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transmission pan cast aluminum vs stamped steel #2522904
07/17/18 12:15 AM
07/17/18 12:15 AM
Joined: Dec 2008
Posts: 125
montreal,quebec
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mopar12345 Offline OP
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mopar12345  Offline OP
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montreal,quebec
Hi all,
So it looks like i'll have to remove the transmission from my car sometime soon as now 2 of the 4 torque converter bolts have stripped so a new torque converter is on the list. Most likely a tight 4200-4800 converter from what i have spoken to converter builders.
Added to that is a stubborn transmission leak and adding a better cooler and PTFE lines to and from transmission.
Looking for opinions on the following questions
How much extra capacity should i be looking for?
Should i just buy a stamped steel pan with extra capacity or buy an expensive cast aluminum pan?

Last edited by mopar12345; 07/17/18 12:18 AM.
Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2522910
07/17/18 12:33 AM
07/17/18 12:33 AM
Joined: Jan 2003
Posts: 25,411
Oregon
A
AndyF Offline
Too Many Posts
AndyF  Offline
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Joined: Jan 2003
Posts: 25,411
Oregon
I'd think the deep stamped steel pans should be fine for most applications. The cast pans are good if you do a lot of tranny work since they'll stand up to some more abuse. You can wrestle the tranny around on the pan without denting it all up and stuff like that.

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2522915
07/17/18 12:45 AM
07/17/18 12:45 AM
Joined: Oct 2003
Posts: 9,876
W. Kentucky
justinp61 Offline
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justinp61  Offline
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Joined: Oct 2003
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W. Kentucky
I ran a factory pan for a 518 for several years with no issues. Did have to go to a very deep aluminum pan when I went to a trans brake valve body.

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2522924
07/17/18 01:17 AM
07/17/18 01:17 AM
Joined: Mar 2004
Posts: 300
Medina, OH
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dart440_72 Offline
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Joined: Mar 2004
Posts: 300
Medina, OH
I've got one from these guys and love it. Thick rails and seals really well
https://www.lpwracing.com/Trans_Pans/Deep_Transmission_Pans.html


72 Dart 500" low deck Indy SR heads. 10.40 @129 best so far
Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2522938
07/17/18 02:05 AM
07/17/18 02:05 AM
Joined: Jan 2008
Posts: 2,203
Cotati, CA
Dave Hall Offline
top fuel
Dave Hall  Offline
top fuel

Joined: Jan 2008
Posts: 2,203
Cotati, CA
LPW is awesome! up I am putting one of their pans on my Dart trans. tonight. Changed fluid and filter of course. Also changing from conventional to the good stuff in the engine. Trans. gets NAPA type F.

BE99A555-4983-4FA7-8A2D-08083B789058.jpeg
Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523007
07/17/18 11:18 AM
07/17/18 11:18 AM
Joined: May 2003
Posts: 11,785
aZLiViN
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J_BODY Offline
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J_BODY  Offline
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Joined: May 2003
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aZLiViN
I use factory trans pans off the older 42 and 46-48 RE transmissions (904 and 727 style). That and a lowering block for the filter has served me well for years. Also ALWAYS use the factory reusable gasket torqued to 125”lb. I prefer the steel pan as those cast aluminum pieces are heavy and seem to retain heat.

Morose makes a nice light aluminum trans pan too (not cast)

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523015
07/17/18 11:41 AM
07/17/18 11:41 AM
Joined: Jan 2005
Posts: 966
Keymar, MD
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DusterKid Offline
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DusterKid  Offline
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Posts: 966
Keymar, MD
I have used 440 source deep steel pan with the filter adapter for years without any issues. With that said, I'd eventually like to get a cast aluminum pan just from the stand point I don't have a car lift. I use the jack under the trans for removal/install and have to be careful not to dent the bottom of the pan.

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523037
07/17/18 01:02 PM
07/17/18 01:02 PM
Joined: Dec 2012
Posts: 1,009
Wind Gap,Pa.
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Sammy Online content
super stock
Sammy  Online Content
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Joined: Dec 2012
Posts: 1,009
Wind Gap,Pa.
I'll be looking at that LPW pan as well.
My B & M aluminum pan leaks right in the front to LH side, no matter what I do.
Only way to seal it up with no leaks is RTV on both sides including the bolts.

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523064
07/17/18 02:22 PM
07/17/18 02:22 PM
Joined: Jan 2005
Posts: 2,366
USA, MI
MarkM Offline
Worthy
MarkM  Offline
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Joined: Jan 2005
Posts: 2,366
USA, MI
I'm using a MP deep cast pan I bought from JohnRR years ago. Not having to worry about putting creases in the rail and the drain plug alone made it worth it.

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523072
07/17/18 02:36 PM
07/17/18 02:36 PM
Joined: Jan 2008
Posts: 2,203
Cotati, CA
Dave Hall Offline
top fuel
Dave Hall  Offline
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Joined: Jan 2008
Posts: 2,203
Cotati, CA
The ATS Diesel cast aluminum pan on my dually is heavy! The 727/904 stuff isn't so heavy and the LPW has cast in bosses for temp. gauge senders or whatever. They include a billet, o-ringed block for lowering the filter. The cast pans seal way better using the factory reusable gasket. They also have plugs to drain them where the factory stamped stuff doesn't.

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523095
07/17/18 03:16 PM
07/17/18 03:16 PM
Joined: Jan 2003
Posts: 11,117
Marion, South Carolina [><]
an8sec70cuda Offline
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an8sec70cuda  Offline
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Joined: Jan 2003
Posts: 11,117
Marion, South Carolina [><]
The cast aluminum pans seem to seal up better than the steel ones.


CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: transmission pan cast aluminum vs stamped steel [Re: an8sec70cuda] #2523135
07/17/18 04:13 PM
07/17/18 04:13 PM
Joined: Jun 2003
Posts: 51,034
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
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Posts: 51,034
Romeo MI
I use a cast 518 pan.. also you might want talk
to Lenny(Ultimate trans).. he cut the lugs off
my last conv and put on new ones.. he also
changed the stall.. it was much cheaper than
buying a new conv
wave

Re: transmission pan cast aluminum vs stamped steel [Re: MR_P_BODY] #2523296
07/17/18 10:28 PM
07/17/18 10:28 PM
Joined: Jan 2004
Posts: 13,211
Mt. Vernon, Ohio
dartman366 Offline
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Posts: 13,211
Mt. Vernon, Ohio
after using cast pans I refuse to go back to a stamped steel pan for several reasons, 1- no more leake's 2- stiffens the case and acts like a girdle and,,, no more leaks, usually comes with a drain plug and the better ones come with a port for a temp gauge


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523437
07/18/18 04:16 AM
07/18/18 04:16 AM
Joined: Aug 2003
Posts: 32,291
Bend,OR USA
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Cab_Burge Offline
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Posts: 32,291
Bend,OR USA
One thing to keep in mind when making your decision on this is a rock kicked up against the cast saluminum could break it and make it shatter like temper glass, not good during a run s it work
A steel pan may dent and even have a hole poked into it but it won't dump near as much tranny fluid under the car as a cast shatter pan will shruggy Did I mention I hate "Murphy" runaway whiney
I've ran both, no problems with either type, yet shruggy

Last edited by Cab_Burge; 07/18/18 04:17 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: transmission pan cast aluminum vs stamped steel [Re: Cab_Burge] #2523603
07/18/18 02:35 PM
07/18/18 02:35 PM
Joined: Jan 2003
Posts: 20,005
Rio Linda, CA
John_Kunkel Offline
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John_Kunkel  Offline
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Rio Linda, CA
I don't have a sacrificial cast pan to test your "shatter" theory but I'll bet the cast pan is a little more robust than you think.


I'm supposed to respect my elders, but its getting harder and harder for me to find one now.
Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523607
07/18/18 02:41 PM
07/18/18 02:41 PM
Joined: Jan 2011
Posts: 370
st.louis,mo.
69b1dart Offline
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st.louis,mo.
aluminum will despress heat than steel

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523626
07/18/18 03:22 PM
07/18/18 03:22 PM
Joined: Dec 2008
Posts: 125
montreal,quebec
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mopar12345 Offline OP
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mopar12345  Offline OP
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Joined: Dec 2008
Posts: 125
montreal,quebec
So it seems like the majority go with a cast pan. I just want something that I put on and not have to worry about it breaking or leaking.
Another question I have for you all is should I bypass the radiator transmission cooler and go straight to the external cooler or should I plumb both coolers together?
Right now it is bypassed but I’m thinking if I go with a 1qt extra capacity with both coolers connected would come close to having a 2qt and direct to the external transmission cooler

Re: transmission pan cast aluminum vs stamped steel [Re: mopar12345] #2523630
07/18/18 03:36 PM
07/18/18 03:36 PM
Joined: Jun 2003
Posts: 51,034
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
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Joined: Jun 2003
Posts: 51,034
Romeo MI
Run both
wave

Re: transmission pan cast aluminum vs stamped steel [Re: MR_P_BODY] #2523787
07/18/18 08:48 PM
07/18/18 08:48 PM
Joined: Aug 2003
Posts: 32,291
Bend,OR USA
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Cab_Burge Offline
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Joined: Aug 2003
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Bend,OR USA
Originally Posted By MR_P_BODY
Run both
wave
iagree up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: transmission pan cast aluminum vs stamped steel [Re: John_Kunkel] #2523788
07/18/18 08:49 PM
07/18/18 08:49 PM
Joined: Aug 2003
Posts: 32,291
Bend,OR USA
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Cab_Burge Offline
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Joined: Aug 2003
Posts: 32,291
Bend,OR USA
Originally Posted By John_Kunkel
I don't have a sacrificial cast pan to test your "shatter" theory but I'll bet the cast pan is a little more robust than you think.

Have you seen a cast piston shatter? I have down


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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