HT740 slipping

Scott & Heather · July 23, 2020, 08:08:25 PM

I would just replace the trans. I have a contact here in Maryland that knows the HT740 like the back of his hand. But honestly for the price of one, I'd just swap them out. Not hard to do. I also have been there done that.

luvrbus · July 24, 2020, 05:59:33 AM

The wafers probably broke in the lockup,the 740 Allison are simple if you have all the special tools and the Coach Guard is a Allison factory rebuild for MCi if the price is right go for it

lostagain · July 24, 2020, 06:28:30 AM

I am going to start pulling the engine/trans today, to swap with the rebuilt Coach Guard. Maybe later I can look into my broken one when it is on the bench, er... floor. Doing it in frame, upside down, with oil dripping on me, was no fun. Plus, like I said, it is beyond my abilities. Plus, once the engine is out, I can tidy up and clean up in the bay, and paint the engine. Then I can leave the doors open at bus rallies, ha ha!

buswarrior · July 24, 2020, 08:32:42 AM

Rattle can rebuild?

Good choice, leave transmission testing and re-building to the folks who do it every day.

Happy coaching!
Buswarrior

Utahclaimjumper · July 24, 2020, 01:01:12 PM

You may even see other items that need attention that you could not see with the engine in frame..>>>Dan

Tom Y · July 25, 2020, 04:54:02 AM

Have you pulled the engine before? i can post a pic of the frame i made for mine.

Raymond smith · July 25, 2020, 06:32:01 AM

I would like to see it. I have to pull my motor to change a clutch when i save up for one. Darn expensive. Thanks Raymond

lostagain · July 25, 2020, 06:55:21 AM

I am half way through disconnecting coolant hoses, wires, etc. I have a dolly/frame thing I built when I pulled the engine out of my Courier 96, thanks. I just have to put bigger and stronger caster wheels on it. They were marginal for the 4-71.

Tom Y · July 25, 2020, 06:18:40 PM

Not much to show but, it works. I block up the rear of the bus to match and just tie frame to bus. Use a come along and slid motor and trans on to frame then lift off to move. Set motor on frame and come along back in to bus.

Dave5Cs · July 25, 2020, 10:19:22 PM

JC sorry I am not closer or I be there with you helping. Because I know about the same on auto- Tranny's as you. LOL So I will just send positive energy to you. Did it help ?.....

lostagain · July 26, 2020, 07:06:46 AM

Thanks Dave. I need all the moral support I can get...

So I am going to go get this Coach Guard rebuilt transmission. It has been sitting for a few years. Inside, the seller assures me. A thought came to me in the middle of the night: I should have it dynoed, to make sure it is good before I install it. Is that a good idea? I would hate to install it, and find out on the first test drive that it is no good. It is so much work installing it, it seems like a few hundred dollars for a bench test would be worthwhile, no?

JC

buswarrior · July 26, 2020, 07:21:26 AM

Absolutely, if funds and the geography of the test centre make it practical.

Gambling costs too?

Happy coaching!
Buswarrior

Utahclaimjumper · July 26, 2020, 08:15:16 AM

You could also make the sale dependent on the test results..>>>Dan

DoubleEagle · July 26, 2020, 08:28:12 AM

Does the seller have documentation from the re-builder, and are there appropriate ID plates and tags on it? Is it totally clean or painted? If it is a unused rebuilt with a guarantee (probably now expired), it might not need dyno testing, if everything is above board.

luvrbus · July 26, 2020, 10:09:56 AM

The seller in this case would make the deal good if there was a problem I know him ,the dyno test is not going to cheap,If it wasn't for the freight both ways Penske would have been a better deal