO WHERE DO I FIND IT. Any help would be appreciated.

Thanks, Terri