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The oil seal between the engine and transmission is leaking?

Tiny
ALEXBEL
  • MEMBER
  • 2012 CHEVROLET EQUINOX
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 55,000 MILES
There has been a dripping oil leak at the engine rear main bearing oil seal for a long time. I am not located in the USA. To fix the leak, I may need to remove the transmission assembly. Could you give me a list of disassembly steps to replace the rear crankshaft oil seal and then reassemble? I would also like to know if it would be advisable to change the filter and oil in the transmission at the same time.
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Friday, April 7th, 2023 AT 6:54 AM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

As far as servicing the transmission, it may be easier to do it when everything is together. However, you can certainly do it when it is removed.

The rear main oil seal isn't difficult to replace once you have the transmission, torque converter, and flex plate removed. If you look below, I attached the directions.

Let me know if this helps or if you have other questions.

Take care and Happy Easter,

Joe

See pics below.
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Friday, April 7th, 2023 AT 10:55 PM
Tiny
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Are you sure you have to remove the engine? About the transmission (6T70) it seems that the filter is inside the transmission and there is no oil pan. VIN 2GNFLNE54C6340967.
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Saturday, April 8th, 2023 AT 1:39 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

No, you don't remove the engine. However, to access the seal, the transmission and engine need to be separated.

Let me know.

Take care and Happy Easter,

Joe
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Saturday, April 8th, 2023 AT 6:52 PM
Tiny
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  • MEMBER
  • 65 POSTS
I can of course disassemble without help. However, it would be nice to have help in the form of advice on the sequence of operations when removing the transmission.
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Saturday, April 8th, 2023 AT 7:08 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

I will do my best to help if you have questions. Please understand, this is a big job. Also, doing it without a rack to lift the vehicle will make it a bit more difficult.

As far as special notes are concerned, you will need an engine support mount to hold the engine in position while you do the work. Also, the front suspension frame will need lowered.

I attached the directions below for the removal and replacement of the transmission. Note that the directions are if you are replacing it. That isn't the case, but these are the only directions in my manual that have the procedure.

Let me know how things turn out for you.

Take care,

Joe

See pics below.
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Saturday, April 8th, 2023 AT 7:55 PM
Tiny
ALEXBEL
  • MEMBER
  • 65 POSTS
I am not in the United States. Here, where I am, there are no such cars. However, there are service stations with elevators where other cars are serviced. I am not going to do the repairs myself. However, the handyman who will be doing the disassembly and reassembly will be helped by the information you gave me. Thank you very much.
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Saturday, April 8th, 2023 AT 8:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

No problem whatsoever. If you have a chance, let me know how things turn out for you.

Take care of yourself,

Joe
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Saturday, April 8th, 2023 AT 10:20 PM
Tiny
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OK.
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Saturday, April 8th, 2023 AT 11:06 PM

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