T56 swap ?'s - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 20 (permalink) Old 10-06-2009, 08:46 PM Thread Starter
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T56 swap ?'s

I am considering a T56 swap. I figure if it will live behind a viper it should be able to live behind a powerstroke. Am I way off on this?

I am thinking about swapping in a '00 powerstroke in a mid '90s F150 this is the reason for this question. It will be more of a hot rod street truck than anything.

I know I will have to convert the bell housing pattern and not sure how this will work yet. Are the clutches in the super duties hydraulic or cable driven?

What are your thoughts, comments?
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post #2 of 20 (permalink) Old 10-06-2009, 08:54 PM
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Re: T56 swap ?'s

I wouldnt, that T56 wont take the torque very well...

Superduty's have hydraulic clutch systems. The T56 in ls1 camaro's and vettes have hydraulic clutch also.

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post #3 of 20 (permalink) Old 10-06-2009, 08:58 PM Thread Starter
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Re: T56 swap ?'s

Don't vipers make around 500lbft? Is there a particular reason why it wouldn't handle the same from diesel?
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post #4 of 20 (permalink) Old 10-06-2009, 09:02 PM
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Re: T56 swap ?'s

Are you going to leave your diesel motor stock? If you plan to get any extra power out of it i wouldnt do it. A diesel can make 500ftlb pretty easy. Throw some slightly bigger injectors and a turbo on and i dont see that trans lasting. I hear about guys with T56 starting to have problems with not much over 500-550 or so HP. Not all, but more than i would like to hear. I have a LS1 camaro with the T56, so i have done some research but am in no way an expert.

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post #5 of 20 (permalink) Old 10-06-2009, 09:06 PM Thread Starter
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Re: T56 swap ?'s

Ok thanks, I will keep looking then.
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post #6 of 20 (permalink) Old 10-06-2009, 09:27 PM
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Re: T56 swap ?'s

Go on some viper, corvette, and camaro/trans am forums and ask around what the higher HP guys are running for trans. Ask them what kind of HP levels they are running at and if they have had any problems. Should help you out some! Also have you considered just running a ZF6?

I would look at the gear ratio's on a ZF6 compared to a T56. I will see if i can find them for you as i am curious how they compare myself.

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post #7 of 20 (permalink) Old 10-06-2009, 09:40 PM Thread Starter
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Re: T56 swap ?'s

Well, I went on GForce transmissions and you can have your T56 built to handle about 800lbft and from what I can tell that is a conservative estimate.

I also found the replacement for the T56 is the TR6060 rated for 600ftlbs from the factory. One of the reasons I was thinking about a T56 was they are more readily available and cheaper than the newer stuff.

Also is there any adapters available to go from Interantional bellhousing pattern to small block ford or even big block ford?

As far as mods I plan better turbo but nothing crazy, injectors maybe a stage 2-nothing higher, better intercooler, headers and up pipes a good 4" exhaust, intake, hotter thermostat mainly for mileage, electric rad fans, regulated fuel return, maybe bigger oil if i need it, switch chip. I think that covers it. Nothing crazy but want to make good power without having a bunch of custom stuff.

I was hoping a T56 might be lighter/smaller and more available but don't know for sure. If a ZF6 has similar ratios it may just be much easier to do that, although I am looking for uniqueness here as well, just not at the cost of money wasting.
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post #8 of 20 (permalink) Old 10-06-2009, 10:19 PM
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Re: T56 swap ?'s

Well, here is the info on the ZF6 compared to a T56

ZF6 -------------- T56
Low = 5.79 ----- 1st = 2.66
1st = 3.31 ----- 2nd = 1.78
2nd = 2.10 ----- 3rd = 1.30
3rd = 1.31 ----- 4th = 1.00
4th = 1.00 ----- 5th = 0.74
5th = 0.72 ----- 6th = 0.50

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post #9 of 20 (permalink) Old 10-06-2009, 10:22 PM
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Re: T56 swap ?'s

looking at the gear ratio's, it looks like that part could work. I would definitly consider diff gears though depending on what you have to start with.

I can understand the unique factor your going for, i have thought about this a little while ago, its an awsome idea but way out of my budget!

As far as the adapter, that im not to sure about, you might have to get something custom made for the 7.3 to whatever bell housing you use. I would give destroked a call and maybe they can help you out with some idea's or at least point you in the right direction with somone to talk to... Here is a link to their adapter plates, they do have one for a 7.3 to an allison trans DESTROKED: Adapter Plates

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post #10 of 20 (permalink) Old 10-06-2009, 10:34 PM Thread Starter
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Re: T56 swap ?'s

I copied and pasted this chart and I believe there are different gear ratios for different model T56's, ie. Fbody, GTO, Cobra, Viper

Six Speed Manual Transmissions
Trans Model First Second Third Fourth Fifth Sixth
Ricardo 6 2.611 1.708 1.233 0.943 0.767 0.625
M6HD-6 5.79 3.31 2.10 1.31 1.00 0.72
M6HD-C ? ? ? ? 1.00 0.72
M6HD-W ? ? ? ? 1.00 0.72
S6-650 5.79 3.30 2.10 1.31 1.00 0.72
Tremec T56 2.90 2.07 1.43 1.00 0.84 0.57


Five Speed Manual Transmissions
Trans Model First Second Third Fourth Fifth
T45 3.37 1.99 1.33 1.00 0.67
T5OD (1992-1998) 3.35 1.93 1.29 1.00 0.78
T5OD (1999-2005) 3.35 1.99 1.33 1.00 0.68
TR-3150 Send us the gear ratios
TR-3650 3.38 2.00 1.31 1.00 0.67 (Close Ratio)
TR-3650 3.77 2.00 1.31 1.00 0.67 (Wide Ratio)
TR-4050 5.81 2.94 1.61 1.00 0.77 (Close Ratio)
TR-4050 6.16 3.11 1.71 1.00 0.76 (Wide Ratio)
M5OD 3.97 2.34 1.46 1.00 0.79 (Mustang 2.3L)
M5OD 3.35 1.93 1.29 1.00 0.68 (Mustang 5.0L)
M5OD-R1 3.72 2.20 1.50 1.00 0.79 (2.3L, 3.0L Engines)
M5OD-R1 3.40 2.05 1.31 1.00 0.79 (4.0L Engine)
M5OD-R1HD 3.40 2.05 1.31 1.00 0.79
M5OD-R2 3.91 2.24 1.49 1.00 0.80
M5OD-R4 / M1HD 3.38 2.06 1.30 1.00 0.79
M5HD 4.14 2.37 1.42 1.00 0.77 (Close Ratio - Gasoline)
M5HD-W 5.72 2.94 1.61 1.00 0.76 (Wide Ratio - Diesel)
M5R2 3.75 2.32 1.43 1.00 0.75
M5R2-C 3.42 2.16 1.34 1.00 0.75
M5-221 1.00 Send us the gear ratios

So now the question is which ratios are better for performance and not necessarily towing or 4 wheeling. I am also having trouble finding an adapter to go from 7.3l to sbf
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