1990 class a motorhome e4od overheating

Reply Subscribe

Thread Tools

Search this Thread

Dec 9, 2010 | 02:58 PM

nhcouple

Thread Starter

New User

Joined: Dec 2010

Posts: 4

Likes: 0

1990 class a motorhome e4od overheating

I have a 1990 Newport by cobra class a motor home 30 feet long towing a 1995 jeep grand Cherokee Laredo. It has the 460 FI engine and e4od transmission with 72,000 miles. The transmission has a Derale oversize pan with cooling tubes, temperature gauge sending unit and it holds 6 extra quarts of fluid. I have installed a 12 volt pusher fan on the forward mounted cooler. Fresh wolf synthetic transmission fluid. Now the Problem! When towing transmission shifts like its brand new but on long grades trmp goes from 135 to 200 and come out the vent and causes smoke when it hits the exhaust. I had a brake light sticking issue but thats fixed. There are no stored codes.

Please Help

Dec 9, 2010 | 03:22 PM

Kajtek1

Postmaster

Joined: Apr 2006

Posts: 3,524

Likes: 2

From: CA Bay Area

200F is still low temperature for transmission. Where do you have sensor installed?
The senor is not reading the actual transmission temperature, or something else is wrong.

Dec 9, 2010 | 03:46 PM

nhcouple

Thread Starter

New User

Joined: Dec 2010

Posts: 4

Likes: 0

sending unit is in the oil pan but at 200 oil comes out the vent on top and leaks onto the exhaust

Dec 9, 2010 | 06:58 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,725

Likes: 2,651

From: SE Florida

If it's coming out of the vent the trans is overfilled.

Dec 10, 2010 | 07:01 AM

nhcouple

Thread Starter

New User

Joined: Dec 2010

Posts: 4

Likes: 0

transmission is not overfilled level is between the dots.

Dec 10, 2010 | 07:23 AM

DavidB

Elder User

Joined: Jan 2002

Posts: 780

Likes: 0

Cold or hot

Between the dots cold or after driving at least 25 to 30 miles? What type of guage/sending unit do you have?

Dec 10, 2010 | 07:34 AM

nhcouple

Thread Starter

New User

Joined: Dec 2010

Posts: 4

Likes: 0

when we noticed smoke we pulled into a rest area and checked the level. We had been driving for about 5 hours. i am using a glow shift gauge and sending unit installed at filter pickup level in the derale oversize cooling pan