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Old 08-22-2009, 08:41 PM   #15
Full Timers/Diesel power.
 
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1983 31' Airstream310
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No way it could have been a Allison, but some parts interchange into the 475; that's what makes a hot rod trannie.
What does "no longer at Inland RV" mean, is that some kind of in-joke? I don't get it.
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Old 08-22-2009, 09:41 PM   #16
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What does "no longer at Inland RV" mean, is that some kind of in-joke? I don't get it.
Did I miss something?
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Old 08-22-2009, 10:01 PM   #17
Full Timers/Diesel power.
 
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Did I miss something?
I must have; seemed like Terry had found a home.
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Old 08-23-2009, 10:48 AM   #18
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Angry More information

Thank you everyone for your input. The original $500 covered tightening the torque converter bolts. He said they were hard to reach and they were a little loose. That part was $200. Then he charged me an additional $300 to straighten out the pan, cut out part of the cross member that was rubbing the pan and fix a couple of leaks near the bottom of the pan. At that time he never removed the transmission. I picked up my motorhome only to hear the sound still there. I think as it warm up it gets louder. I promise my family a short drive to the beach and returned the motorhome to the mechanic. He thought it was in the engine. I said disconnect the transmission so we know for sure. After having several mechanics including a diesel mechanic (which said the engine sounds tight) he discovers a hard to see crack in the flexplate. Which was my original assumption. He told me it would take eight hours to fix but because he did not find it the first time and due to my getting mad over the money spent for nothing. He said he would knock of the $200 spent the first time on the bolts. So the new quote was $700 and I supply the flexplate to save me money. I thought this was high so I called another shop. They said it was a six hour job and gave me a discount of $500 and I supply the flexplate. I told the old shop about this quote and they finally agreed to do it for $500. I should of ran with my motorhome at that point. My wife was right. He told me he would have to charge me $100 for his time if I went to another shop. So out of convenience I let him do the work
Now the transmission is out of the motorhome and he can not find a flexplate that fits properly. Airstream said put in a standard GM turbo 350 flexplate it does not have weights. The mechanic says the holes are in the wrong place and will need to be drilled like the one that is cracked in the motorhome. Upon removing the transmission he discovered that the torque converter has some grooves and some bearing (I can remember which) will need to be replaced or it will leak at the front of the transmission where it is coupled to the engine. He wants and additional $500 to do that work which includes the parts. I am so mad. Originally I told the guy times are tough for me right now and I just want to get my motorhome repaired so I could sell it. He keeps telling me he will work with me. I think he is working me. On Monday I will go to the shop and see the torque converter and parts. Help!
Thank you,
Mike
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Old 08-23-2009, 10:55 AM   #19
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Quote:
Originally Posted by Mike Leary View Post
What does "no longer at Inland RV" mean, is that some kind of in-joke? I don't get it.
Quote:
Originally Posted by RBolton View Post
Did I miss something?
Quote:
Originally Posted by Mike Leary View Post
I must have; seemed like Terry had found a home.
I no longer work there. It didn't work out.
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Old 08-23-2009, 10:58 AM   #20
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Airstream said put in a standard GM turbo 350 flexplate it does not have weights. The mechanic says the holes are in the wrong place and will need to be drilled like the one that is cracked in the motorhome.
It's been a while since I've had one out, but I think the Turbo 400 has a slightly different flywheel/flexplate. You may find one that is pre-drilled with both sets of holes, I'm assuming the holes that are in the wrong place are for the torque converter, not the crankshaft.

Here's a link to a non-weighted turbo 400 flexplate, it says it's about $20:
http://www.rockauto.com/catalog/rafr...c1297177k65712
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Old 08-23-2009, 12:00 PM   #21
Full Timers/Diesel power.
 
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Good luck, we've all been there. Let us know what happens.
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Old 08-24-2009, 12:08 PM   #22
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The transmission is out

The transmission is out of the motorhome so it will not move. There was no leak to speak of before he started his work. I am going to the shop to see what the parts look like. I am in agreement with most of the people who have been replying to this post. Perhaps I should let him do the work of replacing the flexplate and if and when it leaks I start fresh with another shop. I am sure I could find another shop who could match his price even if they have to remove the transmission again.
Thank you,
Mike
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Old 08-24-2009, 06:34 PM   #23
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Mike,

After reading post #18, I'm not sure your mechanic has done anything really wrong or out of the ordinary. If the converter was found to be loose, one would assume that to be the source of the noise. A cracked flex plate can not be 100% diagnosed without a visual and often time this is only possible with the transmission out. His offer to discount the labor by the original repair amount to replace the flex plate was honorable.

The call to replace the converter and bearing/bushing is ultimately yours to make. It is the responsibility of the mechanic to make you aware of their condition now - while they are visable and accessible. He would have had no way of knowing the condition of these parts until after removing the transmission.

It sounds to me like he is doing things in more or less the proper order. Taking the transmission in and out is a big job in almost any vehicle and the cost of labor gets frustrating especially when the first repair attempt does not correct the problem.

If you can get a correct ID on the transmission and engine and chassis build date, I'd think a GM dealer could help find the proper parts.

Good luck, Roger
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Old 08-24-2009, 08:28 PM   #24
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Went to the shop today

I went to the shop to inspect the parts. The torque converter was lightly scored and it is my belief that it could be polished with some emery cloth and reinstalled with a new pump bearing and seal. He quoted me $100 including the parts to rebuilt the pump and bearing. I told him to do the work. It will be $600 out the door this trip. I did not really want to spend the money on a torque converter. I hope it does not leak. I went to the auto parts store and found a flexplate. He was concerned with the teeth on the flexplate. I had to show him it had a ring gear internally in the motor. Wow .. he did not notice that. So the old flexplate was completely cracked all around the holes that attaches it to the engine. I am gaining confidence that I will be up and running soon. Hope I made the correct call on the torque converter.... it did not look that bad.
thank you,
Mike
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Old 08-31-2009, 06:10 PM   #25
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When we had an '82 280 it had flexplate problems - A/S fix was to install a casting that ;looked like a cage around the bottom of the flexplate/t/q junction ... that broke after only a few miles and put a crack in the flexplate. Then we had a local shop remove the flexplate and weld up the crack. They had a bit of a time getting the balance right, but it ended up OK and cost a LOT less than the poor guy is being told.
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Old 08-31-2009, 09:35 PM   #26
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This might be of interest to you

In the future, if you ever need parts, I have this parts list from when I had my 1972 Suburban, which had a TH400. There are a few differences, but the TH475 and TH400 are pretty much the same...the TH475 is stouter, using straight-cut planetary gears vs heli-cut in the TH400. If you google it, there's a good website that will tell you what the differences are. The flexplate used should be a TH400, not TH350, as Airstream suggests. Also, of note, the TH475 is also known as the 3L80HD (1987 model year and newer, the 3L80 was the new name for the TH400 in '86), so you might be able to find out more, using that model name.
Attached Files
File Type: pdf TH375_TH400_TH475_3L80_3L80HD Parts List.pdf (170.3 KB, 66 views)
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Old 09-01-2009, 03:04 AM   #27
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The weights on the flex plate are for the externaly ballanced 454...putting on one without weights may cause problems.
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Old 09-01-2009, 11:38 PM   #28
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Flexplate found without weights

I finally found the proper flexplate. I have no idea of what the mechanics problem was. He even threatened to start charging me storage because he could not find a flexplate. He was concerned with the teeth on the flexplate. He did not notice the started working of an internal ring gear. The motorhome now runs great. Yeah!!!!

Thank you for all your input.

michael
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