So I finally fix my crank case pressure issues, and get the car dialed in on E85 at 30psi, and then I blew my transmission. I was doing a pull in 4th gear and the car started to free rev and I heard a whirring noise. I pull over no leaks, no smoke. Car drives fine but free revs 4th gear and reverse doesn't engage.

Transmission was built by previous owner. 2g auto with IPT performance rebuild kit with 5 friction front clutches. Two coolers (stock and 1 from IPT). 9.5 Billet converter. I added a Metro lab valve body and Forced Four Shift box. I have been driving the car for months without any transmission problems until last night.

I have heard of end clutches going and causing free rev in 4th but never heard of them affecting reverse. Could I have possible blown something else?

I got the Alto end clutch kit in. The steel plates are thicker and stronger than Raybestos. I assembled everything just like the IPT video. Replaced all the seals too. I have not taken the car for a drive yet. But I can tell just from shifting into reverse there is ZERO load. 1,2,3 all have load. 4th I hear whrring noise coming from end clutch area and also no load.

When I drained the fluid it was clean.

What is causing the no 4th and no reverse??

I have to ask, why were you doing a pull in 4th gear? I think that most people who race autos don't even shift into 4th at the end of the 1/4 mile because 4th gear is so week...
I thought that changing the end clutches would have solved your 4th gear issues but it might be something internal, especially considering no reverse. Have you contacted ipt about this? They might be able to give you some good advice...

When you installed the apply piston into the clutch basket, was the piston fully seated? If not, you might have pinched that outer o ring and now could have a leak. I know I had to work that piston down quite a bit to get it to fully seat into the bore.

I did a quick 4-5 pulls in 4th just to see how the new boost setting felt. I didnt get above 100mph. Yes I made sure the piston was fully seated. With the alto kit everything must be seated because the steel plates are thicker than raybestos and stock plates.

Whats the fluid level like? Did you check the pan for any shavings? Reverse uses the Front Clutch and Low-reverse brake. It may be something clogging the VB. I would suggest doing 2nd to 3rd gear pulls.

I have to second the question, why the heck was 4th gear seeing power? 2nd person I know in a week to blow a trans doing that.

Overdrive is a very weak gear, one shouldn't do pulls in that gear it will quickly burn out again. We never do pulls in overdrive in the auto car we have. Just sayin.

The fluid is brand new. When I drained the fluid it came out red, not burnt, very little debris in fluid. A few of the end clutch disc were burnt and friction material missing.

I think all forward gears use the front clutch. The car drives in 1st, 2nd, and 3rd. If reverse uses the front clutch and reverse brake. I guess the reverse brake could be bad, but still wouldn't explain the no 4th gear.

I will drop pan and take pictures of valve body and filter.

Another thing. When I removed the end clutches and 4th gear, a splined shaft that slid over another splined shaft was lose. Is this by design?

Here is what my end clutches looked like. Noticed the clutch material is gone. The steel plates have burn spots and are slightly warped.

I still have not figured out my no reverse and no 4th gear. I have to drop pan to inspect.

"D" (Drive) 1st Gear .................. Rear Clutch & One-Way Clutch
2nd Gear ................... Rear Clutch & Kickdown Band
3rd Gear ........ Front Clutch, Rear Clutch & End Clutch
4th Gear .................... End Clutch & Kickdown Band"2" (Second)
1st Gear .................. Rear Clutch & One-Way Clutch
2nd Gear ................... Rear Clutch & Kickdown Band"1"
(Lo)1st Gear ............... Rear Clutch & Low-Reverse Brake"R" (Reverse) .......... Front Clutch & Low-Reverse Brake
"N" Or "P" (Neutral Or Park) .......... All Clutches, Brakes & Bands Released Or Ineffective
This might be helpful.

Would a broken input shaft cause this?

Which end of this shaft goes towards the transmission and which end goes towards the end clutches? I think this shaft is called the overdrive shaft or end clutch shaft.

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The long splines go towards the front of the transmission/pump . The short splines are towards the OD clutches. There's also a bushing inside that shaft. If it wears out, that would cause a loss of pressure and od.

I don't remember ever seeing a bushing. I see splines on the inside where it engages the input shaft. Do the holes on the overdrive shaft have to line up with the holes on the input shaft? I assume fluid goes thru these holes.

Here's a link to the overhaul manual. It will answer all your questions. There is a bushing inside that shaft.
http://atdsm.com/tech.html

The manual is clearly marked.
Ipt covered that shaft and bushing in a YouTube video. Just search ipt there and he has a ton of information in them.

Pages 24 and 25 (fig18-19) of the overhaul manual shows the shaft but doesn't mention a bushing. judging from the picture the short spline end goes into the transmission like you previously stated. I will check the IPT videos.

Transmission is toast. Time for a rebuild or replace with a another built unit. Took pan off and found this:

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Dang, that sucks. If you need hard parts, the fwd shares quite a bit with the awd unit. Almost everything from the pump back to the transfer gears.

Thats nice to know. I plan on letting somebody else to the rebuild. I can remove and install. Swap valve bodies and 4th gear clutches i can do, but going inside.....I will leave that to somebody that has done a few before.

Just an update. The gear set is destroyed. Clutches appear to be fine.

A few things happen to the tranny which could have caused this.
1- tow truck towed AWD auto car for 45 miles with the rear wheels on the ground (I did sue them but I lost, at least the driver was fired)
2-upshift\downshift are wired to button on steering wheel. They constantly had poor connect and often didn't work (steering column isn't a good ground). Car shifted from 3rd to 1st and wheels locked for a split second then released. Car drove fine for a week until doing pulls in 4th and then boom. 4th gear steels were warped but not enough to cause no 4th and no reverse.

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I would say it was probably the tow truck and the 1st to 3rd shift. That's a lot of torque on those gears.

Should be running before Christmas. My transmission's gear set was toast. It was cheaper to just swap over my valvebody and end clutches to a spare transmission. Went head and upgraded to Kiggly front cluthes, spare differential welded. All done by Rix Racing in West Virginia

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Transmission is performing great.