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900+ rwhp guys what trans and rear setups you running ?

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900+ rwhp guys what trans and rear setups you running ?

 
Old 01-16-2019, 11:57 PM
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jbigdawg79
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Default 900+ rwhp guys what trans and rear setups you running ?

Hey guys a little of whatís going on. I currently have a 99 c5. Recently bought a 402ci stroker engine. I was running a stock ls1 with ecs 2000 supercharger kit. Stage 5 rpm trans and z06 342 rear. Should be making somewhere north of 850+ rwhp. On e85. My builder and a couple other are telling me to swap my trans and rear for a rpm powerglide and irs 9inch rear. So Iím just here to see what other guys with that kind of rwhp are running. Will mostly be a street car with a 15 inch conversion. Might see the track for a shootout or 2. Thanks for the input guys.
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Old 01-17-2019, 08:01 AM
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neutron82
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if staying 6 speed then a tr6060 and diff from a zr1, grand sport, or z06 (08+) would probably be your best bet and then have it gone through unless you want to spend big money on a dog box, aftermarket gear sets, etc... all 3 trans have different ratios so that would need to be taken into account as well, rear gears are all the same but the zr1 does have a more robust diff case
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Old 01-17-2019, 01:35 PM
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T6060 and harden diff sourced from rpm if i remember right. 300m shafts.

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Old 01-17-2019, 02:28 PM
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Car is an auto.
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Old 01-17-2019, 02:45 PM
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Very interested in the responses to this.
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Old 01-17-2019, 07:00 PM
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Just a lot of money guys. Got a quote from rpm and Iím looking at about 18.5k in just parts. Anyone running 1000 rwhp on a built 4l60 ? Performabuilt says they have an almost anything goes warranty. Idk just hard to wrap my head around 18.5 in just parts when I just did a stroker engine. 😂🔨. Anyone have a used powerglide set up for sale ?
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Old 01-18-2019, 11:59 PM
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Old 01-19-2019, 01:40 AM
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Rob 02
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18.5K for a built 4L60E? Holy crap!

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Old 01-19-2019, 02:26 AM
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Andy Fernandez, Administrator on the C5 Modified facebook page, is offering a TH400 conversion for cars with serious horsepower. If you're not on FB, I can probably find out his contact info.
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Old 01-21-2019, 10:47 PM
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Originally Posted by Rob 02 View Post
18.5K for a built 4L60E? Holy crap!
18.5 k for powerglide and 9 inch rear setup
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Old 01-25-2019, 08:45 PM
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Originally Posted by jbigdawg79 View Post
Hey guys a little of whatís going on. I currently have a 99 c5. Recently bought a 402ci stroker engine. I was running a stock ls1 with ecs 2000 supercharger kit. Stage 5 rpm trans and z06 342 rear. Should be making somewhere north of 850+ rwhp. On e85. My builder and a couple other are telling me to swap my trans and rear for a rpm powerglide and irs 9inch rear. So Iím just here to see what other guys with that kind of rwhp are running. Will mostly be a street car with a 15 inch conversion. Might see the track for a shootout or 2. Thanks for the input guys.
If its mostly a streetcar I'd stay with a RPM 4L60 and a C6Z or C6 ZR1 diff. My trans lasted a long time driving hours back and forth to the track, ran 8's and drove home with the AC on. Full discloser, I did break the hardened input shaft, and was told I was the first one ever to have that happen. Your car will be much more streetable with the 4L60. If you want to go powerglide, make sure you use a speed calculator to find out what your cruising RPM's will be. You might be surprised how high it will have to rev on the highway with a powerglide
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