5 Speed Tranny?
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Posting Guru
Joined: Apr 2004
Posts: 2,295
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From: Big Lake, MN
5 Speed Tranny?
I've been around for awhile and I am curious. Has anybody heard of or done a tranny swap from newer five speed tranny into the ex with the 4 speed? Sorry I don't know the trann names. I have a 2000 with the 7.3. Would this put the engine into an unfavorable engine speed? I have not done a search on the forum for this, just curious if anybody has done something like this. I also under stand the possibilty of different input shaft ect...
Thanks for the info
Thanks for the info
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
The physical should be doable, the wiring and computer control would be the difficult part. The EEC-V computer might be programmable for it, but you'd have to check with custom tuners about that.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
The top three gears in the TorqShift five speed trans are identical to the top three in the 4R100 four speed trans. What's different is the TorqShift has a 3.11:1 first gear, the 4R100 has 2.47:1. So you would gain some launch, but nothing after the truck is more than about 10 MPH.
The TorqShift was never made with a bellhousing that will bolt to a 7.3L. You'd need to have an adaptor made. I'd guess that's a couple thousand, but that is the cheap part.
Custom wiring and a custom computer to make this work is going to cost a lot. You could buy a brand new truck for less than this will cost. There is NO WAY to make the computer in your truck shift a TorqShift.
The TorqShift was never made with a bellhousing that will bolt to a 7.3L. You'd need to have an adaptor made. I'd guess that's a couple thousand, but that is the cheap part.
Custom wiring and a custom computer to make this work is going to cost a lot. You could buy a brand new truck for less than this will cost. There is NO WAY to make the computer in your truck shift a TorqShift.
