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why, the trannys are poop
The 4.0L T-5's aren't crap. Take reliability versus performance. The T-5 was around for 40 years: simple, easy to work on, and even when the sychros shred, you can get it in gear. Chevy, Ford, AND Chrysler used it for cheap, heavy duty applications for a reason. You can shred a gear at the track, then get to work on Monday. Then get the gear back for 4 hrs labor and 75$ in parts.

Who's the real winner here?
 

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2013 V6 Premium Convertible
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7 Posts
The 4.0L T-5's aren't crap. Take reliability versus performance. The T-5 was around for 40 years: simple, easy to work on, and even when the sychros shred, you can get it in gear. Chevy, Ford, AND Chrysler used it for cheap, heavy duty applications for a reason. You can shred a gear at the track, then get to work on Monday. Then get the gear back for 4 hrs labor and 75$ in parts.

Who's the real winner here?
Seems to me that being easily fixable is not the definition of a good tranny. Being strong enough to not be destroyed, and not requiring repair after a weekend of fun, is the definition of a good tranny.
 

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Tech Advisor
2006 Mustang GT Deluxe
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84 Posts
The original question was whether the T5 tranny behind the 4.0 V6 would fit behind a 4.6 V8. The answer to that is yes. Would it be wise to do it? No, and the reason is simple. The T5 is a medium duty unit that's rated to a maximum of 300lbft of input shaft torque. A 4.6 3V already makes more than that in stock form and makes even more if you add some performance bolt ons.
The T5 is an inexpensive, dependable unit but you have to recognise its limitations and work within them.
 
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