PPG dogbox mod for T-56
 

I have been planning of pissing away my bonus when I get back. One of the things I'm looking at is the PPG low helical gears for the T-56. They run $4700 a set for parts, but they are significantly stronger than stock and can be reliably upshifted regularly without clutch. I can't find any data on the cost to install the kit. MTI has a package for $8500 that includes parts, but $3800 seems like a HUGE amount of money for transmission rebuild labor. Any data?

For that kind of money why not just go with a Jerico?

http://www.jericoperformance.com/5speedroad.htm

I think that's what LGM runs in their road race Vettes. :huh:

The gforce i have for the race car is similar, straight cut gears with dog rings and all the trimmings. I think it runs around 5k.gforce has the same setup for around 7k in a t56.

Like this one
http://www.corner-carvers.com/forums...ad.php?t=46459

Jericho would be nice, but I didn't see a price. The Gforce was tempting, but they have a bad reputation when power levels go up. PPG is more money, but they advertise daily driver reliability. Jericho is 45# lighter+++++. What is the cost and do they have a c6 kit? ALso how much to install the ppg kit in my t-56?

Call Remac in San Dimas, ask for Leo and tell him Guy sent you. Long time racer and multiple wally winner. He's the best I know of and will be able to hook you up like he did for me and Steven.

As far as the gforce goes lots of dudes are running them on corner carvers without issue. Mine is rated at 600ftlbs and features the same clutchless upshifting.

I know Lou runs them in his Vettes so there must be a kit I figure. I want to say prices depending on options for the road race package in the $6k range. If you want I'll give them a buzz and inquire more while our out of the country.

LG runs the hoellinger sequential unit which is $28k. Way too much. I haven't found a price quote for the PPG kit for labor only. If there is no machining then I can do it.

Maybe I was confused. I thought he ran them in some series . . I'll buzz Jerico just for a reference anyway.

Non of the kits should require machining from what I've read. You just need alot of one off tools.

Talked to Jerico. Basically forget it for C5/6 because of the transaxle setup in the late models. (I forgot the trans is in the back.) It would be a snap in mine (there's a bell housing for the LS, done), but it would require pretty radical fabrication to get it to work in your C6. I must have been just completely hallucinating about LGM using them I guess . . .

I'd still do the gforce like the one i listed on corner carvers

They seem like the best bet. The t56 is already strong, people twin turbo vipers to over 1000 rwhp and don't blow them up stock. I know i'm not worried about my t56 in the caddy

Especially after they use the 30t input shaft and cryo treated gears. The only complaints about gforce i've heard were towards their t5's.

Corvette forums and digital corvettes have some g force horror stories. The 1000hp reliability of the stock t-56 doesn't transfer over automatically due to the shock of the quick dog engagements.

They do use different synchros though, if I remember correctly. But the weak point in the CTS-v is the rear diff if I remember right. Though since you have an 06, it is the stronger unit right? I have been looking at a picking up a CTS-v next year as my 4 door 'family car'. Is my research off base at all?

I should have the same synchros as a C5 Z06, carbin fiber 1st, 2nd and 3rd i think.


The real problem with the First gen V's are the axles. They cause the rear to hop if you try to put to much power down. That's what breaks the diff apart. The newer cars have better diffs (3 versions) If you replace the axle shafts yo can get rid of about 80 - 90% of the hop in the dry. On the strip or in the rain you might cut it by 50%

I have 2 piece rear rotors and that seemed to help alot aswell. Right now I've been able to snap 2 axle, one stock and one upgraded chrome molly. So I don't fear for y diff to much.

Why not just beat on your trans till it breaks, then have it built with tougher gears and synchros?

Get a widebody kit and have your rims widened. Thatll help handling, traction, and make it look like a race car. I saw a red widebody trailered c6 a few years back. So cool.

Catastrophic failures during races can precipitate incidents that may be far more expensive than just beefing up something you know is going to fail. Farting around on the streets < 100mph is one thing, passing at 140mph is another.

I don't want the ppg upgrade for the improved reliability. I want it because shift time drop by more than a third. I expect to pick up 3 mph in a quarter and almost a full second. The PPG upgrade is deletes the synchs and replaces the gears with super strong units that are machined with dogs from a single piece on metal. The GFORCE and liberty kits either do not delete the synchs or have dogs that are welded to the gears :(. The cost of the kit is worth it. I just can't find an estimate on labor.

Uhm no they dont. I have my gforce apart right now and I can tell you nothing is welded. I can provide pics if you want. It has fully machined dogs.

Ill do it... $20. Ive got some JB Weld ;)

Pics please.

I check their website immediately after you mentioned it the first
time and they use synchs with a gear that have less angle to support more power. The PPG box has no synchros (1-4), but dogs to support faster shifts. PPG is the only company that I have found that advertises no clutch upshift capability with daily driver reliability in a t-56. The synchs on GFORCE are not welded, but the pics on CF of the Dogged GFORCE kits is welded. $4600 isn't that much money if it lasts a few seasons. There are other companies that advertise face plating the gears, but they are maintenance intensive.

I looked and could have swore they offered a dog ring t56. I keep forgetting we were talking about 2 different transmissions (i've been doing that alot lately)

So google searches show that gforce does/did offer a dog ring t56. Their website sunks big donkey slong so its difficult to find out anything, including prices. But i'd be willing to bet the dog ring t56 would look as great as my dog ring t5 does.