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05-11-2012, 05:49 PM #31
remember these rpm numbers are with the tranny in a 1:1 ratio, so not in 6th gear. and with an auto there will be a little fluctuation due to torque converter.
Sorry about the issues and hopefully the tranny doesnt go prematurely, but if they will cover it. you definately want to get 4.10's in there for overall performance as you are making the tranny work real hard.David
2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
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05-11-2012, 05:59 PM #32
I hadn't realized it but the trans. in the chart is not whats in my truck but the rpms are close to what Im at and the chart is for OD.
The 4L70E transmission is the same as a 4L60e other than a speed sensor located in the pump. This transmission uses the name designation to signify it is stronger than a 4L60 or 65, but in reality this is not true. Even if shifting more efficiently due to improved input to the vehicle PCM could help, it wouldn't give more beef to the clutch packs, and this is where the damage is caused by weight overload. So basically don't expect anything more than what a Chevy always delivered in OD.
2011 Silverado CrewCab 5.3L*Ram Air Look Cowl Induction Reflexxion Hood*6" Pro Comp Lift*Flowmaster Dual exhaust*Perfect Launch Rear Diff. Cover*Led Smoke Taillights*L.E.D.Smoke 3rd Brakelight*60" L.E.D. Tailgate Bar*Rearview Mirror Reverse Camera and Sensors*Smoke Headlight Covers*Front Bumper Grill Insert*Deezee Black Alum. Diamond Rail covers*20" Ultra Motorsports Rims wrapped with 35.5"B.F. Goodrich Tires*Inchannel Raingaurds*CAI*Bullydog GT Tuner*Alpine Amp*Boss 6x9's*Boston Acoustic Subs*Terrantula Tweeters*Custom Sub box*Red Led Interior Accents*5% Ultimacool duo tint rear window and doors, 20% front doors*Custom Vinyl Graphics*Demolded*Debadged*Painted drums and calipers*
Future Mods Include: Custom Interior Hydrographics, Electronic Rollup Toneau Cover, 4.56 Gears, Painted rear bumper
05-11-2012, 06:20 PM #33
ok, I just assumed it was in 1:1 as everyone I have used/looked at was. but good luck with the dealership as it probably wont ever happen, but 4.10's would serve you better as you already know.
05-12-2012, 12:59 AM #34
Nice work all2010 Chevy Silverado Z71 ext cab.4x4
72 Monte Carlo 350-415 hp- sold (June 2011) to pay medical bills
79 Impala 350 4bbl 375 hp- sold (June 2011)to pay medical bills
"If He asks you to go a mile go two"
05-12-2012, 02:47 AM #35
Also for the record, anyone who has a 4 speed transmission, this scenario is roughly equivalent to having a 5.3 with 3.73 gears and the 4 speed transmission. 4.10's with a 6 speed would be roughly the same as 4.56's with a 4 speed, in terms of gear sets that are actually available.
Anyway, I hope that this situation works out for the best for you Phantom. I guess worst case scenario is that other people here learn from your situation and know about gearing when they go to buy trucks.
2008 FORD F350. My new all-around truck.
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2003 Avalanche Z71. No Cladding. Check out my Mod thread. - Crashed. Will be rebuilt soon.
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05-12-2012, 07:32 AM #36
05-12-2012, 10:36 AM #37
Great thread very informative.2012 Silver Chevy Silverado 1500 Z71 Crew Cab LT 6.2L 400+hp, Hypertech, K&N CAI, tent, AVS
2012 Black Harley Davidson Fat Bob 103 engine, Willie G
2011 Silver Infiniti QX56, 400+hp
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05-12-2012, 12:24 PM #38
- Join Date
- Mar 2007
- Grand Prairie, Texas
- Blog Entries
After a little searching heres what I found for the 6spd Automatic transmission presently used in Silverado trucks:
Hydramatic 6L80 Six Speed Automatic (MYC)
Six speed RWD / AWD, electronically controlled automatic overdrive transmission with torque converter clutch. Clutch-to-clutch architecture, with integral Electro / Hydraulic Controls Module
Maximum engine power:
469 bhp ( 349 kW )
Maximum engine torque:
439 lb-ft ( 595 Nm )
Maximum gearbox torque:
664 lb-ft ( 900 Nm )
Maximum shift speed
Maximum Validated Weights: ( Target )
GVW: 8600 lb ( 3901 kg ), GCVW: 14000 lb ( 6350 kg )
P, R, N, D, X, X, X ( X = available calibratable range position )
3-piece ( Bell, main, extension )
die cast aluminum
(2) Three-way on/off solenoids
Five variable bleed solenoid
Torque converter clutch:
Variable Bleed Solenoid ECCC
300mm ( reference )
Fluid capacity: w/ 258 & 300mm converter
258mm: 9.7L ( 8.22kg ), 300mm: 11.9L ( 10.1kg )
Transmission weight: w/ 258 & 300mm converter
258mm: Wet: 94-96kg ( 207-211lb )
300mm: Wet: 102-104kg ( 225-229lb )
Pressure taps available:
GMPT Toledo, OH
GMPT Silao, MX
Chevrolet Camaro SS Coupe and Convertible
GMC Yukon, Yukon Xl
Cadillac Escalade, ESV and EXT
Chevrolet Caprice PPV
Available Control Features:
Multiple Shift Patterns ( Selectable)
Driver Shift Control ( Tap Up / Tap Down )
Enhanced Performance Algorithm Shifting ( PAS )
Selectable Tow / Haul Mode
Engine Torque Management On All Shifts
Altitude and Temperature Compensation
Adaptive Shift Time
Automatic Grade Braking
OBDII / EOBD
Integral Electro/Hydraulic Controls Module ( Tehcm )
Control Interface Protocol - GMLAN
All information is direct from the GM Powertrain website http://gmpowertrain.com/PowertrainOverview.aspx
05-14-2012, 06:33 PM #39
So I spoke with an engineer at Rocky Ridge today and he is claiming with the thousands of trucks they have put out they have not had any driveability complaints such as mine. I can not believe that no one else has not noticed this issue. I can not get a straight opinion from a dealer on adding this size tires to the stock gearing except for "Your transmission is shifting correctly" basically avoiding the real issue. I can not believe there is no one else on this sight that has a Rocky Ridge truck. I guess I just got bent over the sales counter once again and basically told to DEAL WITH IT!!!! Oh yeah and to top that off. He also told me that the computuer was locked so no tuners can be hooked up to it to change the tire size/gear ratio. He told me I would have to send him the computer to have it done. Sorry to say but this will be the LAST GM product I probably ever buy. Ive had 12 chevrolet vehicles over the past 22 years I have been driving, and was planning on buying a new Camaro in 3 more years. I wonder if the upgrades to the Camaros that they send out to have done are missing a puzzle piece too. Well I threw those plans in the circular file and going to look elsewhere. I know all automakers have their issues. But this is BS. They havent heard the last of me. I have to wait 2-3k miles so the Transmission can learn my driving habits. Yeak ok, The trucks going to learn that when Im doing 70mph on a flat expressway that It shouldnt be shifting into 5th gear even if it doesnt have the power in 6th to stay at 70mph. What a crock of #%$#. Maybe every time I make a truck payment I will call GM and ask them if they fixed the issue yet. I dont know...... To Be Continued.
Last edited by the phantom; 05-14-2012 at 06:59 PM.
05-28-2012, 09:21 AM #40
Bump-Update. Well I called GM about the gearing issue and they told me I have to take it up with the aftermarket company that installed the lift and tires. They said that they "are" an approved aftermarket company for GM but anything that they install the dealer has to submit warranty issues to them directly and if its not related to what they installed then GM will take care of it. I exlplained to them that theyre "Approved Upfit company" does not do a very good job at putting a "complete" package together. Also I ranted about the lack of using good heat sink butt connectors when they installed the off road lights. When I took the lights off they had 1 crimped butt connector with all the wires going into it and some wire exposed already showing corrosion. So I then called Rocky Ridge and they told me that with installing the larger diameter tires that they were still within GM specs. and that they are not going to regear for me. They did say that if I want to regear it myself I would have to send them my tuner and my computer out of my truck so they could unlock the computer so I can change the gear setting in the computer. They told me they locked it down so when a dealer scans my computer it doesnt return to the stock tire size. (this also upset me that it was locked but I understand why they did it) So at this point I am removing all Rocky Ridge decals from my truck as to not advertise for a company that does not put a complete package together. So I am retaining the name of my truck and will keep the truck for a long time. Unfortunately in my opinion this experience has given GM a black eye (because they approved this package) and I probably will not purchase another NEW GM product again. Like I said in an earlier post ive been a GM guy since Ive been driving at the age of 18. I still like theyre styles and looks of vehicles but at some point it has to go beyond that.
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