I just bought a 2006 4x4 MegaCab, Cummins w/48RE trans. It has a 4” lift & 33” tires. It has 95,000 miles on it and I know the previous owner who bought it with 8,000 miles. He ran the Bully Dog for the options, but ran it on a stock tune. When I got it, it was shifting erratically, but he hadn’t adjusted for tire size, so I tried that first. I had owned it for 6 days before this story began.
Here’s the story I was on the freeway (65-67mph), changed lanes & hit an uneven section of the road, it was a filled crack, maybe a 1-2” lip, the truck started shaking violently. I thought I was losing a wheel. When I started to slow down, it quit. About 10 miles later it did it again, on another small bump in the road. It was shaking so bad that the cars behind me started backing off. I pulled over and eyeballed everything & it all looked good. About 10 miles later I arrived at my house, I parked it for about an hour & when I came back out there a small puddle of tranny fluid underneath, coming from the front of the bell housing. I thought maybe the front seal. Prior to this, it had never leaked a drop on my drive way.
I took it to the tranny shop and they looked at it and told me the shacking probably had nothing to do with the leak, just a crappy coincidence. They check the fluid and it was aerating and crawling up the dipstick about 3”. We figured that because of the aeration, it was causing the fluid level to get so high that it was coming out of the vent. We hoped for a bad or loose, tranny filter or seal. The following 3 days it leaked sporadically, one day not at all, one time a lot, and one night just a little.
Three days later, we serviced it and everything looked good, the fluid smelled and looked burnt, but there was absolutely no debris in the pan or on top of the filter, just a little bit of slime on the magnet. We replaced the governor & sensor, and put on a new filter. Now the shifting issue seems to have been corrected, likely from the governor, but the fluid is still aerating and seeping out of the vent. Or I have a bad seal and an aeration problem.
The aeration problem is a big one, because it is burning up my fluid and I know that it is causing internal damage. The tranny shop wants to rebuild the whole thing, but I can’t afford that, I just spent all my damn money on buying the truck. Not to mention, if they rebuild it, beef it up and put heavy duty TC and Shift Packs, etc. Like they want to, who’s to say that the aeration problem goes away? I’d love to beef up my tranny, but right now I just need to fix the problem and keep it going until I can afford to get it built.
Does anyone have any ideas or suggestion for this aerating problem? I can’t find anything online other than “It’s over filled” when in fact we sucked some fluid out so it was at the bottom of the hash marks, let the truck idle in N and over a 5 min span we continued to check the fluid and it crept up over 2” past the top of the hash marks. Throughout this whole ordeal, the trans usually runs about 125-150 degrees, the most it has ever got was 165 and that only happened once.
** On a side note - My father in-law figures that the shaking is a "death wobble" from bad track bar bushings. Parked with the truck off, wiggling the steering wheel I get about 1/16th" of movement on the driver’s side. I think they are all correct and it has nothing to do with the tranny problem, but DAMN what a weird coincidence. ***
Thanks in advance!
have the same problem?
Friday, December 9th, 2011 AT 5:56 PM