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Old 07-19-2019, 02:48 PM   #1
RonSSNova
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Default TH400 blowing fluid out the vent

Customer car, on the dyno.
It has some sort of tractor/hydraulic fluid in it. Customer read that it's the hot ticket.
Twin turbo setup.

This car has the Lokar fancy locking dipstick setup.

Any chance that this dipstick seals too good and the vent is now the only breather?

It's blown enough fluid out that it reads below the dipstick. Yeah, it's that bad.

Ron
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Old 07-19-2019, 04:21 PM   #2
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Default Re: TH400 blowing fluid out the vent

First step is to verify proper fluid level. Full running in Park level is even with the case/pan junction. The only breather is the breather.
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Old 07-19-2019, 05:02 PM   #3
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Default Re: TH400 blowing fluid out the vent

Is the car running nose down or flat on the rollers?
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Old 07-19-2019, 07:41 PM   #4
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Default Re: TH400 blowing fluid out the vent

Pump halves not flat, trans burning up from the dyno or terrible cavitation will be the main culprits.


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Old 07-19-2019, 09:06 PM   #5
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Default Re: TH400 blowing fluid out the vent

I verified it's the correct Lokar dipstick. Frame is in the way to remove the pan to check the calibration on the stick. But I get you, did that calibration on my own car.
Car is nose down on the chassis dyno......I hate that about our dyno. I have tuned many, but the only other TH400 car had no issues. Although it had massive issues at the track because the case was not cut correctly for the ultrabell and the pump gasket never sealed. Guess where the fluid escapes!

Hutch, it did this at part throttle stuff low load. Did it more on pulls, but I've only made a couple.

Ok, yet another issue with this not ready for prime time car...….

Thanks guys.

Ron
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Old 07-19-2019, 09:19 PM   #6
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Default Re: TH400 blowing fluid out the vent

If there's any kind if kink in the vent tube it will burp out the vent.
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Old 07-20-2019, 06:48 AM   #7
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Default Re: TH400 blowing fluid out the vent

Is it the Lokar stick that is grey plastic , they are near impossible to get an accurate reading
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Old 07-20-2019, 05:21 PM   #8
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Default Re: TH400 blowing fluid out the vent

Quote:
Originally Posted by RonSSNova View Post
I verified it's the correct Lokar dipstick. Frame is in the way to remove the pan to check the calibration on the stick. But I get you, did that calibration on my own car.

Ron
Run the stick down outside the tube. Make a mark.
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Old 07-21-2019, 09:08 AM   #9
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Default Re: TH400 blowing fluid out the vent

...
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Old 07-21-2019, 09:15 AM   #10
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Default Re: TH400 blowing fluid out the vent

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Old 07-21-2019, 03:34 PM   #11
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Default Re: TH400 blowing fluid out the vent

Quote:
Originally Posted by Gregaust View Post
Is it the Lokar stick that is grey plastic , they are near impossible to get an accurate reading
No, itís the locking unit and the stick is a metal cable with the end that contains marks. It seems real easy to read.
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Old 07-21-2019, 03:35 PM   #12
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Default Re: TH400 blowing fluid out the vent

I’ll check the vent tube.
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Old 07-21-2019, 03:37 PM   #13
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Default Re: TH400 blowing fluid out the vent

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Originally Posted by Detroit Gearbox View Post
Thatís way to long!
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