BadAss SRT-Z - 2.4L / A568 - Update!!!

[moparjon2007]

Hells yeah. Take the Shadow to the RSDs with the "Boom" nitrous kit... I'll bring the CSX and we can leave the motors there

[BadAssPerformance]

LOL... No RSD this week, too much stuff to do before the gathering this weekend.

As for the next trans... I have a couple A568's, anyone got some good selection criteria?

No, I do not want to take them all apart, so it will be from the outside. When I select one, yes it will come apart. They all were runners when pulled, none of them have particularly low miles, think one from Jackson has really high miles but he said it was one of the nicest shifting he's driven... Thinking about looking at:

-Input shaft spline wear
-Input shaft end play
-rotational torue
-rotate in each gear, listen for noise

[Reeves]

I'd take them both apart and use the best pieces of each.

[16valvecharger]

just put in a automatic and go really fast

[Pat]

just put in a automatic and go really fast

Or accept that calling it an unlightened street car with busted transmission is less fun than lightening it, going faster and calling it a race car that works. :-)

[Shadow]

Or accept that calling it an unlightened street car with busted transmission is less fun than lightening it, going faster and calling it a race car that works. :-)

Oh no you di'en't!

[Pat]

Oh no you di'en't!

Couldn't resist! LOL!

[BadAssPerformance]

I'd take them both apart and use the best pieces of each.

Thought about that...

just put in a automatic and go really fast

I'm sure it would go faster, but I like rowing... would be bored driving an auto unless it was Slowe-Fast™ (yes, just TM'ed that )

Or accept that calling it an unlightened street car with busted transmission is less fun than lightening it, going faster and calling it a race car that works. :-)

Ouch! LOL... Yeah, this coming from the guy that called me out before SDAC-22 like he was gonna dish it out and even tho my heavy street car only made one pass, it was still quicker than his race car

[Pat]

Ouch! LOL... Yeah, this coming from the guy that called me out before SDAC-22 like he was gonna dish it out and even tho my heavy street car only made one pass, it was still quicker than his race car

Ha ha...I admit, you were screaming your first pass but I was definitely quicker on the 2nd pass!

[BadAssPerformance]

Ha ha...I admit, you were screaming your first pass but I was definitely quicker on the 2nd pass!

LOL, yeah, if we raced heads up, you MAY have one unless some bits from my drivetrain hit you or your car

[Pat]

Joking aside, did you tear apart the most recent trans failure? Any idea on what gave out? At the rate your popping transmissions, I fear that the weight/torque has found the useable limit of our manuals and that without identifying the failure point and strengthening it, you'll be doing the same thing next run on a sticky track.

[BadAssPerformance]

Yeah, it would be good to know what broke...

Ya know, this thing was noisy evertime I drove it anywhere, had a stright cut gear kinda whine to it and having been apart so many times, I'm surprized it lasted this long.

[Shadow]

I think this is like Reeves, when he cracked the case in half. (maybe more than half even) Everyone was thinking this was "the limit" I was just thinking he wore out the trans. lol

JT, when you pulled the trans apart where you just fixing what you saw and back together, or were you checking all tolerences ect every time it was apart?

[BadAssPerformance]

I think this is like Reeves, when he cracked the case in half. (maybe more than half even) Everyone was thinking this was "the limit" I was just thinking he wore out the trans. lol

Which time? when the gear teeth fell off the 525 gears (root cause) or the time before that?

JT, when you pulled the trans apart where you just fixing what you saw and back together, or were you checking all tolerences ect every time it was apart?

Nope... LOL no tolerances or torques measured. Running on hopes and dreams!

This last time with reverse, pulled it all out the end (in the car) emptied 2 cans of brake cleaner to clean it out and till I saw clear come out the drain hole.

Put in different input shaft, reverse idler, reverse/3/4 slider, bearing plate (with used bearings that were in it), bearing back up plate and bolts. Input shaft felt tighter than one that came out...

Swapped my original bronze fork pads out and Lengel's new ones in.

Sight unseen, my thought on a potential root causes... input shaft fragged, or didnt get all the teeth out of it from reverse, one got sucked into the wrong spot

[shackwrrr]

Pull the top off and look at the dog teeth.

[Shadow]

Nope... LOL no tolerances or torques measured. Running on hopes and dreams!

This last time with reverse, pulled it all out the end (in the car) emptied 2 cans of brake cleaner to clean it out and till I saw clear come out the drain hole.

Put in different input shaft, reverse idler, reverse/3/4 slider, bearing plate (with used bearings that were in it), bearing back up plate and bolts. Input shaft felt tighter than one that came out...

Swapped my original bronze fork pads out and Lengel's new ones in.

Sight unseen, my thought on a potential root causes... input shaft fragged, or didnt get all the teeth out of it from reverse, one got sucked into the wrong spot

Right, so I'm thinking just well used tranny. Not saying the heavier Tona isn't wearing them out faster, I'm sure it is, just don't think they're done yet (more hoping than thinking as always)

Gotta say I'm blown away by how well these trannies stand up so far, specially the input shafts! (knock on wood)

[16valvecharger]

or accept that calling it an unlightened street car with busted transmission is less fun than lightening it, going faster and calling it a race car that works. :-)

oh snap!

[BadAssPerformance]

Right, so I'm thinking just well used tranny. Not saying the heavier Tona isn't wearing them out faster, I'm sure it is, just don't think they're done yet (more hoping than thinking as always)

Gotta say I'm blown away by how well these trannies stand up so far, specially the input shafts! (knock on wood)

Yeah, I'm hoping they are not done yet either!

[turboshad]

I should be able to add something to the pot next year as I expect the power to jump up quite a bit with the new snail. I would be interested to see what broke JT. From most of the failures I've seen I've come to the conclusion the most damaging part of the tranny are the helical gears trying to move the gear set axially. I've been thinking of some possible ways to make a "girdle" so to speak and stiffen up the outer bearing plate but it's still early. As for mine, small spline and missing half the synchro teeth but no where near the passes you have.

[Reeves]

From most of the failures I've seen I've come to the conclusion the most damaging part of the tranny are the helical gears trying to move the gear set axially. I've been thinking of some possible ways to make a "girdle" so to speak and stiffen up the outer bearing plate but it's still early.

Totally agree. I'm bending the bearing retainer plate at the end of my 555 because of this helical gear unwind. It's bending it enough that it actually is causing it to have a memory. I can set my input shaft preload, race a few times, take it out and the input shaft will need .010" to .020" or more shims to set the pre-load again. At first, I was straigtening the plate and re-installing, but now I decided to leave it bent.



I'm trying to source a 40 rockwell plate or so to try out. Something less bendable, but hopefully not too hard that it breaks.