Gmpp 4l85e!
03-22-2004, 05:02 PM
#1
Gmpp 4l85e!
I think I have made up my mind....finally!
Went to the Gatornationals this weekend, and guess what was at the GMPP booth? A GMPP 4L85-E, bolted up the high-hp 572 crate motor. I've talked with the Gainesville GMPP dealer that was there at the show, and he is giving me a KILLER price on it (actually, better than I could find a 4L65-E for online!!!!) Only problem is that it looks like there might be a core charge--I'm supposed to get a call back tomorrow. Even comes with a converter, like the '65 package.
It's not even in the catalog or on the GMPP website yet! I don't even have a part number. The guy that I talked to said that it was the first time that they'd displayed the tranny.
Anyone know what difference there is b/w the 80 and the 85?
Went to the Gatornationals this weekend, and guess what was at the GMPP booth? A GMPP 4L85-E, bolted up the high-hp 572 crate motor. I've talked with the Gainesville GMPP dealer that was there at the show, and he is giving me a KILLER price on it (actually, better than I could find a 4L65-E for online!!!!) Only problem is that it looks like there might be a core charge--I'm supposed to get a call back tomorrow. Even comes with a converter, like the '65 package.
It's not even in the catalog or on the GMPP website yet! I don't even have a part number. The guy that I talked to said that it was the first time that they'd displayed the tranny.
Anyone know what difference there is b/w the 80 and the 85?
03-22-2004, 05:06 PM
#2
This is the only thing that I've been able to find on the differences between the 80 and the 85:
Can it be true? The strength of the 80 and the gearset of the 60? Hmmm......
from http://www.truckmarketinginstitute.c...MCBkSample.pdf, page 15
Automatic Transmissions
Three four-speed automatics are available, the 4L60E, 4L80E and
4L85E, plus the heavier duty Allison 1000 five-speed. Each features
overdrive in top gear. Not shown (as it varies with engines) is the
torque converter ratio—which further multiplies the effective “gear
reduction” and torque output to the driveline.
Transmission Model Ratios for Each Gear
Speeds /Model Code 1st 2nd 3rd 4th 5th Reverse
4-speed 4L60E M30 3.06 1.63 1.00 0.70 ----- 2.29
4-speed 4L80E MT1 2.48 1.48 1.00 0.75 ----- 2.08
4-speed 4L85E M32 3.06 1.63 1.00 0.70 ----- 2.29
5-speed 1000 M74 3.10 1.81 1.41 1.00 0.71 4.49
The 4L60E and 4L80E are electronically controlled four speed
transmissions with a fairly wide ratio overdrive gear. This provides
for good fuel economy in fourth and still allows third gear to be
reached when more power is needed. The 4L60E is used below
8600-lbs GVWR while the heavier duty 4L80E is used in models
up to 12,000-lbs GVWR. The 4L80E also has slightly closer ratios
to provide less engine rpm drop between shifts. The 4L85E is a special
purpose four speed for use with the 325 hp high output Vortec
6000 (LQ4) used in the Sierra and Yukon Denali.With its higher
torque capacity, the Allison 1000 automatic is ideally suited for the
Vortec 8100 V8 or the Duramax 6600 V8 diesel.
Automatic Transmissions
Three four-speed automatics are available, the 4L60E, 4L80E and
4L85E, plus the heavier duty Allison 1000 five-speed. Each features
overdrive in top gear. Not shown (as it varies with engines) is the
torque converter ratio—which further multiplies the effective “gear
reduction” and torque output to the driveline.
Transmission Model Ratios for Each Gear
Speeds /Model Code 1st 2nd 3rd 4th 5th Reverse
4-speed 4L60E M30 3.06 1.63 1.00 0.70 ----- 2.29
4-speed 4L80E MT1 2.48 1.48 1.00 0.75 ----- 2.08
4-speed 4L85E M32 3.06 1.63 1.00 0.70 ----- 2.29
5-speed 1000 M74 3.10 1.81 1.41 1.00 0.71 4.49
The 4L60E and 4L80E are electronically controlled four speed
transmissions with a fairly wide ratio overdrive gear. This provides
for good fuel economy in fourth and still allows third gear to be
reached when more power is needed. The 4L60E is used below
8600-lbs GVWR while the heavier duty 4L80E is used in models
up to 12,000-lbs GVWR. The 4L80E also has slightly closer ratios
to provide less engine rpm drop between shifts. The 4L85E is a special
purpose four speed for use with the 325 hp high output Vortec
6000 (LQ4) used in the Sierra and Yukon Denali.With its higher
torque capacity, the Allison 1000 automatic is ideally suited for the
Vortec 8100 V8 or the Duramax 6600 V8 diesel.
03-22-2004, 05:10 PM
#3
The Sierra and Yukon Denali use the 4L65E not a 80/85e. 
Looking for a part number now.
03-22-2004, 05:27 PM
#7
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Here's some info I found:
The Vortec 8100 now mates to a new, heavier-duty 4L85-E version of the previously standard 4L80-E four-speed automatic transmission. The 4L85-E provides higher durability and handles more torque for even better off-line acceleration and launch capability. It also handles more torque in reverse gear. The 4L85-E can handle 460 lb-ft (624 Nm) of maximum engine torque, 20 lb-ft more than the 4L80-E. Design enhancements include:
A more robust overdrive roller clutch, featuring larger diameter rollers and a "shuttle car" design; it allows high-speed 4-2 downshifts without any shift sequencing delays and is designed with error-proof assembly features
A more durable turbine shaft; the shaft is induction-hardened using an electrical heat-treating process and then shot-peened to relieve internal stresses in the metal
Brazed blades inside the torque converter; they allow the torque converter to accept and transfer higher torque levels and increase durability
More pinion gears (five total), allowing the gearset to handle higher loads
In other respects, the 4L85-E has the same gear ratios and design features as the 4L80-E. That means operators get the benefit of GM’s Tow/Haul mode, for example, which reduces shift busyness and wear when pulling a heavy trailer. It also means they get the proven dependability and smoothness inherent in the 4L80-E’s basic design.
Thanks for the news Scream.
I know what I'll be putting in if my 80E blows again. 
The Vortec 8100 now mates to a new, heavier-duty 4L85-E version of the previously standard 4L80-E four-speed automatic transmission. The 4L85-E provides higher durability and handles more torque for even better off-line acceleration and launch capability. It also handles more torque in reverse gear. The 4L85-E can handle 460 lb-ft (624 Nm) of maximum engine torque, 20 lb-ft more than the 4L80-E. Design enhancements include:
A more robust overdrive roller clutch, featuring larger diameter rollers and a "shuttle car" design; it allows high-speed 4-2 downshifts without any shift sequencing delays and is designed with error-proof assembly features
A more durable turbine shaft; the shaft is induction-hardened using an electrical heat-treating process and then shot-peened to relieve internal stresses in the metal
Brazed blades inside the torque converter; they allow the torque converter to accept and transfer higher torque levels and increase durability
More pinion gears (five total), allowing the gearset to handle higher loads
In other respects, the 4L85-E has the same gear ratios and design features as the 4L80-E. That means operators get the benefit of GM’s Tow/Haul mode, for example, which reduces shift busyness and wear when pulling a heavy trailer. It also means they get the proven dependability and smoothness inherent in the 4L80-E’s basic design.
Thanks for the news Scream.
I know what I'll be putting in if my 80E blows again.
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04-14-2004, 01:34 PM
#10
TECH Junkie
Hughes and TCI both make a low gear planetary set for the 4L80E,with a 2.75 first gear and a 1.58 second gear,it's the same gear set that fits a TH400.The cost is about $600.