Example: 4L60E

The "4" simply means that the tranny has 4 forward gears.

The "L" stands for longitudinal, indicating the tranny is for use in a conventional rear-wheel-drive (or 4x4) application. A 4T60E is almost the same tranny, but the case is totally different for use in a front-wheel-drive car with the engine mounted "transversely", hence the "T".

"60" is a number used by GM to describe what they call the "relative torque capacity". 4L60E is typical of s-10's and 1/2-ton trucks running 4.3's and small V-8's. A 4L80E has a higher torque capacity number, and therefore can be used in 3/4 and 1-ton trucks with big-block engines such as the 8.1L The 4L80E is closer to what the old TH400 was, whereas the 4L60E is basically what the old 700R4 was.

"E" simply means electronic. This indicates electronics play a role in the application of various apply devises within the transmission. The 4L60 wasn't electronically controlled, and was simply a 700R4.

are you learning this in summer school at the community college. :flipoff2:
J/k, probably enlightened some that didn't know.

Oh yeah, well, well......explain the designation on the Allison 1000 series!











joking, but thanks for the reinformation, probably helped some of the newbs in the new chevy noobie forum

4T60-E

Same although T stands for "Transverse"

probably helped some of the newbs in the new chevy noobie forum


Any luck the forum will regain it's 'Tech' classification??? 'Cause I have a question about chipped paint on my Pop's Bravada..... :D

4T60-E

Same although T stands for "Transverse"

Cost $1800 to fix :flipoff2:

the 4t60e has nothing in common with the 4l60e, except that they're both od units from gm.
all the 8.1s have allisons behind them. the 4l80e has been discontinued and the 4l60e has become the 4l65e for the most part and is used in vehicles as big as suburbans with small blocks. 4l80e also came behind small blocks and all big blocks until they were dropped.
for the front wheel drives, there's also the 4t40e, 4t30e, 4t45e, 4t65e, 5t40e and the 4t80e.

Have they dumped the 4L80E for all models, or just pickups?

http://www.gm.com/automotive/gmpowertrain/transmissions/hydra/apps/index.htm

So I've been researching a possible project and I'm trying to find every vehicle that came with the 8.1/Allison combo. I know 3/4 and 1 ton trucks, but thought the 3/4 ton Avalanche came with them, too. But now I'm finding the 6.0/4l80e combo in later model Avalanches. Did only the early Avalanches come with the 8.1/Allison combo? If so, are they the same as the truck engine/trannies?
Travis

Here's a link (http://www.avalanche.racenet.net/exhaust.php) to a site that has aftermarket exhaust for an Avalanche with Allison, 2002-2003. Hit Cnrtl+F and search the page for "Allison".
Travis