DodgeRam.org > Main > Tech > Maintenance > Fluid Change

Auto Transmission fluid, gasket,
and filter change notes

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Replacing the 47RH oil pan with a pan from a 727 Torqueflite


See the  Fixing Four Speed Transmissions page for more AT information and a page of Chrysler car transmission fluid change tips.

Subject:      Re: [RAM] A. Trani Gaskets and Sealant
Date:          Sat, 28 Mar 1998 01:31:07 EST
From:         Drdonnelly <Drdonnelly@aol.com>
To:             RTML

Don't put anything on the filter gasket.  I used to use Permatex #2 on the pan gaskets, but with the Mopar Perf. rubber gasket, use a little tranny fluid. some trannies like for the fwd 4 cylinder, there is no gasket, and you just use a film of orange or red RTV.  With the "cushion" of a cork gasket, I have had good results with RTV on the gasket, and it was a little better than permatex for me.  If the pan is not stiff (thick steel), RTV alone may not work too well, and the gasket helps.  For example, engine oil pans have not sealed well for me with just RTV, but oil pans have sealed OK with RTV on the cork gasket and on the rubber end seals.  I did have to retighten them a couple times until they took a final "set."
 
Subject:      Re: [RAM] A. Trani Gaskets and Sealant
Date:          Sat, 28 Mar 1998 08:11:37 -0800
From:         "CRAIG C. SCHOLL" <SCHOLL@stic.net>
To:             RTML

     Don't put sealant on anything!  I can't understand why people want to use a "gasket maker" and a gasket.  Use one or the other, preferably a quality gasket.  Fel-Pro released some numbers a while back relating to gasket failures (Automotive Rebuilder).  90 some percent was related to applying a foreign substance to the gasket.

Most important:  Re-torque the pan to 17 N.m (13 ft.-lbs.).  Use a star pattern, and pull the bolts down in two increments.  Bring them all down to 10 ft.-lbs. and then pull the last 3. This is far for accurate, as it is less likely to give a false reading.

If your changing fluid, it must be 25,000 miles.  You need to make your front and rear band adjustments.  The rear band adjustment can only be accessed with the trans pan off.  If you think you want to attempt this yourself, you will need an accurate inch pound torque wrench and your VIN run to find out if you have a 46RE or 47RE.  Adjustments are different for each trans and each year.

Craig Scholl

Subject:      Re: [RAM] A. Trani Gaskets and Sealant
Date:          Sat, 28 Mar 1998 18:35:29 -0700
From:         Mikie <mbeatty@worldnet.att.net>
To:             RTML

Ron Stitt wrote:

> Date:         Sat, 28 Mar 1998 16:20:25 -0500
> From:        "Ron Stitt" <ronstitt@gate.net>
> To:             RTML
>
> I dropped the pan on my auto tranny when I added the temp probe to the pan.
> Didn't use anything. Just a new cork gasket.  No leaks at all. I don't recommend
> using anything.
 

I agree with this.  I have found that using RTV on cork gaskets can cause them to "squeeze" out from the sealing surface.  Makes them real slick.

--
Mikie
 



Replace the 47RH drain pan with a 727 Torqueflite pan.

Subject:   RAM Auto Trans Rams
Date:       Sun, 17 Nov 1996 18:09:21 -0500
From:      Tim Sielski <tsielski@ids2.idsonline.com>
To:          RTML

If anyone has changed the auto trans fluid on their Ram and have either had to clean the mess from some spilled fluid as you balance the full oil pan before you can pour it in to a drain pan or (worse) gotten a face full of clean tasting ATF, the following may be of interest:

While at a local Dodge parts counter, I was asking to find the price of a new oil pan for my 47RH trans, with the intent of adding a drain plug to it, to make fluid changes that much easier.  During the discussion, the parts guy noticed that the oil pan gasket for the 47RH was the same part number as that for the legendary 727 torqueflite.  I knew that Mopar performance has always listed a deep trans oil pan (with drain plug) for the 727 and asked the parts guy to compare prices between it and the replacement stock 47RH pan.  Well, the difference is $12 (more), and to keep things short, the Mopar performance pan fits and works great.  It holds just a little more fluid than the stock 47RH pan AND has the benefit of a drain plug.

The Mopar performance pan comes as a kit with a oil pickup extender for the old 727.  This is not needed for the 47RH, as the filter mounting and valve body extend lower than the torqueflite.  Differences between the two pans from a cursory observation:  The stock 47RH pan is 2" deep in the front, deepening to 2 1/2" at the back, with a real shallow area just under the fill tube.  The Mopar performance pan is 2 1/4" deep uniformly.

I didn't ask the parts guy to compare part numbers for the 46RH trans oil pan gaskets with the 47RH & 727, as I don't have one, but they may be the same as well.

Anyone with a 2500HD with either a Cummins or V10 with an automatic trans who does their own maintenance may find this worthwhile.  I did.  Cost is $60 from your friendly neighborhood Dodge parts counter.

Tim Sielski
95 2500HD Cummins


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