Th 350 gurus.. need assistance

M&M Offroad

M&M Offroad

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Joined
Mar 16, 2006
Location
mocksville
Ok.. after a 4 wheel hole shot from first to second gear under hard power.. I have nothing but park... No real noise to speak of.. shifting mechanism is working properly and it is def. in the tranny.. But no odd noise when in gear.. just no go... I suspect it is a input shaft or pump failure.. but i am not a auto tranny specialist and wanted some ideas of what else it could be before i call jackson transmission monday with questions.. This tranny has 8 trips on it and never slipped or has gotten hot.. everything was working well until the whole shot.... Any advice is appreciated.
 
Guru by no means but Ive rebuilt a few my .02 fwiw
If it wont move at all...even when manually shifted to low, Im guessing hard parts...which ones input, main cluster, output is anyones guess and pure speecualtion

No noise is odd...perhaps it made a noise but the badass engine revs masked it?
 
im gonna say converter lugs broken in pump or tail shaft broke just in front of the low gear drum. first remove the cooler lines and see it it pumps if not its the pump lugs common problem if the converter isnt fully engaged into the pump and most people over look this when they bolt it up and slide the converter up to the flexplate. and if it does pump then pull it and send it to the tranny shop cause u just broke a shaft.
 
Ok i have great pressure and volume from the pump(via lines)... I have good movement in the mechanical shifting assembly inside and outside of the tranny... Started removing everything to pull tranny... if anyone esle has input please let me hear it before i tear it out the tommorrow.. thanks PJ
 
confused.... tranny out... main shaft in tact.. In fact i can turn input shaft and feel it wanting to turn the output shaft a little... No noise.. seems to be fine... torque converter????? Ideas????
 
Does it have a warranty? If not, start taking it apart yourself. Th350's are very simple and you've already done the hardest part--pulling it. Did the pan have anything in it?
 
The th350 in my brothers camaro did the same thing after he jumped down on it and pulled it into second. It quit pulling and made no noise. The transmission shop said there was nothing wrong with the transmission after it was disassembled. Turns out the TCI converter broke internally.

The pump is turned separately from the input (the two notches on the converter body turn the pump, the input shaft splines onto a part inside the converter) so its possible to have pressure and cooler line flow but no input shaft movement.
 
answer...

it ended up being that i stripped the internal splines on the torque converter... replaced with a torque converter that had 1/4" more spline engagement. hope this helps someone in the future..Back together and ready to race.....
 
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