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Old 11-02-2012, 11:50 AM
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T-350 pump removal

Got a TH350 pump leak, is it hard to remove the pump? I've got a slide hammer but would have to fab a way to use it on the pump. Any issues with replacing pump seals?

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Old 11-02-2012, 01:10 PM
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I believe the TH350 pump is like the TH400, where two of the pump-to-case bolt holes are tapped for the slide hammer. I believe they are the two at 3:00 and 9:00. The Kent Moore tools for this are a pair of small slide hammers so you can pull both sides at once, but I've had no problems pulling the pump on a TH400 by using a single slide hammer and going back and forth between the two holes. I fabricated an adapter for my slide hammer by welding two bolts head-to-head. One end screws into the slide hammer and the other threads into the pump holes.
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Old 11-02-2012, 06:23 PM
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you can also pry up with screwdrivers inside the case if the oil pan is off.If you simply screw 3/8 bolts thru the pump enough it will push the pump up alittle.If you replace the seal you should replace the bushing too.the converter snout should look good and not scoured.When you split the pump halves you must realign the halves on assembly.18Ft lbs on torques if i remember
Lube the bushing and pre fit it on the converter lube the seal make sure the slots on the converter line up and seat all the way in the pump
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Old 11-02-2012, 06:24 PM
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if you just replace the seal dont pull the pump
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Old 11-03-2012, 12:33 AM
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From what I can see with it in the truck the leak is coming from the pump cover.

Why would I need to split the pump?

To fix a a cover leak don't I just need to replace the gasket and O-ring? I'll also install a new converter seal.
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Old 11-03-2012, 12:45 AM
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Can I pull the pump with the trans sitting horizontal or do I need to have it vertical.
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Old 11-03-2012, 09:18 AM
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if your going to buy a new seal and converter then you for sure want to put a new pump/converter bushing in also thats why u would split the pump halves apart
if your going thru all the work do it right and get all the seals and gaskets for the pump

Last edited by Ruthlessmr; 11-03-2012 at 09:29 AM.
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Old 11-03-2012, 09:25 AM
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u can just drop the rear part of the trans into a 5 gallon bucket and it should stay upright for ya
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