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5.3 into trans am

This is a discussion on 5.3 into trans am within the General Help forums, part of the LSx Technical Help Section category; I just purchased a 5.3 from a 2004 silverado to put in my trans am. Just wondering if i need ...

  1. #1
    its short but its skinny. jiveass's Avatar
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    99 trans am

    5.3 into trans am

    I just purchased a 5.3 from a 2004 silverado to put in my trans am. Just wondering if i need to use my ls1 oil pan and other stuff on this engine. I know i have to swap intakes, but what else?

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    Senior Member tatertot91's Avatar
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    Sunset Orange Metalic
    2001 Camaro SS

    Oil pan and accessories, pretty sure the water pump is different and alternator/accessories are located differently.

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    Member flybird's Avatar
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    Mid Night Blue
    1999 Firebird 3.8 series

    + harness, computer. Or flash and reprogram the computer.

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    its short but its skinny. jiveass's Avatar
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    99 trans am

    stock tune should work ...i know the harness will. only other thing i need to do that i know of is drill and tap the hole for the alternator bracket

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    Moderator Firebirdjones's Avatar
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    Swap everything over, from the oil pan to the accessories.

    Stock tune "might" get it started and running, but I wouldn't run around with it anymore than you have to. A 5.3 will require completely different timing and fuel maps.

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    Is the crank reluctor still 24x on an '04? I have no idea.

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    its short but its skinny. jiveass's Avatar
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    99 trans am

    anyone know the turnaround for a mail order tune from frost?

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    3-5 days total once you drop it in the mail. He generally gets them back out within a day of receipt.

  9. #9
    its short but its skinny. jiveass's Avatar
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    yea its a 24 tooth still...i made sure to research that ..(after i already paid for it) lol...sounds like ill be contacting frost...

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    James Bond Spikito's Avatar
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    2001 3.8 Black - sold
    2000 SS Black M6

    i ordered a new PCM from him, didnt mail mine, i had it in my hands in just over 24 hours from the time i paid, and Jiveass, I'm not too far from you

  11. #11
    its short but its skinny. jiveass's Avatar
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    99 trans am

    glad to hear that....i want this thing on the road asap!

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    Member flybird's Avatar
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    Mid Night Blue
    1999 Firebird 3.8 series

    Hope everything works out! Post some pics and vids when your done!

    Just dont drive on that normal tune, you'll get all sorts of malfunctions! (ask me how I know...)

  13. #13
    its short but its skinny. jiveass's Avatar
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    99 trans am

    got my engine saturday....

    my son removing the intakeand exhaust manifolds


    my son cleaning the engine


    and a few hrs later...threw a quick spray can job on it...nothin too fancy.



    i stll need to swap my fbody oil pan, replace the transmission seals, and drill and tap alternator hole....after that...it all goes together and back into the car...

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    Looking good.

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    She-Member jrbonds's Avatar
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    Looks good! I got my lq9 in over the weekend. I'm waiting on my tranny to be finished.

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    Senior Member tatertot91's Avatar
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    Sunset Orange Metalic
    2001 Camaro SS

    Looks pretty good mike
    Look forward to seeing it in the car

  17. #17
    its short but its skinny. jiveass's Avatar
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    Quote Originally Posted by tatertot91 View Post
    Looks pretty good mike
    Look forward to seeing it in the car
    you and me both...had to thoroughly clean my oil pan in the varsol tank today to get all the metal shavings out....still need to drill and tap alt hole...got all the accessory brackets cleaned up...hoping to have it in this weekend...now if someone can answer my oil pan gasket question in the external engine section lol
    Last edited by jiveass; 03-22-2012 at 06:17 PM.

  18. #18
    its short but its skinny. jiveass's Avatar
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    Quote Originally Posted by jrbonds View Post
    Looks good! I got my lq9 in over the weekend. I'm waiting on my tranny to be finished.
    didnt you just replace your engine?

  19. #19
    Member JacobLS1's Avatar
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    1998 Z28

    Hate to be a noob. But what is the reason to put a 5.3 in your T/A?

  20. #20
    She-Member jrbonds's Avatar
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    2002 WS6
    1965 Mustang

    Quote Originally Posted by jiveass:2758854
    Quote Originally Posted by jrbonds View Post
    Looks good! I got my lq9 in over the weekend. I'm waiting on my tranny to be finished.
    didnt you just replace your engine?
    Yep. But it was a used engine, and sadly 3 weeks of it working in my car. The oil pump went bad and I spun some rod bearings. This time I got a lq9 and no parts other than the intake, oil pan, block, etc is used.
    Last edited by jrbonds; 03-23-2012 at 10:00 PM.

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