I'm curious about something after reading this thread.

My '05 C6 has 75k miles and the shifting is quite "notchy". I know that's a vague term, but it's not smooth like several other cars I have, including the old, reliable ZF6 in the C4. In some cases, it's difficult to get into gear at all, most often first or second. Fiddling around and shifting into another gear then back to first fixes it, but this seems wrong to me.

Does that sound like a shifter issue, or are my synchros going in the trans?

TIA

 

As far as I know the OEM shifters are the same through the C6 production. I think the ZR1 and Z06 have different mounting pads for the shifter's base, but the shifters are the same.

No matter, the MGW is more fun, positive, and precise to use than the OEM version.

Tom

 

I believe there was a TSB for the 2005 C6 manual trans with a condition of hard to get into first gear. I had the TSB done on my 2005 c6 because it was frequently hard to get into first gear , but it was a few years ago now. Not sure if it was for a new first gear or synchro or something else. I just know that the trans had to come out, dealer covered it under warranty.

 

Yup on various parts of this forum I have seen people complain of their well written posts that are negative about a certain specified product purchased off of this forum being deleted. It totally skews my thought of products endorsed on this site and I have to take all positive posts as a grain of salt.
I have purchased from this sites vendors but I think its just dirty to delete posts if they are informative of ones experience with a product, good or bad.

 

mine was one of those post.

 

Hmmm. Looked through all the TSB's for the '05 and couldn't find it. THere were a couple regarding clutch pedal travel and difficulty shifting, but none mentioned difficulty getting into first. I'll call a stealership.

Thanks for the info.

 

I have found the info for you.

When driving from a stop, I sometimes cannot put the car into first gear. I either have to double-clutch, force or shift to second then to first to get it into first gear!

Here's the answer now from my Dealer's Service Mgr.
-Bill. :bmad:


Document ID# 1690618


--------------------------------------------------------------------------------

Intermittent Block Out of First Gear from a Stop - keywords hard no shift shifter stop #PIP3513 - (Aug 5, 2005)
Intermittent Block Out of First Gear from a Stop
2005 Cadillac CTS-V

2005 Chevrolet Corvette and SSR

2005 Pontiac GTO

Equipped with Manual 6 Speed (RPO - MM6, M10, M12 or MZ6) Transmission

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Intermittent block out of first gear at a stop. Driver may have the vehicle in neutral while stopped in traffic and when depressing the clutch pedal to engage first gear, the shift is blocked.

Recommendation/Instructions:
If this condition occurs less than 5 percent of the time, it would be considered normal. This condition occurring more than 5 percent of the time should be repaired. A clutching tooth improvement has been made to the first speed gear. Replace the first speed gear in the transmission. Check the gap between the vertical faces of the blocking ring teeth and the speed gear as per Document ID # 588712.

Transmission
Application
Part Number

MM6
Corvette
12455013

MZ6, M12
Corvette
88894089

M12
CTS-V
88894089

M12
GTO
88894089

M10
SSR
89059976


Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.



GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© Copyright General Motors Corporation. All Rights Reserved.

 

Dale002 - Shifter sent! $6.25 to ship.

Driver WT - my 05 would block out first gear all the time. My c5 did it too. When I had my transmission rebuilt it was built with the newer syncros and blocker rings and it's perfect now. Like night and day.

Pretty expensive fix though!

I have a great T56 rebuild shop in Fort Lauderdale if anyone needs one.

 

The stock shifter is fine for me 08 Z06 but I would really love to decease the preload for shifting into the 1-2 gate. Is there a spring in the shifter or is this dictated by the spring in the transaxle?

Would a 1-4 shift bypass effect this preload?

 

There is no spring in the shifter itself. They flop around when you take them off.

If my memory serves, there is a mod you could do on a C5 trans to reduce the 'notch-iness' of the shifter by spacing out a ball bearing that centers the shift rod in the gates. I don't know if you can do this on the T56 or 6060 in the C6's.

 

I think I've seen him posting since the initial thread, plus he eventually sold the concept to aftermarket parts places I think. He's also done more recently the seat fix thing.

 

Alright...you MGW fans convinced me to make this mod.

Question: Did most of you opt for an aftermarket shift **** as well (or did you retain the OEM)?

Thanks

 

I got a B&M precision shifter from a friend who sold his vette, but no hardware. My question is can I install it using the hardware from the original shifter?

 

2006 LS2 Vert..... I retained the OEM **** so far with the MGW. I'm still not extremely impressed with the t56 shifts even with the newly designed MGW but I do enjoy it better than stock.

 

MGW Shifter with their Race **** and changed fluid to synthetic on my 07. I have not experienced any issues with shifting. Very smooth in shifting.

Synthetic Fluid: Royal Purple, Amsoil or Red Line is what most people have used in here.

 

What can a short shifter do for me? Whats the difference?



TIM$VETT

 

Reduces the distance you move the shifter and in the case of the MGW is much more precise (as opposed to the vague and sloppy feel of the stock shifter).

San

 

Manual shifters are a tradeoff between effort and precision. Shorter levers make everything feel tighter and more "rifle bolt." The negative is that the shorter throw means you have to use a bit more muscle to move the thing. The result of this is that the mass-market car makers have to take things more toward the "easier but longer and sloppier" end of the stick and away from the more precise but harder to move end where a lot of driving enthusiasts prefer things to be.

Ferrari and the like don't have to cater to soccer mom realities so their manual trannies just come with a precise shifter to start with. But GM (who does NOT have every car they make spoken for in advance) has to leave it to the aftermarket folks to fix things.

MGW does a good job of it. Had mine in there for three years now and I still enjoy it.

These things are just items of personal preference. They don't really make the car better or worse - just different. Some like, some don't. Some ask "why bother? it came with one."

Whatever.

Z//

 

I actually have a couple other ***** I got at bargain prices here / still like the stocker....

For the record - I have been thinking about changing this fluid (approaching 27K miles but is 6 years old) and hope to do this near term. THANKS FOR Suggestion on types - I prob would have choosen GM. THANKS NS!

Others - MGW offers an additional lever to increase throw over their ST Version. It added nothing to shipping charges (Jul 11) to throw it in as an alternative so I picked one of those up too. (fwiw)