Hey fellas, so I'm having some issues and I'm having some trouble figuring it out.

I'm having multiple issues.

When I manually select 1st gear from a stop, it will not stay in 1st. It'll shift to second.

When I'm running 30ish and I manually move the gear selector into 2nd in will not go to second.
Drive and OD work normal.
My hp tuners shows the shifts are commanded.

The shifts are soft and slow. Line pressures are maxed and shift timing is set to minimum. No changes. 1 2 is set at 6200 for it to shift at 6800.
2 3 is a little quicker.


When I rev it in neutral the car moves forward. Like it feels like 0-3mph instant hit.
The traction control light also comes on randomly for a second or two.

I know there's a few things here, and I appreciate any help I can get.
6 months putting this damn this together. I'm so close.
Thanks guys!

 

Does your transmission have the TransGo pressure relief modification done? I hope not.

Some of what you said sounds like the forward clutch is dragging...

And some sounds like you may have a worn out AFL valve-train (very common).
I am assuming when you say: "line pressure is maxed out", that you mean the EPC should be making max line pressure, but in reality it is not.
If the line pressure actually shows low on a gauge... this would be another indication of worn AFL.

 

gotta put a gauge on the pressure port and get actual pressures instead of just commanded.

 

Thanks for the quick reply! I'm sorry I wasn't able to reply sooner. I got 72 hours this week.

To be completely honest I'm not sure. He's got a build sheet for me. I talked to him the other day and he blamed the tuner lol. He said he installed the kit according to the directions. I'll ask him about the relief mod.
Ill order a sonnax AFL (got a correct part#?)

​​​​​​What would cause the forward clutch to drag? Lack of pressure? Clearances to tight? How bad is it?

Would a failing AFL cause my first and second gear issues?

Yes that's what I mean. Line pressure is commanded Max, but obviously not seeing it.
I'll get a guage (suggestions?)

The test port is on the driver's side, above and slightly forward of the gear selector below the front vss. It looks like a plug with a square head on it correct?

I'm learning as I go, which may not be the most efficient and effective way, but it's what I got and working with, so I appreciate the guidance and patience.

 

For the AFL valve, and the entire valve-body really...

You should take the valve-body to a transmission shop, to be vacuum tested for valve-train leakage.
Also if the AFL valve-train needs to be replaced; the valve-body needs to be machined by the transmission shop.

The forward clutch can do this from a seal that is leaking, or cross-leak in the transmission.
Builder error assembling the forward clutch pack/ drum...

 

I wasnt able to get a ride, but I hope this helps.

 

Guess that's my vibration

 

out on a limb, intermediate clutch retainer snap ring switched with the beveled snap ring that goes under the pack. ring slips past the case lugs, and the intermediate pressure plate is playing grab-*** with the direct drum.

i suspect you may see something like this when the direct is pulled.

 

I appreciate the little bit of info on parts playing grab ***. What is the failure probable to happen?

I talked to a guy today out of Lansing that does nothing but valve body stuff, and he says the pressures are doing what they're supposed to be doing. He doesn't feel anything is hydraulically wrong.

He mentioned the neutral safety switch.. Seems to think it's in the tune or electrical.

 

I didn't think anything of the neutral switch.
but at any rate, it wouldn't start in any other gear but park or neutral.

I got some videos during a short drive.

I stayed at the same throttle input throughout the acceleration

I noticed the pressure kinda hang a few times at idle around 90psi then fall back to normal.

I floored it from a rolling idle. It shifted when I slightly lifted off the floor.

 

I forgot to mention. I tried to select first and second gear.
For whatever reason, this time it acted a little different. I started from a stop with the selector in first. It didn't hold first and went to second then drive. When I got to a stop sign I'm almost 100 percent it started in second gear.