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Old 03-06-2007, 11:04 AM   #1
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Motor Home Transmission

I have been experiencing for several years a transmission problem and I am contemplating if I should get it repaired. The problem is when it is cold 30 degrees F or less the transmission when cold ( motorhome sat overnight) will slip until the engine runs for a couple of minutes. During the summer or warm weather there are no problems with slippage and you can put it in gear and take off as soon as you start the engine after not having been run all night. I was told that the seals in the transmission are probably at fault and having shrunk. They swell to the proper size when warm. Has anyone else experienced this problem and what did you do to correct it.
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Old 03-06-2007, 01:44 PM   #2
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I was having similar problems with my Explorer transmission and figured what did I have to lose, so I put in a can of Sea Foam conditioner and it works fine now. Sea Foam claims they soften seals and such. What the heck, cheaper than a tranny rebuild and if it doesn't work, then you still get the rebuild.
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Old 03-06-2007, 02:03 PM   #3
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Exclamation tranny

Hello
have you had the trans serviced? new fluids and filters.. If it keeps slipping it will burn up the tranny real fast. and most likly it will happen when you are miles from home.
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Old 03-06-2007, 02:24 PM   #4
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In some ways, you are lucky - the transmission is telling you it's worn out and in the not to far future is going to fail. As with engines, a factory rebuilt replacement is, in my opinion, the only way to go. Automatic transmissions are fairly complicated and have several critical clearances and set points. As a complete unit, simple to replace. Good luck!
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Old 03-06-2007, 03:13 PM   #5
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Gunner,
I had a full size Buick that did the same thing. I thought I had plenty of time to get the trans overhauled, but it burned up on the interstate one day with an outside temperature of below freezing.
When we got our 345, the trans was leaking fairly badly on the ground. There is a transmission shop here in Indy that I have had good luck with, so I had them overhaul our trans. That has been 15 months ago and 9000 miles. Works great.
Good luck, Rob
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Old 03-06-2007, 04:40 PM   #6
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Had the fluid and filter changed, dropped the pan to do it did not have it flushed. Did not find any metal shavings or anything else in the pan other than fluid. When I purchased the unit in Alabama over Thanksgiving over five years ago I had no problems with the transmission because it was warm when I started and drove straight through to Ohio. Even then when it sat overnight during the winter it would slip. Mechanics have told me that basically the seals will swell and not to worry about it but like everyone else I don't want to get stuck on the road.
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Old 03-06-2007, 04:42 PM   #7
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Rob can you provide an estimate cost for having the transmission pulled and rebuilt? What kind of warranty did you receive with the rebuild.
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Old 03-06-2007, 06:44 PM   #8
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Hi gunner what you described is front pump leaking inside , when it goes 1st and reverse are lost. 1 giant netrual. been there done that on my chevy pickup.
Bob
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Old 03-07-2007, 08:42 AM   #9
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Gunner,
I believe the whole job was right at $1200. Their warranty is 12 months or 12,000 miles. This is the third transmission I have had them do for me. All have been great.
Rob
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Old 03-07-2007, 11:51 AM   #10
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Gunner

To me it sounds as a torque converter drain back. The reason it take for few seconds before it starts moving is that your torque converter refils. Normaly the problem is the front bushing or the hub on the torque converter is worn out. Is your trans a hydro 400 3 speed? If your seals and o rings get hard they will also act the same way. It is a common problem for Ford.Chev. does not normaly do this, unless it is over 10 years old. The best way is to take the motorhome to a trans shop and leave it overnight so they can check it out cold.
Regards from Russell in sunny Tucson Az.
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Old 03-08-2007, 04:21 PM   #11
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Thanks for everyone's input. I am having a automotive garage giving me an estimate of either rebuilding my transmission or replacing it with a rebuilt one from Jasper.
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Old 03-08-2007, 04:26 PM   #12
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Jasper - JASPER - JASPER!!

Good luck with whatever you decide - It's possible I could be slightly opinionated. But I doubt it.
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Old 03-08-2007, 05:16 PM   #13
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What's the possibility of putting in a four speed or an overdrive transmission? I am still in the market to lower my RPM and increase speed.
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Old 03-08-2007, 05:46 PM   #14
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Kent's right. Now's the time to explore changing up to a newer 4 spd tranny. If you're going to go to a Jasper replacement why not go to an early 4spd without the computer stuff? I'm assuming the next version of the TH400 didn't need the computer and still shifted off vaccum.
So will the crowd now please educate us on what we would need to do... I'm sure the steering column would have to change for the 4spd unless a remote shifter leaver was used.
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