anti venom mod good or bad
 

i just got my c6z shifter from gene and am going to instal it in my 2004z. has anyone gone another step and done the anti venom mod. if so what was your impressions? did you get the mod or just add washers to the existing bolt? any comments appreciated. thank you.

why is it named such a non descriptive name any ways?

The shift is easier with the anti-venom mod that I did on my 2004 Z. Just do it and see if you like it or not, it's one of the easiest and cheapest mods that you can do.

Do a search on it, its been discussed to death.

IMO, it makes the trans feel worn out and you lose the "feel" to the shifts. You are taking most or all of the detent out of the trans which is a bad thing.

This is true only if you back the detent out too much. Experiment with the washer thickness and you can get a good balance between reduced resistance to movement and precision. Having done so on my C5 and my C6, I'm very happy with the results.

Separate issue: What's the basis for your last comment? Decreasing the detent engagement is not a "bad" thing as long as you don't eliminate all engagement.

Last item, to the previous poster: It's named after the forum name of the guy that started the ball rolling on this.

The original anti venom mod eliminates the detent completely, people began using washers as a way to get around buying the anti venom mod plug.

Detents play a valuable role in the operation of the transmission. Having a solid mechanism to hold shift forks in a neutral position and keeping undue drag/pressure off the forks and shift assembly extend the life of synchros, idlers, shift forks, and other associated components.

Once again, its my opinion that removing or even lessening the detent action just makes the trans feel worn out. You want a positive feel to the shifts.

Thanks mneblett, I've been wondering about that for a good while.:)

I thought it was named anti venom because originally it was named Venom and they charged and outrageous price for the part......so people started using washers which got the name anti-venom.

Who knows, thats just what I have read before :D

Anti-venom is the name of a person's business in Florida that does Corvette mod work. The name is a play on outperforming Cobras and Vipers, hence the Corvette is the "anti-venom". He invented the replacement bolt that did away with the detent mechanism. Someone figured out you could install a washer instead that would sort of accomplish the same thing but retain the spring loaded detent ball. It would also be much less expensive using the correct washer. I installed the washer in my car. It still retains some of the feel of the detent but shifting is a lot smoother and easier. Recommended mod, it works great.

I used the plug in mine from Antivenom. So no detent. It does not feel worn out just less notchy. I have not missed a shift or bent any forks since installing over a year ago. Some people say it is to sloppy without the detent. I like the feel and have no problem shifting the car. I also changed to the C6Z shifter this past July. Nice improvment as well. You should just try it to see if it works for you. Do not take other peoples opinions on how your car will feel! You decide. Also the washer method is cheaper, and does the same thing if you space it out enough. And for the poster that said it wears stuff out faster :bs I talked with the Tremec guys at Carlisle and he said it would not hurt anything at all unless you can't shift worth a **it to begin with and then all bets are off anyway:cheers: Don

Whats the difference between the washer method and the detent method? Do they both do the same thing? Can they both be done at the same time? Anybody post a link about doing this mod?

Thanks,
Vince

The Antivenom part is simply a bolt made to replace the factory detent. It also has a rubber o-ring on it. The washers are used to place over the factory detent to space the detent away from the linkage. Don

Believe what you will, I speak form practical experience, not just "talking to people". You really think GM put the detent there and at a particular spacing for no reason?

As always, my statements are IMO. What you do with your car is your business.

I would hope that 15K miles and over a year with it installed would count for pratical experience. You think GM is perfect? Lets talk column lock issues, fuel sender issues and a slew of others. I'm not trying to get into a pissing contest. I am saying the OP should try it to see if it works for him. No More No Less! I left it in. YMMV. Don

I agree with that 110% That is the ultimate test of a mod. As always - to each his own. I tried it and absolutely hated it.

posts 10 and 15 in this thread explain the anti-venom mod and the shifter linkage adjustment. if you're running a stock shifter I wouldn't recommend this cause it does make the trans feel like a 67 VW bus.... but if you've got a short shifter it's a nice mod to bring the shift pressure back to stock while retaining the shorter throw of your aftermarket shifter...

:thumbs: :cheers:

I have done the anti venom mod on a 1997 MN6 with a C6Z shifter and knob. The difficulty of shifting has dropped considerably, but as people say it also lessens the "nochyness" so if you're looking for definitive shift gates/feel, this isn't the mod for you.

I personally like the easier shifting and haven't seen any negative effects with over 5k since I did the mod.

I put the washer on mine and removed it after about a week. I did not like the sloppy feel, plus it was difficult to feel good engagement of the gears. I like positive engagement. I changed mine back to stock and will never consider it again. On a side note I like to drive my car hard and shift fast, if you are just cruising around and "granny" shifting you might like it better.

if you have an actual short shifter (hurst, B&M, MTI, etc.) it's a nice mod, for anybody with stock or similar (C6 is not a short shifter) it's probably going to feel like crap.

I never had any complaints about the oem C5/Z16 shifter. I did shorten mine by 3/4" and added a HURST knob...and liked it more.
I decided to use a 1/8" thick copper washer with the shifter...I liked it even more!
I've since installed a B&M "Sport" shifter and reduced the thickness of the washer to 3/32"...guess what? I like it, also. :thumbs:

I did the C6Z shifter shortened it even further, threaded it for my Hurst ball, used .151" copper detent spacer, and achieved exactly what I was looking for. But then I'm not a flat shifting drag racer. If I wanted a C5 drag car I would have bought an A-4 shifted car. I'm happy with the improvements made to the shifting action. This $1.50 mod is so easy to do and reverse if desired, yet has people on both sides of the fence on it's value, I would just suggest the folks contemplating it to "just do it" and report back here afterwards with YOUR opinions. :thumbs:

One of the best mods doable on a C5, and the cheapest.

I'm so confused:crazy:

tagging this post for later

I did this mod to my low-mile, stock '03 Coupe a year or so ago. I first went with the two-washer stack that everyone seemed to use, but it made the shifter feel sloppy. I took one washer off and that is how it still sits. Seems to feel a little better than stock, a bit easier to get into First gear is the biggest difference.

Yep,did it on my 02Z.I used 3 washers.BIG diff in smooth shifting.

As always,IMO.

\db2
carolina

I did it. only negative effect is in the last 3 years since it was done I've had the car pop out of 6th about 4 times.

my only problem with it was that it didn't take the notchiness out enough. I even tried the shifter action with the detent completely removed (engine off) and it was still notchy. I hate the feel of moving this car into gears as a result. make same feel like I'm shifting through sand.

my brother has a 99 Z28 6 speed. same year, same engine, same trans (as far as I know) and his car shifts so smoothly. I just don't know how to make mine do that. figured it had to be something with the rear mounted transmission, but the C6 is also in the rear and it shifts nicely as well. Actually one of the main reasons I have any interest in the C6 is no notchiness in the shifting.

Ive never done the anti venom mod BUT,,, I love the feel of my 02 ZO6/ KIRBAN Ripper Shifter install. I installed the KIRBAN shifter adjusted it and have not looked back.
I like the professional feel of the shifter pared with the tranny. For me ,,, removing the shift gate feel would be counter productive.

Everyone has their OWN ides of what a tranny should feel like when shifted. My expierences are from the early 70's to now!:eek: I cant see why people gripe about the new C5/C6 shifter feel Its soooommuch better than old shhool shifter technolgy....So,, HELL,,, try it! Its easily reversible. If you don't like it, just remove it. If you like it,, :thumbs:

For me,, a tranny with wishey washey shift placement is NOT GOOD. I need to know that the tranny is POSITIVELY in GEAR and the detents help. So does the SHIFT STOPS that are part of the KIRBAN shifter... When properly adjusted and the person fully understands what there for and, there a GOD SEND!

Thats my opinion but,,, there are THOUSANDS of other,,,,, so,, experiment and see what works for you. My tranny/shifter works very effectively for me. Hope you can find the correct combination for you.

http://img.photobucket.com/albums/v4...DSCF0055-4.jpg

http://img.photobucket.com/albums/v4...CruiseInIX.jpg

BC

Bill Curlee

I did it using 2 bronze shims, forgot what size though, its been so long and dont even have to turn back, i love it this way.

Like Nike says Just Do It. I used whatever the recommended washers were and the results are perfect. My adventure started with all stock items. Hated the car. Bitch to shift. So first off was a hurst shifter with a ZO6 solid base. Still sucked. Adjusted the linkage. Still sucked. Changed to Royal Purple Synchromesh fluid. Better, but not right. So $200. into it I bought $2. in copper washers from Advanced Discount. Did the mod and absolutely love the way the car shifts.

Anybody contemplating doing the AntiVenom mob check the ball on the end of the detent bolt. Mine was seized up. Worked in some good spray lube I had laying around and freed up the ball so it rolled and depressed easy and reinstalled the bolt. For all I know that was the real reason I hated the shifting of this car.

Shifting C5
 

01 vert with Hurst. Tried the detent and removed it, just never happy with the way it shifts. Just got back from two days at Bondurant in C6 Z06's. It was fantastic! One thing I learned after driving several cars on the track was that the shifting is perfection. The instructor said that the C6 has a whole different linkage setup. Anyone have any information on the C6 setup and instead of us all dealing with a poor design is it possible to convert the whole thing over to a C6 linkage

:toetap::toetap: Your instructor needs to go to the Bondurant C5/C6 mechanic school to learn about C5 & C6 drive trains. The C5 and C6 manual transmission are the same basic design. In 2009, the internals were changed to a T60/60 which has improved synchros but, ALL corvette shift linkages are THE SAME... C5 base, C5 ZO6, C6 base and C6 ZO6

Even the shifter lower boxes are the same between C5 & C6:

http://img.photobucket.com/albums/v4...7/DSCF0056.jpg

The shifter upper (shift lever ) is designed a little different. Its shorter and more ergonomic but not significantly different. It fits right on a C5 shifter base.

This C5 tranny was converted from a C5 ZO6 MN12 to a TRANSZILLA T/60/60 by George @ Rockland. All thats different is the face plate to allow the T60/60 guts to fit. Its going into my C5 ZO6.

http://img.photobucket.com/albums/v4...7/IMG00478.jpg

Thanks for the response. Shifting those C6's was flawless, it was so smooth!

I had the actual Anti venom mod in my car for a year or so. It removed ALL detent. It really loosened up the shifting action. I liked it but I found that every once in a blue moon I would grind going into 4th gear. I could never tell if it was me being lazy, or the shifter. I removed the Antivenom mod plug, and put the original detent plug back in. I drove with it like that for 3 months and the grinding in 4th went away. I think it was because the actual Anti venom plug removes ALL detent from your shifter (shifter was too sloppy). I have since installed 1 copper shim washer (about 1mm or so thick). It has loosened up the shifter a little, and the grinding in 4th is still gone. I'm leaving it like that.

I got a washer like this below.

Super easy too. Jack up the rear of your car. Pull out the detent plug, and put the washer around the plug and reinstall the plug. That's it.

http://i131.photobucket.com/albums/p...AntiVenom1.jpg