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Where did it go?

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Old

Oct 6, 2022 | 07:07 AM

#1

Lincoln05

Thread Starter

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5th Wheeling

Joined: Mar 2018

Posts: 31

Likes: 3

Where did it go?

Had my 2017 CCSB 6.2L in for service due to difficulty shifting into drive. It would shift, go 10-20ft, and then the transmission would lock up to a skidding stop in 1st. Otherwise shifted fine once I got going.

Transmission was down 3 quarts. No sign of a leak anywhere. I park in a garage and not a drop of fluid to be seen. Checked the transfer case to confirm it wasn’t full of fluid (bad input shaft seal), and nothing….

I’m stumped. Any thoughts?

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Old

Oct 6, 2022 | 07:16 AM

#2

cpobst

Cargo Master

Joined: Oct 2019

Posts: 2,831

Likes: 1,187

From: Southeast MO

I hate to ask a dumb question but has it been serviced before and do you know if it was ever filled to the proper level?

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Old

Oct 6, 2022 | 07:21 AM

#3

Lincoln05

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5th Wheeling

Joined: Mar 2018

Posts: 31

Likes: 3

Good questions. I’m at 55k. Never had the transmission serviced. The last time I had checked the fluid it was probably around 30k. All was good then. I bought it new with 20 miles on it in 2018.

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Old

Oct 6, 2022 | 08:09 AM

#4

Joe T

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Joined: Mar 2017

Posts: 10,150

Likes: 1,369

From: Chaz

I had a dodge that did that. Perplexing but maybe it had a small leak on the top. Would use a little fluid between oil changes.

The cooler isn’t in the radiator so that isnt a point.

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Old

Oct 6, 2022 | 08:34 AM

#5

redford

FTE Leadership Emeritus

Joined: Sep 2000

Posts: 23,174

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From: Stephensville WI

Club FTE Gold Member

Either you have a transmission fluid leak that you haven't yet detected, or your transmission has an internal black hole that is eating your fluid.

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Old

Oct 6, 2022 | 08:38 AM

#6

Grass Lake Ron

Cargo Master

Joined: Nov 2020

Posts: 2,073

Likes: 1,027

From: Michigan

Quote:

Originally Posted by redford

Either you have a transmission fluid leak that you haven't yet detected, or your transmission has an internal black hole that is eating your fluid.

My grandfather had a 2+2 that did the same thing with oil. No leaks, no burning....just ate it.

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Old

Oct 6, 2022 | 08:53 AM

#7

redford

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Joined: Sep 2000

Posts: 23,174

Likes: 1,678

From: Stephensville WI

Club FTE Gold Member

Quote:

Originally Posted by Grass Lake Ron

My grandfather had a 2+2 that did the same thing with oil. No leaks, no burning....just ate it.

Pontiac 2+2? Wow, one of my dream cars is a 1965 2+2.

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Old

Oct 6, 2022 | 08:59 AM

#8

Grass Lake Ron

Cargo Master

Joined: Nov 2020

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From: Michigan

Quote:

Originally Posted by redford

Pontiac 2+2? Wow, one of my dream cars is a 1965 2+2.

Yes a Pontiac 2+2 in black. 421 tripower.

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Old

Oct 6, 2022 | 10:25 AM

#9

Sport45

Cargo Master

Joined: Apr 2003

Posts: 2,058

Likes: 424

From: Too close to Houston

The engine could eat the ATF in the older cars when the vacuum modulator leaked. Nowadays it’s hard to imagine the fluid disappearing without a trace. Even if it was puking out the vent you’d see the trails.

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