Educate me on my 47RE
#1799086
04/09/15 01:19 AM
04/09/15 01:19 AM
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Joined: Jan 2005
Posts: 147
Alberta, Canada eh!
70Cudha
OP
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OP
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Joined: Jan 2005
Posts: 147
Alberta, Canada eh!
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Sorry if this has been asked in the past. I have a 2003 (built Sept 02) Ram 2500 with the 5.9L (250) Cummins SMARTY JR programmed with an additional 70hp for towing and the 47re 4 speed overdrive auto running 3.73 in the diffs.
My issue is with towing my 26' enclosed car hauler and steep grades. In 3rd gear the diesel is cranking 2300rpm at 60mph. In overdrive it drops to 1800rpm at the same speed however on hills I drop revs and running below that I'm worried I'll burn up that tranny. The problem is the big jump or loss in power between 3rd and 4th. Any suggestions for mods to the existing tranny to help keep it all together and not grenade the tranny?
Thx in advance.
1970 EV2 Barracuda Hardtop
1970 FE5 Barracuda Gran Coupe Convertible
1969 B5 Dart GTS 383
1968 TT1 Barracuda Convertible
1997 Ram SS/T
2008 3500 Ram Diesel
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Re: Educate me on my 47RE
[Re: 70Cudha]
#1800949
04/11/15 11:13 AM
04/11/15 11:13 AM
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Joined: Dec 2014
Posts: 5,748
ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,748
ohio
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Downshift or use the OD lockout when hitting steep grades. That's what it's for.
There's several reasons to drop a gear, all center around heat. Heat that damages the trans and engine.
At lower engine speeds it takes more boost and fueling to create the same power, this drives up EGTs and can hurtthe turbo and possibly burn valves. 2300 rpm is a cake walk for theCummins and better than lugging at 1800. If you have egt readout try to stya below 1300.
At lower rpm the torque conveter is being worked hard and building lots of heat. Higher rpm puts the converter closer to it's optimum speed creating less heat buildup.
As for loss of power, when dropping a gear you do have to add more throttle. The engine is spinning faster and moving more air, you need to add fuel to keep up.
Maybe this is something that you can tune with the programmer?
Angry white pureblood male
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Re: Educate me on my 47RE
[Re: redraptor]
#1802113
04/13/15 12:13 AM
04/13/15 12:13 AM
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Joined: Jan 2005
Posts: 147
Alberta, Canada eh!
70Cudha
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OP
member
Joined: Jan 2005
Posts: 147
Alberta, Canada eh!
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Sorry boys guess my title was misleading and I wasn't clear. I'm researching what modifications others have made to their 47re tranny's to overcome the obvious issues when towing.
1970 EV2 Barracuda Hardtop
1970 FE5 Barracuda Gran Coupe Convertible
1969 B5 Dart GTS 383
1968 TT1 Barracuda Convertible
1997 Ram SS/T
2008 3500 Ram Diesel
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Re: Educate me on my 47RE
[Re: 70Cudha]
#1802250
04/13/15 09:04 AM
04/13/15 09:04 AM
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Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
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Sorry boys guess my title was misleading and I wasn't clear. I'm researching what modifications others have made to their 47re tranny's to overcome the obvious issues when towing. Go to the PATC web site (google search PATC) they have everything you could possibly need to grenade proof your 47RE.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Educate me on my 47RE
[Re: Guitar Jones]
#1802353
04/13/15 01:21 PM
04/13/15 01:21 PM
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Joined: Jan 2005
Posts: 147
Alberta, Canada eh!
70Cudha
OP
member
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OP
member
Joined: Jan 2005
Posts: 147
Alberta, Canada eh!
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Guitar Jones
Yes. Looks like PATC offers up to 5 levels of upgrades to consider.
Thanks for the lead.
1970 EV2 Barracuda Hardtop
1970 FE5 Barracuda Gran Coupe Convertible
1969 B5 Dart GTS 383
1968 TT1 Barracuda Convertible
1997 Ram SS/T
2008 3500 Ram Diesel
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Re: Educate me on my 47RE
[Re: 70Cudha]
#1804702
04/16/15 02:09 AM
04/16/15 02:09 AM
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Joined: Oct 2007
Posts: 3,869
Oregon
hooziewhatsit
master
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master
Joined: Oct 2007
Posts: 3,869
Oregon
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There was another mod to the oiling holes in the OD section you could do while it was apart. I'll have to see if I can find it again.
If you ever find yourself in a fair fight, your tactics suck.
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Re: Educate me on my 47RE
[Re: hooziewhatsit]
#1804957
04/16/15 02:35 PM
04/16/15 02:35 PM
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Joined: Jan 2003
Posts: 25,720
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,720
Rio Linda, CA
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The shaft mod is to drill this hole out to 3/16"
The INTERNET, the MISinformation superhighway
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