Summiz

hey all,
Much to my extreme chagrin, after only a handful of times driving my 03 Z06, where it seemed to shift fine, it has become evident that the transmission will need a rebuild. This prognosis was preliminarily from my new amigo corvetteforum.com member Josh, and then subsequently Buyavette. It grinds into second and reverse pops out. 4th is a bit sketchy as well. I got an estimate of $2700, which will take me a few months to scrounge. That all being said, my question is- is it better to limp it around once a week to try to keep everything circulating or no? What is the best way to preserve the tires/batter/fuel stability when its going to sit for 2-3 months?

4XLR8N

Bummer about the trans

Letting it sit for several months won't hurt anything, just put a tender on the battery so it doesn't die...

3sACROWD

Sorry to hear about the tranny.

For storage, I recommend the following
1) Full tank of gas (minimum) add fuel stabilizer (recommended)
2) Battery on a tender
3) Change oil (my preference)
4) Park on carpet squares (my preference)
5) Chock wheels and put tranny in neutral and parking brake off ( my preference).
6) Clean interior and exterior so when you're ready to drive the car again it looks ready too.
7) Place fabric softener dryer sheets in the interior and around battery / fuse box if worried about mice.
8) Maybe a container of Damp Rid inside the cabin if it will be humid.
9) Leave the car off until ready to drive again
10) Put note on dash reminding yourself there is a battery tender attached and wheels are chocked.
​​​​

Red Square

I'm sorry to hear it.
The guys at Buyavette are pretty professional and honorable...they service my car. If it is just a shifter adjustment I'll be very shocked.

JR-01

I take my battery out and store it in the basement on a tender. A battery can go bad at any time and a dead battery will freeze, possibly cracking the case.
I also use moth ***** in the cabin and engine compartment. Stinks for a day or two in the spring, but mice damage can get expensive.
And I shove some stainless steel pot scrubbers up the tail pipes to keep vermin out.

Vetteman Jack

This pretty much covers it if you will be leaving the car in the garage for an extended period of time. Along with the fuel stabilizer in the gas tank, you might want to take the opportunity to add a bottle of Techron when you fill the tank up.

Also, if you have a cover for the car, go ahead and place it on the car to keep the dust off the surface.

CactusCat

Before dropping $2700, read this thread and see if you can contact the OP there. He seemed to be experiencing similar issues but was able to resolve his. Hard to say, but might be worth your time.
https://www.corvetteforum.com/forums...ems-fixed.html

lane_viper

I rebuilt mine in my 03 20Kmiles ago. If you wrench yourself, you could save yourself a lot of money.

I bought this kit:
http://www.hawksmotorsports.com/t56-...d-kit-package/

and did the work myself. You will need a press to press the bearings on and off. Other than that removal was the most time consuming. Other than that, it wasn't hard. Go ahead and replace the clutch while you're in there.

ehillard0

My shifter was slipping out of 1st, and grinding going into 4th. Take it for whats it's worth, but after I adjusted my shifter, and installed a new transmission mount all my grinding issue when away. It really made a night and day difference. Might be worth a shot?

acuevo

ProMotion powertrain can rebuild starting at 375. Have to remove the trans and ship it to them though.

luffy

What about purchasing a complete replacement and then maybe a kit to rebuild your own.


1999 -2004 Corvette T56 transmission,
https://www.kijiji.ca/v-transmission...nt=app_android

Price: $ 1,500


Something like this would allow you to continue driving your car, then while the transmission is out, you could take your time rebuilding it. Once complete, install it and sell the "temp" tranny for about the same as what you paid.

~Josh

I'm starting to work at buyavette this Monday in the service dept.
I just finished my own rebuild on my Z, so when I heard the symptoms I knew right away it needed a rebuild.

To answer you question, you can still drive the car sparingly but know that each time the gear grinds as the collar is slipping into position (the syncro not doing its job) you're putting major wear at the engagement point between the gear and the collar/slider.

I had to replace my 2nd gear and collar and those parts alone cost me $710. I also replace all the bearings, syncros, pads and keys. $1400 total and that wasn't counting labor which was free.

Basic rebuilds don't always include bearings. I'd ask about that. Should add $200+ depending on brand.

Summiz

ehillard0 I am going to do the shifter adjustment, its worth a shot. Was that an EOM mount? I've read some stories of aftermarket/poly mounts creating a lot more NVH (obviously that's the case with any bushing/mount) and I'm not sure I want any additional NVH from my transmission...

Summiz

Dang I may have spoken to you then! I called this morning to cancel my apt


I appreciate the info Josh. As the days go by the idea of doing it myself seems to get more and more attractive. I'll start to gather info and see if its something I can manage. I've read about the rebuild manual out there for these transmissions, is that guidance you'd recommend?

Summiz

I appreciate the input Luffy, Its good to know all options.

Summiz

lane viper thanks for that info! I've heard so much about shop rebuilds and whether they include bearings or synchros so its good to see a complete kit.

Summiz

OH and congrats on the new gig man! sorry I didn't say that sooner.


I am probably in major denial and grasping at anything that could work

ehillard0

No, it was not the OEM mount. I used the Hinson poly mount for the transmission, which made a huge difference IMO. I really can't comment on the additional NVH from just the transmission mount, as I also have solid motor mounts.

grampi50

FWIW, I have been reading and hearing more about the trannies in the Zs as compared to the non-Z models. I'm assuming the two have different trannies, and I'm wondering why the Z tranny seems to be more trouble prone...

~Josh

No, same gear box, different ratios are the only changes. The Z is used/enjoyed more aggressively (because even off the track they are snappier and more fun than a base C5, hard to resist) which in turn uses up synchros, etc...