Awesome04Vette

Drag race guys! I recently had a bad night at the track and blew my diff. I was looking at having my current trans and diff built... RPM of course wants me to swap to the TR6060 and C6z diff... which runs about 10k not including the new rear cradle needed, coil overs for the rear, and the random little things...

Who on here has built the T56 and diff in their cars? How much power are you making and how long has it been in the car? Is it really needed to spend the extra 7-9k to go TR6060?

493lszosix

I saw your post on the quick list and your running nitrous and making much more power than me so my input may not help

I'm 490 n/a, trans has billet keys and springs and bronze shift fork pads, rear diff has c6z output shafts, clutches and pinion support and I'm also running a trans/diff brace, I run test n tune nights at the track pretty much every chance I get, I easily have 200+ passes, I'm not easy on the car at all I run every pass like it's the last pass I get to make, my times probably don't reflect my effort but I'm still learning and getting better

my trans and diff have held up well with no issues, I've launched anywhere between 5 - 7000, typically around mid to upper 5's have worked best for me lately, I also run bias ply tires which are easier on the drivetrain

Awesome04Vette

Thanks man! I appreciate your input!

TX Z06 02

Rebuild your diff with the c6z guts. About $550 in parts. See what breaks next.

Highly recommend a diff brace as well.

Awesome04Vette

Never even thought about doing it that way. If I am taking it all out I want to do the trans at the same time. Did you order a kit with all the parts for your diff or did you order piece by piece? I have never looked into it.

Diff brace is 100% going on the car!

TX Z06 02

You never said how much power you are making, so I'm not sure if you even need to do anything to the tranny.

Follow this thread for the steb by step and parts required. Its pretty straightforward. And you dont have to pull the tranny to pull the diff.

I also recommend bias ply tires. That takes some stress off your drivetrain. You can slightly spin the tires and still recover for great 60's, unlike using drag radials.

I had ~650hp through a stock mn12 and a 3.42 diff 3 rib with c6z guts (following the thread above).

Now I'm 650-700 with a 4l60e and the same 3.42 differential.

Awesome04Vette

Car is currently making 591whp/603ft/lb on 150 shot. looking to up the shot a little bit to 175-200 for next season. My car is a 6spd

TX Z06 02

Upgrade diff and add a diff brace and send it. I think the tranny will hold up at that power.

Awesome04Vette

Thanks for your input man! I wish there was a thread like that for the tranny too! haha. If I can rebuild my diff myself for less then 600 bucks I don't care how many times it breaks! hahaha.

493lszosix

You can buy a kit off of ebay that has everything you need to upgrade the diff

what exactly did you break, I'm guessing it broke launching?

Rick@RKT Performance

That’s actually my old thread before we became a sponsor. Give us a call and we can give you options from mild to wild that would fit your needs. We are also local.

Awesome04Vette

I havent taken it apart yet. Going to probably next month. don't know if I will have time this month with alot going on and a family vacation.

yea. I launched the car and soon as I let the clutch go and then the spray kicked on it broke.

robz

You need to hook up with Rick above as he can get you the right parts and guide you.
Don't spend money on stuff you don't need right now like suspension. I wouldn't add more nitrous either until you max out the capability of your current setup in 60' and ET.
There's a bunch of little stuff you can do to help that doesn't cost alot.

Awesome04Vette

Hey Rick! We actually spoke before. We talked about me switching to the C6z set up last fall. I just can't justify that 12-15k to do the swap. So for now I am going to build my factory stuff.

I want to build the trans and diff. Do you guys sell a kit to do it or do you only sell them built and ready to go in?

Rick@RKT Performance

You can go with 30 splined T56 and a C6 Z06 diff that will get you into the 9’s without problem. Any more than that you should really consider the TR6060.

Best to just call us tomorrow to discuss your options.

Rick@RKT Performance

Thank you Rob, I hope you’re coming to the rental on the 17th.

Awesome04Vette

I will touch base tomorrow with you!

cb2004mj

idk if this issue has been handled for you, but to provide my .02 where needed i will say, I'm on my 2nd c5, first one had stockish driveline(upgraded couplers in the Tq tube and new clutch) and now this one i bought with a broken driveline. so when it came to fix it i found a killer deal on a used RKt6060 with a rpm built 3.42 diff and Z06 axles and torque tube. I'm in the whole setup less than 4k and still have the stock stuff to sell. with that being said....this thing shifts amazing, gear ratios are way better, tighter, consistent and she likes the beatings i give her. and i gave RKT a call before install to discuss fluids, told them i bought it used, etc and they didn't care, they gladly discussed fluids and what they recommend for it, even telling me to call back if i had any other questions. great people all around. goodluck with whatever you choose.