think my posi might be on its way out

[JoeliusZ28]

after i parted off from the cruise convoy sunday night i did a little holeshot on a sidestreet and had my cousin record it:

Video

after i initially dumped the clutch and the rpm's began to rise (to about 4800 rpm as seen in vid), i felt the car jerk and the rpm's dropped back down... only to rise back up again. Throughout the entire duration of the first gear holeshot I never feathered the throttle and consistently held it at roughly 2/3 throttle. In other words, I think i may have one-wheeled on the initial launch

Its really hard to even notice in the vid, but there was a definite "clunk" in the car along with a jerk... this being after the clunk + jerk of the clutch being dumped.

Ahhhhhh, i love my money pit

[archemedes]

best way to break parts, and get nothing is a burnout

[JoeliusZ28]

best way to break parts, and get nothing is a burnout

especially when the weakest link in the drivetrain is a 10 bolt... there are several people running 400+ rwhp through stock T56 trans and launching them at 5k on heated slicks and they hold it.

but i think holding the pedal to floor in neutral would be a better way to break things with no benefit

[DETROITMUSCLE]

Those people are damn lucky then. From what I have heard running anything over 400 to the rear on a 10 bolt is just waiting for it to break on anything that can hook. Some get lucky and others don't, just leads to a stronger rear end which is good.

[JoeliusZ28]

Those people are damn lucky then. From what I have heard running anything over 400 to the rear on a 10 bolt is just waiting for it to break on anything that can hook. Some get lucky and others don't, just leads to a stronger rear end which is good.

n-n-no, i meant people had those numbers going through the stock trans... not the 10 bolt. the pos 10 bolt barely handles stock hp #'s on 6 speed cars.

[DETROITMUSCLE]

My bad.

[archemedes]

the t-56 barely handles stock power too (alot of racers won't touch them in road race cars anymore, they are using the viper trans)

[JoeliusZ28]

the t-56 barely handles stock power too (alot of racers won't touch them in road race cars anymore, they are using the viper trans)

the T-56 is the viper trans. the version of the t-56 in fbodies varies slightly from the one used in the viper. I think the trans you are thinking of is the T-5 used in the 3rd gens... that couldnt handle much.

[DETROITMUSCLE]

^ I was thinking the same thing. T-56 is supposed to handle big power including the 500 ponies from the Viper.

[archemedes]

the t-56 barely handles stock power too (alot of racers won't touch them in road race cars anymore, they are using the viper trans)

the T-56 is the viper trans. the version of the t-56 in fbodies varies slightly from the one used in the viper. I think the trans you are thinking of is the T-5 used in the 3rd gens... that couldnt handle much.

even the one in the 4th gen is considered a garbage trans (the viper one may be a t56 but it is not the same)I know about a dozen guys who have scrapped them becasue of the sloppy shifts (gears are way too loose) or from scattering them with under 400 hp (they are about as strong as the pos muncies were wich couldn't handle a stock 455 with slicks)

[JoeliusZ28]

even the one in the 4th gen is considered a garbage trans (the viper one may be a t56 but it is not the same)I know about a dozen guys who have scrapped them becasue of the sloppy shifts (gears are way too loose) or from scattering them with under 400 hp (they are about as strong as the pos muncies were wich couldn't handle a stock 455 with slicks)

the fbody t56 is definitely NOT a garbage trans. there are only minor differences from that of the viper, and by minor I mean things like slightly different gear ratios. Ive never heard anything but praise about the T56, the dozen guys you know must have had lemons.

edit: I just remembered the T56 in the 93 Z28s were cheaper. The ratios werent as good and they were easier to break... chances are everything you heard was about 93 T56s.

[shawnc16]

They use stronger internals in the Vipers T56. If they tried to use the same internals im sure the F-bodies would be another 3-4k more than they were sold for.

[asianice25]

Why are you guys talking crap about our t-56's? and you think theres a better stick trans out there? T-5's are crap. my friend broke his twice and hes barely putting down 200 to the tires. the only difference between the viper and camaro trans' are a caast iron 3-4 shift fork. it can be had for a miniumum price. however, when upgrading the trans (i.e. after you blow it up) you should definetely look into this upgrade, along with some carbon fiber synchros and so on. the trans will hold 450 to the tires on slicks, mind you this is pushing it, but it will work. you need to worry more about the torque arm, anything more than 425 on slicks and you'll probably break the mount right off the trans. its one of te best out there. better than a t-5, t-10, and any other out there. many love 400th for power handling, this is true, they handle the power when built, but autos are for vagina$.

[archemedes]

the fbody t56 is definitely NOT a garbage trans. there are only minor differences from that of the viper, and by minor I mean things like slightly different gear ratios. Ive never heard anything but praise about the T56, the dozen guys you know must have had lemons.

edit: I just remembered the T56 in the 93 Z28s were cheaper. The ratios werent as good and they were easier to break... chances are everything you heard was about 93 T56s.

In every test report of the f body when it's a manual they all talk about how bad the trans is (sloppy shifts is the biggest complaint) they all say it feels like shifting a trans full of jello.Most racers I know are useing an aftermarket since there are no current manuals that do well, and the decent older ones are all over priced.(of course if you drag race you don't want a manual since every time you shift you lose time, which is why the best trans for drag racing is a powerglide)

[archemedes]

Why are you guys talking crap about our t-56's? and you think theres a better stick trans out there? T-5's are crap. my friend broke his twice and hes barely putting down 200 to the tires. the only difference between the viper and camaro trans' are a caast iron 3-4 shift fork. it can be had for a miniumum price. however, when upgrading the trans (i.e. after you blow it up) you should definetely look into this upgrade, along with some carbon fiber synchros and so on. the trans will hold 450 to the tires on slicks, mind you this is pushing it, but it will work. you need to worry more about the torque arm, anything more than 425 on slicks and you'll probably break the mount right off the trans. its one of te best out there. better than a t-5, t-10, and any other out there. many love 400th for power handling, this is true, they handle the power when built, but autos are for vagina$.

I have a friend that broke 3 of the built t-56's in a vega with 300 hp (autos are for guys who don't like losing on the strip, manuals are for road racing, and oval tracks)