4.9 RWD 5 speed
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HT4100 4.1, 4.5, 4.9 Discussion, 4.9 RWD 5 speed in Cadillac Engine Technical Discussion; Not in a Caddy body but wanted to post this here as an old (2003) thread lead me to the ...
  1. #1
    scrabblegod is offline Cadillac Owners Member
    Join Date
    Oct 2004
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    8

    4.9 RWD 5 speed

    Not in a Caddy body but wanted to post this here as an old (2003) thread lead me to the parts.

    The engine is the 4.9 out of my old Fiero and is going into a scratch built copy of an old Lotus 7.

    The transmission is from a 1989 Supra Turbo.

    The bellhousing (the magic to make the swap work) is from a 96-99 Dodge Dakota 2.5 4 cyl engine. It has the GM 60 degree bellhousing pattern and the large Aisin transmission flange.

    With over 225hp at the rear wheels and a weight around 1500lbs, it should be a fun ride.








    Gene

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  3. #2
    ChadTanner is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Apr 2008
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    Re: 4.9 RWD 5 speed

    what are you using for a pilot bushing,flywheel and related things?

  4. #3
    scrabblegod is offline Cadillac Owners Member
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    Oct 2004
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    Re: 4.9 RWD 5 speed

    Quote Originally Posted by ChadTanner View Post
    what are you using for a pilot bushing,flywheel and related things?
    The flywheel is from a 91 Cavalier 3.1 that is plugged and redrilled to the Caddy crank pattern. This flywheel is common in the 4.9 standard shift conversion in Fieros.
    In the Fiero, they use an upgraded Cavalier clutch and pressure plate.

    I will be using the taller pressure plate style from the S-10, as this allows me to go to a stronger rebuildable Borg and Beck style pressure plate. The clutch shop is putting a stiffer diaphram in it.

    The clutch disc will be an assembled unit using a Nissan hub and backing/lining from his catalog. It will be a woven Kevlar.

    The pilot shaft on the trans is what the clutch guy called a common size (though I am not sure what it was). When I go back this Thursday to pick up my clutch, I will take him the size of the pilot hole in the Caddy crank and he will check for an off the shelf bushing. If one is not available, he will supply one slightly larger, and I will turn it down to fit.

    With the height of the Beck pressure plate, I should be able to use the stock Dakota clutch fork and throwout bearing.

    I will post more info and some pics when I get the parts together Thursday.

    Gene

  5. #4
    ChadTanner is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Apr 2008
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    42

    Re: 4.9 RWD 5 speed


  6. #5
    ChadTanner is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Apr 2008
    Posts
    42

    Re: 4.9 RWD 5 speed

    The pilot shaft on my audi transaxle is the same size as the early chevy manual trans,I forget the exact size,but is just under 1/2 inch.The converter alignment hole in the cadillac crank is alot smaller than most pilot bushing holes.As you can see there was not much bushing left after turning the OD of the chevy bushing to fit.

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