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Technical T-5 question

Discussion in 'The Hokey Ass Message Board' started by flattop49, Sep 8, 2006.

  1. flattop49
    Joined: Sep 4, 2006
    Posts: 23

    flattop49
    Member

    So i incidently may have picked up a t-5 ****** for my flathead. the guy i'm getting it from said that it came from an 80's four cylinder mustang. he also said that the first two gears on the four cylinder ****** are lower than the ones on the eight cylinder, allowing the four to pick up faster. can anyone confirm that?
     
  2. Rand Man
    Joined: Aug 23, 2004
    Posts: 5,375

    Rand Man
    Member

    I don't know, but I want to learn more about T5's. I think a low geared trans and a high (3.00?) rear would be a good combo for a light car likw a model A.
     
  3. kantgetnun
    Joined: Mar 21, 2006
    Posts: 278

    kantgetnun
    Member

  4. BigChief
    Joined: Jan 14, 2003
    Posts: 2,084

    BigChief
    Member


    Careful. The input shafts sizes are different a****st the 2.3 and V8 T5 in Fordworld. I believe the V8 pilot bushing snout on the input shaft is 0.668" dia and the 2.3L pilot snout diameter is 0.59" dia. You may also find that the input shaft clutch splines may have a smaller diameter and/or the shaft itself is longer or shorter than the Ford V8 T5s or the more commonly used GM S-10 T5 ******s. Figure out what adapters/bellhousings your using for the Flatty-T5 swap and verify that the 2.3 Ford T5 will indeed work. I know the in the 5.0 world they're avoided like the plague...mostly due to having a way too steep 1st gear for the V8 and being too weak behind the V8....of course "good" flattys are lucky to put out 175-200HP, so you might be OK with the 2.3 trans.

    -Bigchief.
     
  5. AlbuqF-1
    Joined: Mar 2, 2006
    Posts: 909

    AlbuqF-1
    Member
    from NM

    The 2.3 T-5's are the weakest, lowest torque rating available. The bearings are just not at all the same cl*** as the later models used in V8 Fords and V6/V8 Chev's. Aside from the dimension problems mentioned above, a flatty's torque in a car heavier than a 4-cyl Mustang could spell a short life.
     
  6. I thought all the flathead to t5 adapters were set up to take the GM ****** to bellhousing bolt pattern- might have to watch out if your trans is Ford pattern.
     
  7. Yeah, the 2.3L T5 has a steeper 1st gear. I think it was here I heard that a Tempo (I think) pilot bearing works to adapt to V8 T5 applications.

    Thanks,
    Kurt
     
  8. Flat Ernie
    Joined: Jun 5, 2002
    Posts: 8,406

    Flat Ernie
    Tech Editor

    Confirmed. The 2.3L T5 ge****ts are:

    1st - 3.97 2nd - 2.34 3rd - 1.46 4th - 1.00 5th - 0.79

    They are rated at 240lb/ft of torque (lowest Ford T5 rating) & the input shaft is 7.41" vs 7.18" for a V8 Ford. As mentioned, the input shaft is a smaller diameter, w/different spline count, & the pilot bushing is different too.

    This T5 will work behind a stock flathead, but will require so much modification to work with any of the standard adapters you will be money & time ahead finding a V8 Mustang or V8 Camaro that uses readily available adapters. If you need the shifter moved, find an S10 T5 to start with - it will live just fine behind most street flatheads.

    There are some adapters out there for the Ford bolt pattern, but the common Offy adapters (as used by Speedway, Cornhuskers, & others in their kits) is indeed for the Chevy pattern.
     

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