Stock Rearend and Tranny, How Much can it take?

tmroc · 10-14-2009, 04:28 AM

Whats the MAX RWHP and RWTQ can a stock A4 tranny with a 3.15 rearend take before it breaks? I have 440 RWHP and 410 RWTQ now. I would like to bump it up a bit, but just want to know if the T & R will take much more. The car almost never see either track.

DynamicTuningSolutions · 10-14-2009, 06:49 AM

Since stock transmissions can break and so can modified ones, I'm not sure that can be answered properly. Obviously, a built trans and rear end with quality high performance components has a better capability to cope with extra horsepower though.

IIRC the "fatal" limit on the 4L60E/4L65E/4L70E is somewhere around 800 HP. In a truck it would be less since much higher mass is involved. Stock trucks seem to kill stock 4L60E/4L65/4L70E's much quicker than Vettes.

fishslayer143@yahoo.com · 10-14-2009, 05:16 PM

Quote:

Originally Posted by tmroc

Whats the MAX RWHP and RWTQ can a stock A4 tranny with a 3.15 rearend take before it breaks? I have 440 RWHP and 410 RWTQ now. I would like to bump it up a bit, but just want to know if the T & R will take much more. The car almost never see either track.

i would think you are pretty close now on the stock trans the differential probaly has some left

chappy · 01-24-2011, 07:32 PM

With a rolling start, you should have lots of room. IF your looking to smoke the tires, that's where all the trouble begins, one reason why most racers race from approx 20mph roll, except 1/4 mile track racers who always BREAK stuff.

fishslayer143@yahoo.com · 02-01-2011, 12:30 PM

rolling starts are much easier on the drivetrain..high rpm launches from a dead stop will show you whats weak real quick.!

10-14-2009, 04:28 AM	#1
tmroc Smokin Member Join Date: Oct 2009 Location: DFW Posts: 8 My Gallery	Stock Rearend and Tranny, How Much can it take? Whats the MAX RWHP and RWTQ can a stock A4 tranny with a 3.15 rearend take before it breaks? I have 440 RWHP and 410 RWTQ now. I would like to bump it up a bit, but just want to know if the T & R will take much more. The car almost never see either track.

10-14-2009, 06:49 AM	#2
DynamicTuningSolutions Agent Supporting Vendor/Tuner Join Date: Jan 2008 Location: Reseda, CA Posts: 4,628 My Gallery	Since stock transmissions can break and so can modified ones, I'm not sure that can be answered properly. Obviously, a built trans and rear end with quality high performance components has a better capability to cope with extra horsepower though. IIRC the "fatal" limit on the 4L60E/4L65E/4L70E is somewhere around 800 HP. In a truck it would be less since much higher mass is involved. Stock trucks seem to kill stock 4L60E/4L65/4L70E's much quicker than Vettes. __________________ Strictly/D.T.S. The official So Cal tuner of SmokinVette! 7444 Reseda Blvd. Suite K. Reseda, CA 91335 818-342-5693 Shop 818-262-7409 Cell DynoJet 224xLC Load controlled dyno on site DTS/Strictly in print http://www.gmhightechperformance.com...ure/index.html Always Support Our Troops!

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01-24-2011, 07:32 PM	#4
chappy Smokin 500HP Club Join Date: Jul 2008 Location: Mid West Posts: 561 My Gallery	With a rolling start, you should have lots of room. IF your looking to smoke the tires, that's where all the trouble begins, one reason why most racers race from approx 20mph roll, except 1/4 mile track racers who always BREAK stuff.

02-01-2011, 12:30 PM	#5
fishslayer143@yahoo.com Smokin 5000HP+ Posting Maniac Join Date: Jun 2009 Location: New Iberia LA Posts: 6,906 My Gallery	rolling starts are much easier on the drivetrain..high rpm launches from a dead stop will show you whats weak real quick.!

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