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Old 04-07-2018, 02:22 PM   #1
69GT
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Can GM T-56 guts swap into Ford T-56?

So as far as I can tell there's absolutly no performance advantage to swapping my Mach 1s' 5-Speed for a Cobra 6-Speed. The only thing the Cobra 6-Speed offers is a tweener overdrive gear that halves the massive drop off of the current 5-Speed. Both O/D ratios are virtually the same.
So if I went 6-Speed I would much rather have the GM ratios ending with a .5 overdrive so I could combine that transmission ratios with a significant rear gear ratio bump. Like 4.30s or something.

Current Mach 1 has 3.55s which in the stock .62 O/D ratio puts its' final drive ratio at 2.20

Mach 1 with 4.30 gears and the GM .5 ratio makes the final drive ratio 2.15.

All the gears in between get a nice torque multiplier jump especially 2nd through 4th for faster acceleration with no loss in cruising RPM and gas MPG.

So is swapping Ford and GM T-56 guts possible?
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Old 04-07-2018, 11:57 PM   #2
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Re: Can GM T-56 guts swap into Ford T-56?

Although I don't have an answer for you, I was thinking about the 6 speed with the (.50) also. I've had 4.30s for over 20K miles. Highway cruising is a bit much but, acceleration can't be beat
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Old 04-17-2018, 09:08 PM   #3
69GT
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Re: Can GM T-56 guts swap into Ford T-56?

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Originally Posted by ShakeMe View Post
Although I don't have an answer for you, I was thinking about the 6 speed with the (.50) also. I've had 4.30s for over 20K miles. Highway cruising is a bit much but, acceleration can't be beat
Yeah. That's why the .5 overdrive is so appealing to me. 4.30s and the same as stock cruising RPM with a boost to all the other gears that need it. I'll try and get an answer on some other forums if no one here knows.
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Old 04-17-2018, 10:40 PM   #4
311-420
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Re: Can GM T-56 guts swap into Ford T-56?

If you can't get a straight answer from a forum, you can call pro-motion and ask.

http://promotionpowertrain.com/1233518.html
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Old 04-21-2018, 09:12 PM   #5
69GT
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Re: Can GM T-56 guts swap into Ford T-56?

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Originally Posted by 311-420 View Post
If you can't get a straight answer from a forum, you can call pro-motion and ask.

http://promotionpowertrain.com/1233518.html
Thank you. I will
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