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Tremec T5 Swap

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Old Oct 12, 2013 | 01:20 AM
  #1  
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Tremec T5 Swap

Folks,

I am looking to replace the Mustang 1968 3-Speed in my 1951 Ford F-1.

I want to use Tremec WC T5. Mated to the 1968 Mustang 302 engine.

In reading up and getting to know what I need to do, I thought the swap would be reasonably straight forward. I thought there might be an adapter place from my existing bell housing to the T5.

Now Transmission swaps are way out side my skill set, so I approached the local restoration shop.

They tell me that I have to replace the clutch, bell housing, starter, clutch & brake pedals, etc. to install a T5.

Not necesairly looking for installation details, but does this sound reasonable?

Learning as I go.

Thank You.

Tug Hercles
 
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Old Oct 12, 2013 | 01:59 AM
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It's not reasonable. Find another shop. An adapter plate to fit the T5 to the Mustang bellhousing and other assorted pieces necessary to to the trick can be found from most any Mustang resto parts company. It's a popular swap. Whatever clutch setup you have now will continue to work.

The harder part will be fitting the T5 into the truck chassis. It will take considerable fabrication to make the space necessary to fit that long tranny into the space the tiny 3 speed now resides in. But it can be done. Good luck.
 
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Old Oct 12, 2013 | 07:35 AM
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This attached site really helped me in my T5z match up . Mine was a little more difficult due to the engine I am using. I had to purchase a hydraulic clutch and adapter plate but the rest was pretty straight forward.

TREMEC 5-speed 6-speed Transmission Conversion solutions Ford Mustang, Falcon, Cobra, Hotrod, GM Camaro, Chevelle Tri-5 Mopar Muscle

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Old Oct 12, 2013 | 10:24 AM
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I think it's possible you need much of that. If the T5 input shaft is longer than the 3-sp, then getting either a later-Mustang bellhousing matched to a T5 or an adapter to make up the difference is needed. Not much chance the T5's front bearing retainer is the same diameter as the 3-sp's. The clutch disc, at a minimum, will need to be replaced to match the T5's spline. If you keep the existing BH with clutch fork etc, you have to make sure the front bearing retainer sleeve on the T5 is compatible with the fork and release arm.

You haven't said how the existing clutch is actuated. The existing 3-sp is actuated very differently than the stock '51 clutch. What you have now may or may not work with a later BH/clutch setup.
 
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Old Oct 12, 2013 | 11:15 AM
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On my '55 I used the T5 bell housing that requires a diaphragm style pressure plate, spline count was the same for the clutch disc but if you have it out put a new disc in. You can use the stock bellhousing but like said you need the adapter to space out the trans because of the longer input shaft. If you go this route the Long style clutch (assuming you are using the '68 style clutch) from the '68 trans would work. Stock ford T5's pull the fork as opposed to pushing it. I used my stock (mustang) push style arm by mounting the the early fulcrum to the T5 bellhousing. The late model T/O bearing fit the arm fine. Another suggestion is to replace the front bearing support on the T5 as the stock one is aluminum where the T/O bearing rides and they wear out, places like Summit Racing sell one for about $30, if I remember correctly.
 
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Old Oct 12, 2013 | 10:18 PM
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What about shifter location, wont it be under the seat?
 
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Old Oct 13, 2013 | 07:21 AM
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Originally Posted by neald
What about shifter location, wont it be under the seat?
Using the S10 tail shaft positions the shifter about 8" forward.



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Old Oct 13, 2013 | 08:27 AM
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That would require changing out the tail housing to the S10 style.
 
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Old Oct 13, 2013 | 10:03 AM
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Right. I thought we were talkin tremec here. Lol
 
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Old Oct 13, 2013 | 11:01 AM
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T5 Swap

I appreciate all the replies.

I missed soemthing in the last comment.

Will the shifter on a Tremec T-5 clear the seat or will I have to modify the tail shaft?

Thank you.

Tug Hercules
 
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Old Oct 13, 2013 | 12:28 PM
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"Tremec" includes all T5's of which there are many variants.
S-10 = forward position of the shifter relative to tailshaft (close to stock location)
Mustang = rearward position of shifter
Camaro = whole trans is rotated towards driver, shifter about same as Mustang
Astro Van -- pretty rare, supposed to be perfect for our trucks
Jeep ? not sure
There are Tremec TKO variants that have multiple shifter positions, $$$$, mostly for very high-HP duty TR-3550 TKO TREMEC 5 speed

A Mustang T5 will not clear the stock seat, unless a really radical shift lever is used.

I don't see it discussed much here, but if you go with a T5, especially the older S-10 variants, I'd spring for a short-throw kit with positive stops. The stock trans uses the shifter forks to limit travel. Problem is, the shifter forks are pretty flimsy aluminum. Banging a shift can break the forks. The good short-throw kits have bolts in the shifter housing to limit the travel (adjustable) at the lever. With the long shifter levers we need, not a bad idea for a kit anyway.
 
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Old Oct 13, 2013 | 12:36 PM
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hey TUG.
it is a t5 ,not ford or chev.for the ford tremec used a tall narrow "H" pattern and the shifter is located at the very back of the tail shaft.for the chev they used a short and wide "H" pattern and the shifter is located about 8 inches forward of the ford location.the tail shafts that house the shifter are interchangeable.so it depends witch t5 you use as to where it will end up with your seat(s).i put a set of buckets out of a 2003 dakota in my truck and the t5 is a 86 s10 tranny,it comes out of the floor very close to the front edge of the seats and in 2nd gear it was right into the side of the drivers seat.i heated the shifter up with a torch on the lower bend and straightened it up and away from the seat.works good now.
i hope this make sense,it sounds perfect in my head.
 
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Old Oct 13, 2013 | 12:37 PM
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well i see ross got it covered while i was typing.
 
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Old Oct 13, 2013 | 12:45 PM
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Originally Posted by Tug Hercules
I appreciate all the replies.

I missed soemthing in the last comment.

Will the shifter on a Tremec T-5 clear the seat or will I have to modify the tail shaft?

Thank you.

Tug Hercules
The tailshaft and tail housing assembly used on the TREMEC T5 transmission used in the chevy S10 trucks then the shifter will come out in front of the seat .
Like this.
 
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Old Oct 13, 2013 | 12:46 PM
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Originally Posted by vintage tin
well i see ross got it covered while i was typing.
You got it covered well while I was editing!
 
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