Swap a t-56 for t-5 or beef up a t-5? - Mustang Evolution

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Old 07-12-2016, 09:39 PM   #1
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Swap a t-56 for t-5 or beef up a t-5?

So my first to second shift is starting to grind on high rpm shifts. I was wondering if anyone has heard of astro transmissions and if they are any good, the gear sets inside. Or if i should switch to a t-56 trans and what does that entale? I have about 365hp at the crank and 3?? Ft. Lbs of torque. Its a daily driver and some trips down the track and on the highway alot. Any info would be helpful, thank you in advance.

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Old 07-15-2016, 10:01 AM   #2
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I have a friend with a turbo fox and he has a T5 built by Promotion which uses the Astro gears sets and other goodies and that thing is buttery smooth even shifting above 6k. I have a TKO 500 that I had rebuilt with all the new goodies with carbon fiber this, new slider that, improved shifter forks and his Astro T5 is just way better. It is due to the initial design.
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Old 07-15-2016, 10:18 AM   #3
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Thanks. I called astro yesterday and they said for the syncros and sliders they just use brand new tremec stuff. Improved gears though and shafts. But not 5th gear.?

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Old 07-15-2016, 11:11 AM   #4
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Don't need to do 5th, you should never be going to power in 5th anyway. They can use a different gear for a .64 overdrive if you want which is probably better. Going from 1.00 to .59 is a HUGE gap between 4th and 5th.


As far as Astro... I'd say pretty much everyone has heard of them. Tony is a great guy and will build you a top notch transmission. The A5 is probably the best 5 speed there is for our cars (including modulars via a McCleod Bell) because its very light, very compact, will be the smoothest shifting trans you'll ever have and being technically a T-5 externally it is a direct 100% bolt in and easy to install.


Only issue I ever hear with the A5 is some have said the case can crack under very high power. This is easily remedied with a G-Force case for an extra $200-$300 (I think). NOTE: The Astro and G-Force gearsets are NOT the same if you hear from anyone that they are.
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Old 07-15-2016, 12:53 PM   #5
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Thank you. Thats what astro was saying, that the two gearsets are different. The g force is "beefier". Thanks for the info. I probably will go with them. Now i have to see which is more cost efficient, to buy the parts and do it myself or buy an already built one?

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Old 07-15-2016, 01:31 PM   #6
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Quote:
Originally Posted by havhammer View Post
Thank you. Thats what astro was saying, that the two gearsets are different. The g force is "beefier". Thanks for the info. I probably will go with them. Now i have to see which is more cost efficient, to buy the parts and do it myself or buy an already built one?

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The Astro gearset is much stronger than the G-Force. The only thing G-Force you want to use is the case if you feel like you might need it.

I'd just get one already done TBTH.
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Old 07-15-2016, 01:58 PM   #7
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Also what clutch are you planning on using?

That will be the next part of the puzzle.
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Old 07-15-2016, 03:54 PM   #8
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I have a mcleod now. I will have to get a new disc (26 spline) if i buy the whole trans from astro.

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