T45+Broken Shift Fork=Zero Fun - TCCoA Forums
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post #1 of 7 (permalink) Old 01-12-2017, 02:12 AM Thread Starter
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T45+Broken Shift Fork=Zero Fun

A good friend of mine I went to school with has a built 2001 Mustang GT that was having issues shifting out of 2nd most of the summer and his Mustang makes serious power. It puts down 630rwhp and 570ftlbs with a T-trim blower, Holley EFI on a Coast High Performance built stroker. Somehow he's stil using a stock T45 although it probably the 4th one. its been really hard to get into 3rd and 4th gear and when he came to my garage for the test drive he passed a car and went for the 2-3 shift.... Nothing, stuck in 2nd gear and drove 6 miles to me in 2nd gear. Got the trans out and the 3-4 shift fork is broke. Replacing it means the entire transmission has to come apart and the the gearsets have to come out. Before this I never had a T45 apart but have done a ton of T-5s. Had to make a puller to get 5th gear off the countershaft but other than that it wasn't to bad. Just had to pay attention. If you're banging gears on a T-45 and miss 3rd way to much, its more than likely the fork and not your mad driving skills!
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post #2 of 7 (permalink) Old 01-12-2017, 02:48 AM
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post #3 of 7 (permalink) Old 01-12-2017, 02:54 AM Thread Starter
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OK thank you sorry about that

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1989& 2 1990 Thunderbird SCs
1990 5.0 swapped Mercury Cougar
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1987 Mark VII, 1989 Mark VII, 2 1990 Mark VIIs
1995 Mark VIII, And lots of Mustangs...Lol
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post #4 of 7 (permalink) Old 01-12-2017, 06:23 AM
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This is a very common problem on T45s, and if it isn't all back together yet, they do make a billet 3-4 shift fork, which will stop this from ever happening again.
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post #5 of 7 (permalink) Old 01-12-2017, 07:25 AM Thread Starter
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I've been exploding T-5s and even a Tremec or two for 25 years, I've had everything from a Turbocoupe t5 to a Hanlon Motorsports pro shifted t-5 and I like to ride around on drag radials with a full bottle of nitrous. Needless to say I can rebuild any t5 with my eyes closed but never owned or even driven a car with a T45 until this one. Even with a fresh kit in it and a billet shifter I wasn't all that impressed. My buddy said this is the last time he's spending another cent on these and already has most of a 400 swap at my shop. While he was here I swapped 4:10s for 3:55s and with a 16lb pulley setup on the T trim the 3rd gear pull is RIDICULOUS!

Cars Owned
1989& 2 1990 Thunderbird SCs
1990 5.0 swapped Mercury Cougar
1990 5.0 Thunderbird 1995 4.6 Thunderbird
1987 Mark VII, 1989 Mark VII, 2 1990 Mark VIIs
1995 Mark VIII, And lots of Mustangs...Lol
Sold! 😥 1991 Lincoln Mark VII
Currently Own
1998 Lincoln Mark VIII, 2002 Lincoln LS, 1986 Mustang Coupe, 2001 Ford Crown Victoria, and wife's 2008 Jeep Cherokee Limited
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post #6 of 7 (permalink) Old 01-12-2017, 07:48 AM Thread Starter
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Also put a new carbonfiber kit in the rear, along with the 3:55s. Wish I had a better pic of the 410s but you can see how shiny they are. Only had roughly 20K on them but he drives this car hard and uses all 630rwhp every chance he gets. The wear in the pinion gear was pretty bad and very visible on the ring gear. From now on this will get checked every other month



We put this new motor in last march and Alternative Auto installed the Holley EFI and dynoed it.

Cars Owned
1989& 2 1990 Thunderbird SCs
1990 5.0 swapped Mercury Cougar
1990 5.0 Thunderbird 1995 4.6 Thunderbird
1987 Mark VII, 1989 Mark VII, 2 1990 Mark VIIs
1995 Mark VIII, And lots of Mustangs...Lol
Sold! 😥 1991 Lincoln Mark VII
Currently Own
1998 Lincoln Mark VIII, 2002 Lincoln LS, 1986 Mustang Coupe, 2001 Ford Crown Victoria, and wife's 2008 Jeep Cherokee Limited
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post #7 of 7 (permalink) Old 01-12-2017, 10:51 AM
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The T45s are pretty strong other than the faberge forks, and reverse lockout issue some have. I had to make a makeshift puller for 5th for my old T45 as well, probably my least favorite part about ALL of the factory manuals behind mod motors is the lack of top access to the forks. I found it a bit easier with the TR3650(they had fork issues too), only 5th is housed in the extension housing and a puller isn't needed, and the individual shift rail detends do a better job keeping everything in place when you pull/install the case.

-Matt
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