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Unread 05-22-2012   #1 (permalink)
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Default T5 transmission swap

I have a 1983 mustang GLX convertible and I already did a 5.0 swap, its a 1987 model block, and put 3.73 rear end gears with a limited slip under it. It still has the stock C4 transmission in it, which is starting to slip so I am contemplating what transmission to go with. I really want to do a T5 swap in it but am not completely sure what all modification and parts changes I will need to make to accomplish this and where to find the right parts.

Any help would be much appreciated. Thanks, John.
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Unread 05-23-2012   #2 (permalink)
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Your going to need the 5sp trans, bell housing, manual pedals,flywheel, clutch, throw out bearing, pilot bearing, clutch cable. Also might need a driveshaft. If its fuel injected you need to get a manual trans CPU too.
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Unread 05-23-2012   #3 (permalink)
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Forgot to mention that besides getting all the parts everything will bolt in with no modification. Not a big deal to do. You can get parts from a junkyard or look for people parting out cars. By me Craigslist has these swaps on all the time from anywhere between 300 - 500 bucks. Good luck.
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Unread 05-23-2012   #4 (permalink)
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Quote:
Originally Posted by ny88vertible View Post
If its fuel injected you need to get a manual trans CPU too.
thats incorrect
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1987 Notchback - N/A stock 302, TFS heads, Holley Systemax, FTI cam, Astro A5
Best so far: 10.92 @ 123mph with a 1.49 60ft
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Unread 05-23-2012   #5 (permalink)
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Thanks for the imput. I was a little nervous at first about jumping into a T5 swap but y'all make it sound pretty simple. Looking forward to it now. My motor isn't stock H.P, will a stock T5 hold up to like 350-375 RWHP you think? It is Carbed as well.
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Unread 05-23-2012   #6 (permalink)
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Quote:
Originally Posted by Billet works jr View Post
My motor isn't stock H.P, will a stock T5 hold up to like 350-375 RWHP you think? It is Carbed as well.

depends on how you drive it..on the street..its should live for a while if you dont beat on it...

at the track with sticky tires..well...here's mine after about 8 passes with 335rwhp.... in a 2750lb race weight car

http://i335.photobucket.com/albums/m.../WP_000087.jpg
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Unread 05-23-2012   #7 (permalink)
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Quote:
Originally Posted by need4spd90 View Post
depends on how you drive it..on the street..its should live for a while if you dont beat on it...

at the track with sticky tires..well...here's mine after about 8 passes with 335rwhp.... in a 2750lb race weight car

http://i335.photobucket.com/albums/m.../WP_000087.jpg
That looks bad. How did it happen? Does anyone know of a high performance T5 on the market?
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Unread 05-24-2012   #8 (permalink)
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3rd gear is the weak point in T5's..i hit 3rd gear and the power just tore all the teeth right off

The T5 Z spec is the next step up, but it's only slightly stronger than stock, and won't last much longer under high power and hard driving

I went with the Astro A5 gear kit..aftermarket gearset that fits inside the stock T5 case..shifts just like a stock T5, but will handle 550hp/485tq, or 650hp/585tq with their alloy mainshaft upgrade
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Unread 05-24-2012   #9 (permalink)
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I didn't know 3rd was a weak spot. Thanks for that info as well. I'm not planning on driving it hard a whole lot but I'm sure I will horse around sometimes, it's my daily driver and I'm hoping to get better gas mileage with a 5 speed is one of the reasons I want a T5. Is that gear kit something I could install in my garage or would I need to pay a shop to do it?
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Unread 05-24-2012   #10 (permalink)
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i did mine myself..you can also buy them complete and ready to bolt in from Astro or any of their dealers..if you've never done it before, you're probably best of to buy it complete..but with time and patience it can be done yourself

one thing you would have to do to run the A5 is get a 26 spline clutch..the factory T5 uses a 10 spline input shaft, and the A5 has a 26 spline...

heres a pic of the A5 2nd gear next to a stock T5 2nd gear, for example

http://i335.photobucket.com/albums/m...90/V__FE17.jpg
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Unread 05-24-2012   #11 (permalink)
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Ok cool. Are you running a short throw shifter on your T5? If so which one would you recommend? Are you running Trick Flow heads on your motor?
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Unread 05-24-2012   #12 (permalink)
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I have a pro5.0 shifter base and the stock handle cuz its more comfortable for me

Yeah trickflow heads
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Unread 05-24-2012   #13 (permalink)
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Cool. Which TFS heads are you running and what size??? I'm hoping to make a custom shift handle and shifter arm, probably out of Billet. I will try to post some pics of my car in here pretty soon.
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Unread 05-25-2012   #14 (permalink)
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they are the 170's, they were part # 51400004..i think the new models have been slightly redesigned in the last year..i bought mine used with a set of trickflow 1.6 rockers for about $700...they came with trickflows upgraded dual springs, which i upgraded even further with a set of LSx style lightweight springs i got from Ed Curtis
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Unread 05-25-2012   #15 (permalink)
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That's AWSOME. I'm running the high flow TFS Twisted Wedge heads that also have duel valve springs and I'm running Ford Racing 1.6 Roller Rockers on my 306. Did you stud your heads and the bottom end of your block??? Are your heads the 58cc combustion chamber heads or the 61cc??? I'm running the 190s that have the 64cc combustion chambers. I'm also running the TFS .500 lift cam. I think that's the stage 1 right?
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