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Old 03-23-2010, 04:48 PM
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Gas tranny swap into a diesel

I have a 2003 Ford f250 4x4 that is bone stock with the 7.3 engine and a auto transmission.It has 454000km's most of them highway.The tranny seems a little worn,what I mean is it shifts a little sluggishly and a little more RPM's to get it up to the posted speed limit.I came across a deal for a transmission from a 2001 F250 Superduty 4x4 that has the 5.4 Triton engine with a whole lot less KM's.My question is would a 4r100 transmission from a gas engine work in a diesel powered engine?Would the bell housing bolt pattern be the same? Any help would be appreciated.
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Old 03-23-2010, 05:28 PM
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Originally Posted by inh0001 View Post
I have a 2003 Ford f250 4x4 that is bone stock with the 7.3 engine and a auto transmission.It has 454000km's most of them highway.The tranny seems a little worn,what I mean is it shifts a little sluggishly and a little more RPM's to get it up to the posted speed limit.I came across a deal for a transmission from a 2001 F250 Superduty 4x4 that has the 5.4 Triton engine with a whole lot less KM's.My question is would a 4r100 transmission from a gas engine work in a diesel powered engine?Would the bell housing bolt pattern be the same? Any help would be appreciated.
the bolt pattern will fit but diesel trans are pulse width modulated and require different solenoid and torque converter and different pump. Also there are some clutches that are totally different due to the tremendous torque diesels produce. I would say rebuild old one.
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Old 03-23-2010, 05:51 PM
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Won't work,. dowell pins are diffentt..
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Old 03-23-2010, 05:54 PM
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Send a message via AIM to dsljnky

as said before, that gasser trans wont hold the torque. input shafts are a lot smaller and weaker
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Old 03-24-2010, 12:22 PM
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8599.fyi, the bolt partterns are different.
dsijnky, fyi, input shafts are the same. The diesel does have more clutches in it as you said.
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Old 03-24-2010, 04:14 PM
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Originally Posted by ipz2222 View Post
8599.fyi, the bolt partterns are different.
dsijnky, fyi, input shafts are the same. The diesel does have more clutches in it as you said.
your right, today i saw a gasser and a diesel trans the pins are totally different. sorry my bad.
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Old 03-24-2010, 07:21 PM
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Put it in. Then when you take it out shortly snap some shots. I wanna see what torture a diesel will do to a gasser tranny
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Old 06-23-2014, 09:55 PM
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How big of a fight would it be to put a 6 speed from a 7.3 into a 5.4 truck?
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