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Old 01-16-2009, 02:38 PM
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TH350 - no forward gears, only reverse....


I have changed the filter & fluid, and am wondering if the bands need to be adjusted?

Are there any other causes for this problem?

Can I adjust the bands myself?

Thanks.
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Old 01-16-2009, 04:58 PM
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this transmission only has 1 band and thats for manual 2nd and is not adjustable. odds are that the clutches in the forward drum are toast... sounds like rebuild time.
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Old 01-17-2009, 06:26 AM
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I had the same problem a few years ago with a 350 turbo. What "surprise " when expecting to go forward, huh? I took the pan off and removed the valve body. Took it apart and cleaned all of the check valves. Put it back together and no more problems. ......CR
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Old 01-17-2009, 04:19 PM
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couple of questions here, what was the deciding factor and what happened to get you to do a trans service in the first place??? how much trash was in the bottom of the pan? what were you doing when you lost forward movement?
i gave a short non info answer to a short non info question... details bud, we need details if you really want help figuring this out and getting the info needed to get it back on the road...

Last edited by tnsmith10; 01-17-2009 at 04:30 PM.
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Old 01-20-2009, 03:25 PM
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the truck sets for about 7 months out of the year i primarily use it to plow snow the trans has about 1500 miles on it sense replaced i plowed with it 4 times this year then lost all forward gears dropped trans pan pretty clean replaced filter and fluid still no forward only reverse thanks
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Old 01-20-2009, 04:40 PM
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check this thread out and look at some other things i listed in there... here the link:TH350 Reverse Drive Only ***?
maybe this will help with some ideas, this guy has the same basic problem.
on a side note, if you have 1, hook a pressure guage up and see if your loosing pressure...
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Old 01-20-2009, 07:53 PM
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I am a middle aged fart.....so here is how I look at this;

the transmission backs up good per the OE post.

this tells me the pump is working.

the input shaft is spinning since that shaft transmits power to the trans and the direct clutch in reverse, which also means the torque converter is working well enough to move the vehicle

which brings me to the direct clutch.. it is working if the trans backs up. ALSO the low - reverse clutch is working since the trans backs up.

So, if this trans does not moved forward in ANY gear of 1-2-D , that tells me the problem is the forward clutch.

IF the trans would move forward in "1" on the shifter... then the low roller clutch is the problem.

that is how I view this problem so far...unless the linkage inside the trans case is unhooked?

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Last edited by Crosley; 01-20-2009 at 08:03 PM.
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Old 01-21-2009, 05:44 AM
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you da man crosley
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