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Author Topic: turbo 350 trans  (Read 4284 times)

Offline jefferias

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turbo 350 trans
« on: July 05, 2009, 04:12:17 pm »
hi guys.  my truck has been leaking tranny fluid for about 2 years now, replaced pan gasket and dipstick tube and still leaks.   so took off the inspection cover and decided it was the front pump seal. i pulled the trans and to my amazement i couldnt believe what the torque converter shaft( part that goes into the bushing) and  bushing for front oil pump(looks like bearing race.) looked like. showing lots of wear which baffles me,cause i only have like      25 000kms on this rebuilt tranny. im guessing the shaft and bushing should be a nice,smooth surface right? which leads me to beileve i got ripped off with a used tq conv. or even tranny itself. so now i need a front pump bushing, tq converter, and pump to case o-ring. 

I guess my main concerns are 1) is this a hard job to get that bushing out? any special tricks?
                                         2) do i want a 2000 or 2400 stall converter- truck is 84 sierra c-15, 350ci, stock cam, swirlport heads with mild work, intake, headers, among various other small do-dads.rear-end =3.08  and weighs about 4100lbs with me in it.

sorry for the long post but any input will be muchly appreciated-thanks   jeff
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Offline VileZambonie

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Re: turbo 350 trans
« Reply #1 on: July 05, 2009, 04:24:15 pm »
post pix. To replace the bushing you need to remove the pump. The pump should have a few updates done also. Let's see pix
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Offline jefferias

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Re: turbo 350 trans
« Reply #2 on: July 05, 2009, 04:59:43 pm »
sorry all i got is crappy camera phone.  cant get a good pic of bushing -but there are glaze/score marks on side and top of it. looked at torque convertor shaft and saw some pitting (black marks on pic) along with some glazing thats not equal all the way around the shaft.   the bushing pic-white mark is the "damage" bad pic though best i can do.  thanks vile!!
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Offline jefferias

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Re: turbo 350 trans
« Reply #3 on: July 05, 2009, 07:32:43 pm »
also, i noticed when i was moving my torque convertor all the internals were jiggling around inside. dont know if thats normal but im thinking not and this is why my bushing would be bad to finally end up making the seal leak. 
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Offline VileZambonie

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Re: turbo 350 trans
« Reply #4 on: July 05, 2009, 07:44:50 pm »
What internals were jiggling? Be specific! You can sand the neck of the converter as long as it cleans up you'll be ok with that
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline jefferias

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Re: turbo 350 trans
« Reply #5 on: July 05, 2009, 07:56:04 pm »
i believe its the turbine assembly/ maybe sloppy bearing.  i dont think i can clean up the pitting on the shaft its like .025 deep.  i was expecting this to be a 6 dollar seal fix  haha  i shoulda known better!!! >:(
« Last Edit: July 05, 2009, 08:04:54 pm by jefferias »
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