Dj_or_dj

As I peel the onion layers back one by one its looking more and more like another transmission issue

YAY

Dj_or_dj

😐 🙄 🫤

Dj_or_dj

Torque Tube coming out this weekend

Dj_or_dj

I have some bad news 🗞️, my transmission is SHOT ... I got the torque tube out and as I spin the input shaft of the trans in 4th gear which is 1:1 my input shaft rotates 1/2 a cycle before engaging the rear end. Which should essentially rotate 1:1, this will be the 3rd transmission I have broken in the car. 😂 🤣 😆

I will more than likely be dropping the rear end this week. I was hoping that it was just the clutch that broke, but instead it looks like SOO MUCH MORE! I may have broken an axle shaft in the differential as well. Removal and inspection of the driveline will reveal all.

I have plans for a replacement 😈 though.

Stay tuned because updates will be coming soon.


🔜 🔜

zrc3john

Since you purchased this car used , how many miles did you put on it before all the trouble ?

Dj_or_dj

I wouldn’t say ALL the trouble, the stuff that has broken is all part of making the car fast and upgrading parts

Since i have owned the car i have changed the oil a total of 5 or 7 times. Maybe.

But I drag race the car.

1st differential, the case broke in half at Fontana race way.
1st trans and torque tube broke at Fontana.
1st set of “fixed” heads lasted 13k miles

trans and diff broke between that 13k miles

Thought i replaced my trans w a tr6060 company screwed me over and sold me another T56

so that trans has 18k miles on it maybe … along with the differential.


If I didnt abuse the car like I do I would feel some sort of way. But I cant.

I will say that I have more than $50k into the car the way it sits from upgrading things I have broken.

and expecting to spend another $5-8k in drive line now.

But hopefully tomorrow I pick up a TR6070 i found and do a 4.10:1 final drive gear ratio in it.

which will help make this thing a monster.

Dj_or_dj

if you’re curious about what all I have done to this thing …. There are 10 full pages of documentation above this.

RACECAR life = forever broke

Dj_or_dj

Hey all,

I just picked up a replacement transmission, in form of a TR6070

starting to think about a 3.90 or 4.10 final gear swap


looking at the numbers on tremecs website 4.10’s should yeild

1st 59.4
2nd 84.4
3rd 112.56
4th 135.97

a 7000 rpm

and 3.90’s result

1st 62.45
2nd 88.73
3rd 118.33
4th 142.94


I like the idea of getting to 4th gear sooner down the 1/4 mile.


it also looks like the 4.10 gears will put me a bit higher in the power curve between shifts. Which would be a benefit, but is that juice worth that squeeze?

opinions?

Dj_or_dj

Hey all,

RECAP on the most recent episode of WHAT ISN’T $@#%ED UP WITH MY Z06?

At this point the only thing I can do is laugh about it.

LOL

I separated the Torque tube from the transmission last week. And was able to spin the input shaft of the transmission.

From the feel of the transmission when turning the input shaft by hand I get 1/2 a rotation ( ZERO shaft resistance I believe ) before something in either the transmission or Differential engages and the rear wheels begin to turn. Sooooo there is that.

The way it feels is, that my transmission input shaft broke and the lack of a “gear driven resistance feel” is because its rolling on the bearings until something in the Transmission actually binds against a gear and engages the other gears to spin the output shaft which engages the diff and turns the wheels

Anyways as you all know,

I recently picked up another transmission from a 2017 Z06 coded ( BUG ) and will be dealing with a TR6070 swap. I am still thinking about running either 3.90 or a 4.10 gear set instead of the 3.42 in the diff now. That way I can get it into 4th gear sooner and pull my way through the 1/4 mile.

I previously thought I had bought a TR6060 after my original diff cracked in half, transmission broke and Torque tube twisted. But as you know I found out it was a T56 when I was putting it all back together before I moved.

I wasn’t hip to the differences then but I surely am now.

Stay tuned because the rabbit hole is deep.

plenty of pics to come

@Jfryjfry you were right… lets see where the dust settles.

Dj_or_dj

@Jfryjfry You know I was being hopeful haha,nothing that has broken with this car has been an easy solution.

Dj_or_dj

I did a few measurements of the t56 and TR6070 today. From the mounting face to mounting face.

measurements

T56 Transmission 19.29”
05-08 C6 Torque tube 54.75”
TR6070 measures 21”
17 C7 Torque tube 53.50”

07 C6 Trans and TT = 74.04
17 C7 Trans and TT = 74.50

the standard bell housing depth is 6.29”

74.04 and 6.29” = 80.33”
74.50 and 6.29” = 80.89”

.89” - .33” = .56”

.56” / 2 = .28” deflection on CV axle which is not bad.

I am going to buy a C7 manual torque tube and bell housing to see how well the bolt holes align and if it will mount.

my biggest area of concern is that top middle mounting bolt. It has an offset between the LS the LT4. But all other bolts align. And It looks like the quicktime bell housing addressed that issue.




I am also looking at a quick time Bell housing as well.




T56 bell housing

TR6070 bell housing.


Quicktime bell housing

jayyyw

I run a 4.10 differential.. I love it

Dj_or_dj

who did your ring and pinion swap?

furious427

I love my 3.90's, although I do wish I just went with the 4.10's. RPM did my diff for me.

Dj_or_dj

Which transmissIon?


T56 or TR6060?

Dj_or_dj

One of my good friends just did a 3.90 swap on his.

He said it accelerates so much harder and that 6th gear is so much more usable.

everyone whom i speak with that has done the swap say they love it.

Dj_or_dj

are you on stock or billet axle shafts?

furious427

RPM Stage 4 T56.

furious427

Yah it made the car alot more fun for me, plus I drag the car so it helps alot.

furious427

It is RPM's stage 3 diff.

• Media Blast Transmission Case
• Seal & Gasket Kit
• 300M Left Stub Shaft
• 300M 2-Piece Right Stub Shaft
• Upgraded Carbon Clutch Packs
• HD Preload Springs
• C6 Z06 Pinion Support
• 2.56(30 spline), 2.73, 2.93, 3.42, 3.73, 3.90, 4.11 Ratios Available
• C6 Z06/ZR1 Ratios Only: 3.42, 3.90, 4.11
• Performance Metal Micropolished Ring & Pinion