Trans vent relocation

Went to install CSI trans shield and it is obstructed by the trans vent,
Would you notch the shield or relocate the vent?
The front pump vent is still there are 2 needed?

Thanks, John

Plug your vent. Relocate it here;
Doug

On my 904 I pluged the front vent. Then I added the new vent hole near the front of the tail housing. I found that I also needed a hose with a puke tank

Modifying the shield will keep it from recerting if you had any interest in that.

I have a shield on mine and I have the vent in the tail housing near the speedometer drive.

You shouldn't need 2 vents and you shouldn't need to relocate the vent from the front unless you are running a trans brake. We installed our vent in the top of the tail shaft housing near where it meets the case and ran a rubber hose up to a vented puke tank. This way if it pushes fluid out the vent into the tank it can drain back down into the trans

That's how mine is done.

I like that location (from the Griner instructions), and have used it successfully.
I also ground a little drainage in the rib below the new vent (yellow arrows).
Some cases have better or worse relief in this rib for drainage.

I plugged the original vent and moved mine to the tailshaft housing, just behind the park gear and down on the side a little. I used a brass 90° with a 1/8 npt male on one end and a 1/4" tube flare nut on the other, then bent a short piece of tube that points to the ground. I also fabricated a little shield that attaches inside the case with a couple small screws to prevent any splash from coming out the vent tube.

Looks easy enough to do.

Thanks guys.

I do have a brake, so your saying I should plug the front vent?

I plug the pump on any race unit and relocate it there. Drain is a good idea. The rear support covers most of that area to help prevent oil from blowing out, I use the plastic rearend type vent with the cap. Never had one leak or blow oil out.

Cutting that shield will void the certification, and weaken it.

same here vented to the tank located in the truck. overflow catch can.

Yes. Plug the front vent and relocate to the rear.

Dumb question time...can the relocation drilling/tapping be done to an already built transmission like OP's (or mine), or should the case be stripped beforehand??

I've drilled aluminum stuff before using a vacuum cleaner. But in this case removing the tail shaft housing is a 5 minute deal. With it removed you can drill without issue. Make sure to stay forward of the gasket surface. When you drill, it will drill into the forward wall. Drill deep enough into the wall to get the tap down about 1/2"
Doug

I do have a brake, so your saying I should plug the front vent? [/quote]

Yes. Plug the front vent and relocate to the rear.
[/quote]


Ok. Great.
Thanks all for the info.

John.

https://www.summitracing.com/parts/vpe-2669

I run this style fitting on my vent for my puke bottle

We'll I didn't get to far with the CSI shield, the strap that wraps around the trans body interfers with the shift linkage and nss.

Has anyone else used this shield? How did you secure yours?

I don't know what shifter you have but my strap goes between the NSS and the linkage bracket. I use a turbo action cheetah shifter. Its a little bunched up in there but it works. Unfortunately due to my exhaust system that area is impossible to photograph, I can't even tell you what it looks like just what it feels like LOL.

I see from your original photo you have a different shifter from me and your trans has had been modified in that area.

The blue lines are the area of your trans that have been removed which is where the turbo action shifter linkage bracket attaches, the red area is where my strap squeezes through. Like I said not ideal but I am able to tighten the strap no problem it is just a little jammed up in that area.

I will be using a Hurst quarter stick. Actually the trans or shifter have never been used or installed. I haven't gotten around to looking at the mounting bracket for the shift cable. ( I may have more problems....lol).

Bad340fish - Do you have the same shift lever?

Off the top of my head I think the arm sticks out further from the trans.

(Bad340fish) I found a longer shift bracket and with bunching the strap up some it looks like it will work.

Thanks all for your suggestions.

Regards,
John