performabuilt

iTrader: (25)

4L60-E M30

Type: Four speed rear wheel drive, electronically controlled, automatic overdrive transmission with a torque converter clutch.

Engine Range: 2.2 Lb 5.7L
Maximum Engine Torque: 350 lb-ft (474 Nm)

Maximum Gearbox Torque: 670 lb-ft (910 Nm)

Gear Ratios:

1st 3.059

2nd 1.625

3rd 1.000

4th 0.696

Rev 2.294

Maximum Shift Speed:

1-2 6000 rpm

2-3 6000 rpm

3-4 6000 rpm

Maximum Gross Vehicle Weight: 8600 lb (3900 kg)

7-Position Quadrant:

P, R, N, OD, D, 2,1

P, R, N, OD, 3, 2,1

Case Material: Die cast aluminum

Control Systems

Shift Pattern: (2) Two-way on/off solenoids

Shift Quality: Force motor control

Torque Converter Clutch: Pulse width modulated solenoid control

Converter Size: 245 mm & 298 mm (reference) (Diameter of Torque Converter Turbine)

Fluid Type: DEXRONŽ III

Transmission Weight: Dry: 66.4 kg (146.4 lb) Wet: 73.7 kg (162.5 lb)

Fluid Capacity (Approximate): Dry: 7.9L (8.4 qt) with 245 mm 1 0.6L (11.2 qt) with 298 mm

Towing Capacity: 6,130 kg (13,5001b) (Maximum Gross Combined Vehicle Weight)

GregWS6&z28

iTrader: (8)

good post. may be sticky worthy.

would you say that the ratings of a 6,000 rpm shift speed would still hold true for a built trans?

spy2520

iTrader: (3)

i'm surprised it says the 3-4 shift max speed is 6000rpms since alot of people think WOT into 4th is fatal...

ChocoTaco369

no. with a better pump kit, springs and clutches, you can wind it further. don't ask me how far, i'm no expert, but the weakness that determines that 6,000 rpm shift speed is due to the weak pump and spring. it doesn't let enough fluid get to the clutches at high rpm's and that results in toasted clutches. fixing this problem lets you wind it up further...but not much further. of course, you still have to worry about breaking your planets, stripping your sunshell and all that jazz up at those high RPM's. just know the faster you spin things, the better chance of them flying apart - no matter how built the tranny is.

performabuilt

iTrader: (25)

no a built trans with stiffer pump spring and thicker sunshell and tight bearing clearances should be able to exceed that , These are just the specifications as published by GM .
I posted it because I see many post asking what a stock 4l60e can handle and this looked like the answer

Phoenix 5.7

iTrader: (7)

so the trans is barely rated at what the ls1 makes! go GM!

Cody Brooks

iTrader: (2)

yeah but think about how often does gm underrate there product lines? the book i got in ASEP says the max rpm on the 3-4 shift is 5400 rpm.

RPM WS6

iTrader: (3)

A stock 4L60E will do fine shifting at up to 7500rpm......


.......once.

performabuilt

iTrader: (25)

well guys these are gm specs and in fact the probably are under rated somewhat considering gm has to build a car that in stock form needs to last 100000 plus miles , So im sure these numbers ae a little less that what it can actually handle but it a good baseline to think by

spy2520

iTrader: (3)

you think maybe they could have considered the whole 100,000 mile thing when measuring these specs? i mean it could be possible they mean that a 4L60e can hold 350lbft of torque reliably for 100,000+ miles...

performabuilt

iTrader: (25)

I would say thats most likley a true statement though it can im sure in even stock form handle considerably more for a shorter time

Cody Brooks

iTrader: (2)

my car has 114000 on it the modification my tranny has is a trans-go shift kitg and and extra tranny cooler in series with the stock one. both of which where added recently so it lasted over 100000 without a change made to it at all.

s346k

iTrader: (4)

my buddy has 3 ls1 a4 b4c cars, all of which had over 120k on them at the time of purchase. one of them went 162k on the stock trans/engine before he pulled/replaced both with built units. the other had 135k on the stock trans with no problems, and the last one is up to 125k now with no problems.

performabuilt

iTrader: (25)

cool I like people saying when there 4l60e did well ussually the only post that happen is when they dont which give the impression however wrong that the 4l60e is very trouble prone transmission when this is far from the truth ,But as is human nature we tend to whine far more about things when they go wrong and have little o say if anything when they are right

mullenh

iTrader: (1)

ok, i will ad to that the l460e is a very good tranny and it will hold over 600 foot lbs of torque for brief periods. it is not expensive to to upgrade. i have one guy in my shop who has done over 100 upgrades to full rebuilds (most all of it for racing) on this trans.

Arrambide

I Agree, so we need to install a Trans cooler, and deep pan so start to reduce the posibilities of failure.

s346k

iTrader: (4)

my personal experience with the 4l60e is about 63k miles worth of abuse, 25k of which had a 4k stall and transgo full race/high stall shift kit, which resulted in consistent low mid 1.6x 60' at the track. it shifted just as well the day i got rid of it as it did the day i bought it. it's a stock transmission, i think you guys are asking too much of stock parts...just because the engine was touched by the hand of god doesn't mean he stuck around long enough to hit up the trans, too!

performabuilt

iTrader: (25)

If you have the upgraded 3-4 set and OD servo a WOT 3-4 should not be a problem

TonyGXP

anything on the 70E?? know we Redline at 6500, and that's where mine shifts at.

performabuilt

iTrader: (25)

Ill see what I can find ,