Home » Public Forums » GMCnet » Before Dropping the Transmission (Just making sure there is not another option)
| Before Dropping the Transmission [message #267480] |
Fri, 12 December 2014 19:29  |
Jeff102410
Messages: 18
Registered: February 2012
Location: Arlington, TX
Karma:
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Junior Member |
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Here's the situation:
Over Thanksgiving, we took the motorhome out for the weekend. Arlington, TX to the beach at Galveston, TX. Four hours each way.
On the way home, half way, we stopped at a rest stop (Buc-ee's in Madisonville, TX if it matters to anyone). Parked slightly uphill.
Getting ready to go, started the coach as usual. Since I'm not always sure if I'm in drive or 2, I shifted into reverse, held a second, shifted into neutral, held a second, and shifted into drive.
Immediately on shifting into drive, I heard a pop, more like a bang...whatever...not normal...and not a good noise. Gave it a little gas and was roalling backwards...not good. Hit the brakes, put it back into park and shifted again...same result. Put it into park and jumped off the drivers seat to get ready to pull the hatch, and was rolling backwards again...still in park. Holy crap, Batman...
Grabbed the emergency brake...and...well...you know this was not going to end well. Ultimately, towed back to the house. My call. Expensive, but we are home and I can work the coach without the pressure of being remote...
Anyway...
I've got the coach up on jacks. Pulled the transmission pan, and everything is as expected. No metal in the fluid. The shifter is attached, and when I manually move the shifter, things seem to be moving as expected...at least as far as I can tell.
Pulled the final drive cover, and everything here is as expected. No metal in the fluid. Visual inspection does not see anything unexpected.
Something else to note...and this test is not the same as having the weight of the coach, but with the frame on jacks and no weight on the wheels, the wheels turn as expected. When I spin the drivers side wheel, and with the coach in park, the passenger wheel turns in the opposite direction. In neutral (and reverse and drive), the passenger wheel turns in the same direction. Again, this test was done by rotating the wheels by hand. I don't know if that means anything, but putting it out there just in case it does.
Another tid bit is that regardless of what gear the coach is in, the engine revs up as expected. There is no additional noise, grinding, whatever.
Transmission is a 2010 Manny rebuild with 3800 miles on it. Called Manny, but he has not heard of a transmission doing anaything like this.
Final drive (3.55) was purchased from Jim K. the same time as the transmission.
What I am thinking is that I'm at the point that I have to start taking stuff in order to find the problem...not something I'm wanting to do if there is another alternative...
So...
The ask here is...is there other stuff to check before dropping the transmission??? final drive??? etc.???
Jeff Rogers
Arlington, TX
1978 Former Palm Beach
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