MCI 96A3 6V92 and 740 Rebuild

brettpearson67 · May 01, 2019, 01:00:00 PM

Ok, so I am going to hopefully prepare a parking pad for the bus next to the house this weekend, and start working on removing the engine and trenny. I have decided to go ahead and rebuild them.

I will rebuild for 350HP and add Jakes. I also plan on adding a charge air (Inter?)cooler, and possibly removing the aftercooler. I will be doing the work myself, hopefully with the help of my children.

Do I need to go with a different port size on the liners?
I know the injectors will need to be upgraded.

Has anyone here rebuilt a 740? How big a job is it?

Any help and advice would be greatly appreciated.

Thanks

Brett

luvrbus · May 01, 2019, 02:16:04 PM

740's are not hard to rebuild if you have all the specialty tools,? why take it Allison and have a Dyno test first it may need nothing but adjustments or minor valve body work

brettpearson67 · May 01, 2019, 03:00:47 PM

Quote from: luvrbus on May 01, 2019, 02:16:04 PM
740's are not hard to rebuild if you have all the specialty tools,? why take it Allison and have a Dyno test first it may need nothing but adjustments or minor valve body work

I want the engine and tranny to be fresh, to reduce risk of breakdowns on the road.
Does a dyno test require taking the bus in, or just the tranny?
Bus has oil pressure and coolant in oil issues.

luvrbus · May 01, 2019, 03:15:15 PM

Just the transmission they will flush it and do the setting like the shift points to match the engine the 740's last a long time and you will spend a bundle on tools like to remove the snap ring from the torque converter H/F doesn't sell the tools needed I can tell you that

brettpearson67 · May 01, 2019, 04:13:00 PM

Quote from: luvrbus on May 01, 2019, 03:15:15 PM
Just the transmission they will flush it and do the setting like the shift points to match the engine the 740's last a long time and you will spend a bundle on tools like to remove the snap ring from the torque converter H/F doesn't sell the tools needed I can tell you that

Good tip. Thanks
What's H/F?

luvrbus · May 01, 2019, 04:18:11 PM

Quote from: brettpearson67 on May 01, 2019, 04:13:00 PM
Good tip. Thanks
What's H/F?

Harbor Freight the Chinese store lol Kent Moore rips you for those tools for the Allison but you have to buy from Kent Moore

brettpearson67 · May 01, 2019, 04:28:37 PM

Quote from: luvrbus on May 01, 2019, 04:18:11 PM

Harbor Freight the Chinese store lol Kent Moore rips you for those tools for the Allison but you have to buy from Kent Moore

Ok thanks:)

Dave5Cs · May 01, 2019, 09:15:47 PM

Eric Smidt is an American businessman. He is Chairman and CEO of Harbor Freight Tools, which operates over 800 retail hardware stores in 47 states and generated revenue of approximately $2 billion according to an April, 2018 Moody's Investors Service report.

Harbor Freight Tools. Harbor Freight Tools is a privately held discount tool and equipment retailer, headquartered in Calabasas, California, which operates a chain of retail stores as well as a mail-order and eCommerce business. The company has over 900 stores in 47 states.

brettpearson67 · May 02, 2019, 04:39:14 AM

Well, that's 1.5 minutes of my life I'm never getting back.😫

DoubleEagle · May 02, 2019, 07:27:31 AM

Quote from: Dave5Cs on May 01, 2019, 09:15:47 PM
Eric Smidt is an American businessman. He is Chairman and CEO of Harbor Freight Tools, which operates over 800 retail hardware stores in 47 states and generated revenue of approximately $2 billion according to an April, 2018 Moody's Investors Service report.

Harbor Freight Tools. Harbor Freight Tools is a privately held discount tool and equipment retailer, headquartered in Calabasas, California, which operates a chain of retail stores as well as a mail-order and eCommerce business. The company has over 900 stores in 47 states.

That's wonderful that an American business man can make a lot of money selling Chinese made tools, but Cliff's point is that they do not provide the serious tools necessary for overhauling an Allison. For the price, some of their stuff can provide some value, but they have a long way to go before they can be regarded as a good source for tools. Which states are they not in?

chessie4905 · May 02, 2019, 11:48:10 AM

Walter, do you have any Harbor Freight tools or equipment?

Dave5Cs · May 02, 2019, 12:53:41 PM

Walter I know that I was just messin with Clifford like he does to me, LOL

And actually I have used a lot of their tools with no problems...

DoubleEagle · May 02, 2019, 08:35:14 PM

Quote from: chessie4905 on May 02, 2019, 11:48:10 AM
Walter, do you have any Harbor Freight tools or equipment?

Oh yes, I have strayed from the path of Wright, Snap-on, SK, and Proto, but I have always been disappointed. I have a scrap metal pile with some of their stuff in it. Even their zip-ties don't work well. I will not use their jacks, or jack stands. There are other brands that are made in China that are decent, but I'm not betting my life on Harbor Freight. I think the only thing left that I have from them are some solid wheels for a hand truck (so far, so good).

bigred · May 04, 2019, 12:41:03 PM

Clark equipment co has a place in Greensboro that rebuilds Allison transmissions .This bunch put a royal screwing on me but have been told that they really know their stuff about rebuilding Allisons if you only deal with their main rebuilding centers.NEVER NEVER get involved with their Road side machinic's or any of their little Hole in the wall garages.The main advantage for using them would be availability as they usually have exchange units on hand.

luvrbus · May 04, 2019, 12:50:34 PM

FWIW most construction equipment dealers of any size does the Allisons and dyno work