Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 12, 2025 ...

Hole in housing between cummins 8.3 and allison transmission?

April 27, 2011, 01:38:47 am

Hello all-new to me 92 foretravel ORED, first time foretravel owner(have always dreamed), got rid of SOB.  I know this probably sounds stupid, but bear with me, newly converted from 454 to cummins pusher!  As I was examining under the drivetrain, there is a hole in the bellhousing? between the motor and transmission.  It appears to be a large drain hole without a plug?!  The fluid levels are fine and she runs great!  Is this supposed to be plugged and/or hold fluid?  Please help, and please excuse the ignorance!

Thanks,
Doug

Quote Selected

Re: Hole in housing between cummins 8.3 and allison transmission?

Reply #1 – April 27, 2011, 01:58:33 am

I'm guessing a inspection hole, at least if it was between the engine and a manual transmission, it would be a inspection hole.

Quote Selected

Re: Hole in housing between cummins 8.3 and allison transmission?

Reply #2 – April 27, 2011, 07:14:12 am

Put a plug in the hole to keep dirt out of the housing.  Remove the plug at each oil change to check for rear main seal leakage.

Quote Selected

Re: Hole in housing between cummins 8.3 and allison transmission?

Reply #3 – April 27, 2011, 07:34:50 am

Doug,

Welcome to ForeForums.  There is no need to worry about asking a question of any sort.  You won't get flamed here.  You will only get good answers as you can see.  Congratulations on becoming a Foretravel owner. 

Quote Selected

Re: Hole in housing between cummins 8.3 and allison transmission?

Reply #4 – April 27, 2011, 09:16:56 am

You have me curious. You said your coach was converted from a 454 GM gas to a Cummins 5.9? Is it front engine or a pusher? Were you involved in the conversion and if so what is the approximate cost of the changeover?

Quote Selected

Re: Hole in housing between cummins 8.3 and allison transmission?

Reply #5 – April 27, 2011, 10:15:32 am

Good morning Doug,

Not a Ford 460? You will love the 5.9. Probably the best engine that will get you down the road at a good speed and use less fuel than anyone else. Not a bad thing today. Should last forever with regular oil changes. Lots of easy ways to make a 5.9 fly if not fast enough for you. How do you like the rear end ratio? RPM @ 60?

Hole is probably inspection port like noted above. Lots of vehicles with them.

Pierce & Gaylie
93' U300/36

Quote Selected

Re: Hole in housing between cummins 8.3 and allison transmission?

Reply #6 – April 27, 2011, 01:31:12 pm

Sorry for the confusion.  The SOB rig i just got rid of was a 454.  My new-to-me foretravel is a grandvilla, 8.3 cummins, 250 h.p. with an allison tranny.  This was not a conversion.  I was just stating that I'm not use to the diesel set-up yet, as my old motorhome was a 454.

Quote Selected