Maybe I can make my problem more clear: Can an externally ballanced 454 be adapted to a 4590 series new Process 5 speed Trans.? I was told that it came out of a school bus which required an oversized fly wheel and clutch (14"). The fly wheel is unballanced smooth on back (no cast in lobe) if there was a ballance adapter plate, it got lost in the shuffle. I've spent big bucks having it completly rebuilt, so would be greatful for any help.
Ballance still unresolved
- Thread starter gbindoso
- Start date
Tacoma
Et incurventur ante non
- Location
- far enough away
heh, yeah, it can but it's gonna be a real pain. That transmission, if it's the one I'm thinking of, uses a fairly rare SAE #2 bellhousing for Chevy engines, not a real common item. It is most commonly found in early medium-duty trucks (school buses, dump trucks). Also, a lot of those MD 5spds are not overdrives, which begs the question: why go through the trouble to adapt this oddball to your engine???
anyway. Not sure this really helps you. :-\
anyway. Not sure this really helps you. :-\
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Thanks for your response Tacoma, actually it has an adapter plate that moves the starter out to be able to engage the larger flywheel.
It seemed like a good idea at the time, I liked the idea of the of the transmission as I pull a goose neck trailer with a backhoe loaded and other heavy loads. The fact that I am so far into this, It seems if I can just find the proper adapter balance plate the problem would be solved.
This leads to another question, if I can find the right adapter to balance the 454, Would the oversize flywheel still create a balance problem?
It seemed like a good idea at the time, I liked the idea of the of the transmission as I pull a goose neck trailer with a backhoe loaded and other heavy loads. The fact that I am so far into this, It seems if I can just find the proper adapter balance plate the problem would be solved.
This leads to another question, if I can find the right adapter to balance the 454, Would the oversize flywheel still create a balance problem?
- Location
- Bountiful, land of rocks
That'd be my concern. That motor needs to be balanced or it'll tear itself apart (I'm sure you're aware of that and that's why you're answering the question
) I would call a machine shop and see if you can get some qualified commenters They have likely dealt with some medium duty stuff and could give a definitive answer
- Location
- farmington
What did your machinist say?
Tacoma
Et incurventur ante non
- Location
- far enough away
Alright. You made me bust out the interchange manuals. This is culled from GM, so, take it FWIW.
--- ALL big blocks are externally balanced with the exception of: 366, 366 tall deck (those are useless truck motors w/tiny bores), the 396, 402, 427, and 427 tall deck (another truck motor, and useful for building big-inch torque motors).
-- the externally balance engines require externally balanced flywheels (casting numbers available if you want them..).
-- according to my memory from adapting a tall-deck 427 to a Deuce 5spd using SAE bellhousing etc, You will need to source the medium duty flywheel, and have it weighted for use on the later crank in your later engine.
http://www.jpmagazine.com/techarticles/drivetrain/154_0509_spicer_3053a_transmission/, has some good info, patterned after my friend Tom's swap. Speaking of his tall deck/deuce swap-- I am looking for it archived on steelsoldiers.
--- ALL big blocks are externally balanced with the exception of: 366, 366 tall deck (those are useless truck motors w/tiny bores), the 396, 402, 427, and 427 tall deck (another truck motor, and useful for building big-inch torque motors).
-- the externally balance engines require externally balanced flywheels (casting numbers available if you want them..).
-- according to my memory from adapting a tall-deck 427 to a Deuce 5spd using SAE bellhousing etc, You will need to source the medium duty flywheel, and have it weighted for use on the later crank in your later engine.
http://www.jpmagazine.com/techarticles/drivetrain/154_0509_spicer_3053a_transmission/, has some good info, patterned after my friend Tom's swap. Speaking of his tall deck/deuce swap-- I am looking for it archived on steelsoldiers.