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48re puking fluid out front pump

413 Views 6 Replies 2 Participants Last post by  dsldude
So, i thought my 04 cummins with the 48re had a front pump leak. I was idling the truck for an extended amount of time roughly 2 min high idle around 1000 rpm, in 32f temps. It started puking fluid. I pulled the tranny, decided to do a rebuild myself which i have done before, put back and it does the same thing. Any ideas?

On another note, after this rebuild, the tranny warms up a lot quicker and seems to be running warmer in general. It has delayed shifting 1-2 and 2-3 now. It also has a bit of a whirring noise under heavy load and doesn't seem like it's laying down as much power as before.

I added alto clutches, added a 6th clutch to od brake, billet servos, accumulator, and billet shafts. It has a muldoons standard vb that worked fine prior to rebuild and only has about 10k miles on it.
1 - 2 of 7 Posts
I would double check fluid level .
Make sure lines and coolers good.
Perform complete pressure test help to narrow down issue.
What has fluid and filter /pan debris looked like might give a clue on an internal issue.
If you had same issue with original build, what did fluid/pan look like before rebuild ,could give a clue if its hard parts issue.
Biggest heat source is typically converter and they can whine ,
What brand ? did you replace?
Otherwise really a whine could be a lot of things, help narrow down make sure no cooler or line issues I would check pressures , drop pan after a few hundred miles check for debris.
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