Transmission Pan Question

[Apoc Bane]

Hello,

5-2 of the TM says:

NOTE
Transmission oil pans ridged lip will have
a transmission oil pan gasket (11).

Transmission oil pans (2) with a
flat lip will have RTV sealant.


I think I have a flat lip, so only RTV? I'm not sure.

When I removed the pan, there was a seal and RTV.

Transmission pan was leaking, hence the removal.

Thank you.

 

[Cucvnut]

you can use either. i just use a gasket

 

[DXTAC]

Mine was flat. It was leaking as well so I removed it and applied the RTV properly and 5,000 miles later no leaks from the pan. The front pump seal went south on me though so I decided to have the whole thing rebuilt. It's in getting done now and should be done by the weekend.

 

[Buzz]

20 years ago at Gm dealers, if you had a ribbed pan you used the hard black fiber type gasket, if you had a flat pan you used a cork gasket. Cork sucks, its not very durable. Whichever you go with wether Gasket or RTV I would torque the pan bolt to whatever specs the TM says

 

[kassim503]

Im sure the TM covers this, but it is ESSENTIAL that you torque the bolts in sequence to prevent any leaks later on.

Also, I would be really weary about using excess amounts of rtv on the pan of a transmission, with filters that have the same micron rating as my sliding door screen, they seem to be a bit touchy of having anything floating around in there.

 

[Apoc Bane]

Thank you for the responses.

The TM seems to make a distiction on wither you have a flat or a ridged pan.

I can't seem to tell wither mine is flat or ridge. I think it is flat. Which by the TM requires RTV not a gasket.




Uploaded with ImageShack.us

Does that look flat or ridged?

 

[Apoc Bane]

Better pan pic, click on the link and image to enlarge. thank you.

ImageShack® - Online Photo and Video Hosting

 

[Apoc Bane]

Im sure the TM covers this, but it is ESSENTIAL that you torque the bolts in sequence to prevent any leaks later on.

Also, I would be really weary about using excess amounts of rtv on the pan of a transmission, with filters that have the same micron rating as my sliding door screen, they seem to be a bit touchy of having anything floating around in there.

Thanks for the reminder to check.


"Install transmission oil pan (2) with 13 transmission oil pan screws (5). Evenly tighten screws to
125-160 lb.-in."

 

[original]

Also, I would be really weary about using excess amounts of rtv on the pan of a transmission, with filters that have the same micron rating as my sliding door screen, they seem to be a bit touchy of having anything floating around in there.[/QUOTE]

Use the gasket. Just a small amount of rtv can ruin a trannsmision. Use the gasket. It will seal.

 

[Apoc Bane]

Ok guys, Ill just use the gasket.

Store Locator | NAPA Online

 

[rnd-motorsports]

use a good gasket stay away from only rtv!!!

 

[Barrman]

Another good thing to do on thin metal pans such as the trans and engine oil pan. Is to set them on a wood surface, put the round end of a ball peen hammer on each bolt hole and then hit it with another hammer. This flattens out the hole and will let the bolts actually hold the pan up as high as it is supposed to be.

 

[Apoc Bane]

Another good thing to do on thin metal pans such as the trans and engine oil pan. Is to set them on a wood surface, put the round end of a ball peen hammer on each bolt hole and then hit it with another hammer. This flattens out the hole and will let the bolts actually hold the pan up as high as it is supposed to be.

Thank you, that's good advice.

 

[Apoc Bane]

I just used the new rubber gasket and a torque wrench on the bolts (140lbs). The transmission pan is leaking.

 

[Warthog]

I just used the new rubber gasket and a torque wrench on the bolts (140lbs). The transmission pan is leaking.

140 lbs????

Was that ft pounds or inch pounds?

 

[Barrman]

I think that is way too tight. Yep, just looked in the -20. 125-160 INCH pounds. You did FOOT pounds didn't you? Goint that tight normally breaks all the bolts off and if they don't break, the pan is bent. Time to pull it back off, use my hammer trick listed above and put it back on looser.

 

[Apoc Bane]

140 lbs???? or was that inch pounds?

pounds per inch

Install transmission oil pan (2) with 13 transmission oil pan screws (5). Evenly tighten screws to
125-160 lb.-in. (14-18 N•m).

 

[Apoc Bane]

This is the wrench I used.

Amazon.com: Michigan Industrial Tools 1/4" Drive Click Torque Wrench 20 - 200" lb: Home Improvement
" Torque Range: 20-200 Inch/Lbs"

I set it to 140. No bolts broke.

 

[Warthog]

Just verifing.....Some people don't know the difference between ft/lbs and in/lbs

Sounds like the pan lip is bent.

 

[Apoc Bane]

When shopping for a new pan. Do I have to find one with a thm400 application listed, or will one that says th400 work? I kinda assume the pan is the same on the models, but you know what they say about assuming.