Eagle drop box input cover loose

[luvrbus]

Same drop box RJ they interchange no problems but the rear axle is different the Eagle has lager axles,cage and spider gears I guess because it was a 40ft 3 axle bus

[RJ]

So the idea I had about putting a 3.38:1 pumpkin & drop box out of an Eagle won't work, except for the drop box, eh?

Darn. . .

[Ed Hackenbruch]

What do you have in there now  RJ?  On my 5A the 3.36 was standard and the 3.7 was optional.

[luvrbus]

I bet he has the standard 4:11 with the 6V71 same as JC had before he went to the 3:36

[Ed Hackenbruch]

I bet you are right, the 5C with the 6v71 was a different animal.    I wonder why they went with that instead of the 8v71.

[RJ]

I bet you are right, the 5C with the 6v71 was a different animal.    I wonder why they went with that instead of the 8v71.

Ed -

Yes, my 5C has the 4.11:1 rear end. 

Apparently, back when the coach was new, if you ordered a 5C with an automatic, you got the 6V71/MT644 combination with a 4.11 rear end.  If you didn't order the automatic, you got an 8V71/8844 Spicer with a 3.7:1 final drive.  At the time, it was "space considerations" that they gave as the reason.  Also, from what I've been able to gather, the majority of non-Saudi 5Cs were ordered by operators doing airport shuttle service, not long-haul revenue or charter work.  Thus the more transit-like gearing.

I'd like to find a 3.36:1 rear pumpkin that would fit.  I've got a 6V92TA/HT754 powertrain available to me for a VERY reasonable sum, so the 3.36 would be ideal.

RJ

[luvrbus]

RJ I heard there were a lot of 3:36 for MCI in Canada ask Joe on the BNO he knew of several last year for something like 600 bucks ea

[sledhead]

my coach has the 333-1 on the pumpkin and would love to have the ht 754 and found 1 but never could find the electronics for it that are missing 

dave

 

[Tom Y]

I was told the rear in my 5C came from an Eagle,3.36. I wish now I had the 4.11 back as I changed from the 740 to a Allison 6 speed. Only programed for 5 speed now with the 3.36.  

[lostagain]

When I swapped the 4:11 for a 3:36, I replaced the ring and pinion gears. I didn't remove the rear axle carrier and pumpkin. I got the 3:36 guts from a charter operator near Red Deer AB. I paid a lot more than $600. Like around $2500 IIRC. Including a spare drop box. Worth every dollar though. I still have the 4:11 gears if anyone is interested.

I remember at Brewster's in 1977 getting several new 5Cs with the 6V71 and automatic. They were slow and sluggish. A shame, because they were such a nice bus otherwise. But they were only used locally, not for charters or anything long distance. They didn't have bathrooms either. We used 5As and Bs with the 8V71 and 4 speed Spicer for that. Also MC7s and 8s, which were all fairly late models then.

JC

[luvrbus]

I checked with my gear supplier in Houston he tells me $2180.57 plus shipping is the best he can do on a 3:36 ring gear and pinion with bearings for the MCI 5 last one I purchased one 6 years ago cost $1400.00 with shipping.
I would check with Joe he told me on the phone he knew of a couple about 50 miles from him I was just after the drop boxes.Only Eagles I knew of using the 3:38 was the model 15 fwiw 

[chessie4905]

   Does the drop box cover have any alignment dowels? They usually help control cover movement. Also after torquing with either Loctite or wire the bolt heads. if no dowels, you could install 2 or more studs in place of bolts to control movement.

[luvrbus]

The problem with the drop boxes are the shims are the gasket once you get it tight they don't leak unless someone decided to use the RTV silicone or it has a bearing problem or a drive shaft problem if the nut is not torqued on the yoke and input shaft it will loosen the 3/8 bolts also   

[azdieselman]

I'm wondering if the threads in the case are worn/loose. That would allow the tension to relax and the bolts will back off some. You can clean the threads with brakeclean and blow them dry. Try the green or blue loctite with some new bolts. Let it set overnight if possible.

You can use "gasket eliminator" on those shims. It is designed for use in joints without a gasket/seal. It is very thin and will stop the seeping. You just need a single bead, No need to paint the entire shim. I know CAT sells it, Detroit uses it on the S60 and others

[chessie4905]

   Maybe the driveshaft should be checked  or balanced by a shop that does it and  ujoints could be worn from many miles and look good otherwise. On a large vehicle, vibrations may be not as noticeable or be blamed or incorrectly attributed to tires.