Update on the cracked flexplate....

[95TwinTT]

Update on the 4L80e, leaking torque converter seal…

After discovering the cracked flywheel and grooves worn in the TC collar, had caused the seal to leak. My trans tech, needed to know why. He found the trans case itself was distorted by 35 thousands. That caused the stator spline to wear out.

Thanks to the experts at Midwest Performance Converters, I now have a new stator, a new collar welded to the turbine and while they had it apart, they adjusted my stall speed up a few hundred rpm’s.

The new transmission case will keep it all from happening again, and the bonus is a lot more torque from the billet torque converter, with the higher stall speed.

Now I need to find some tires with better traction. These 285/55R18 tires are not a popular size.

For anyone considering replacing their TC, I would strongly recommend these guys over just buying a “cookie cutter” off the shelf torque converter.

 

[clean454]

damn bro
well i hope that ur new set up will be good to go!

 

[AtomicHoe094]

thats pretty intense. how wide are those 18inch rims? and no traction in 2wd or 4wd?! lol

 

[95TwinTT]

The rims are 9” wide. They look good with the 11” wide tires.

The front drive shaft was not back in the Tahoe, for the initial tests, so I have yet to test with four wheel drive.

What I did discover is the stall speed is now high enough to be into the “turbo chain reaction”. I need to test to see what works best for launching rpm wise and set the second rev limiter. The trans brake switch can be modified to set the rev limiter along with the brake.

I don’t know if the front differential can take a “balls to the wall” launch off the trans brake. I tried one launch at 3500 rpm’s in two wheel drive and it just smoked the tires through first and second until I ran out of road and had to get off it.

I need to try to find a set of M/T drag radials the same diameter as the 285/55R118’s. lol

I’m just putting it back up on the hoist right now to go over all the bolts and connections to make sure all is secure.

 

[AtomicHoe094]

haha wow. damn thats crazy. have you ever had a good launch/time slip from the quartermile? those 285s dont rub in the front or rear?

 

[95TwinTT]

The 285’s have been fine except when hitting sever bumps, like bad rail road crossings at speed. Then the front’s would rub the top opening of the fender when the wheel would bottom out, on the outside of the tire wall. I messaged the top inside of the fender openings with a big rubber hammer and the problem seems to be gone. Also increased the size of the “bump stops” for additional safety.

The agressive alignment could help keep them from rubbing too. I have the camber setup so the tires lean in at the top a little. Helps in cornering.

The current setup has not been down the strip yet. I hope to get to Cedar Falls this summer sometime. It’s a little over three hours away, so it takes some planning.

Meanwhile I’m about to put new tires on it, so I may get out the video camera and finish off the existing Michelins. lol

 

[AtomicHoe094]

3 hours? that sucksss. and sounds good to me! ill video tape if youd like. haha damn, i need some 285s for the fbody. ahh

 

[95TwinTT]

What F-body? What's the story?

 

[AtomicHoe094]

haha the 01 formula, cant hook up in these 245s worth shit! lol damn firestone garbage tires.

 

[95TwinTT]

01 Formula, that’s a nice ride. Your right, aside from bigger tires and or drag radials, it’s a problem.

The one change I found on my f-body that made the most difference for traction, was adding the “BMR anti squat brackets” to the rear.

They change the leverage of the rear suspension to lift the front end, instead of squatting in the rear. Sounds silly but they really work. Not that much money either.

How about posting some pictures of the Formula?