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Texasz71 · 09-29-2018, 02:38 PM

First post. Long time lurker, first time poster.

So I recently bought my first square body.

1975 k10. 400/350/203

Previous owner said it needed some TLC, and I was ready for a mediocre project.

So right off the bat, the th350 wouldnt shift from 1-2. It had 1 and reverse. So after googling, I replaced the vacuum modulator. It has vacuum at idle. Still no shifty. Next I pulled the governor. Turns out, the plastic gear had broken off. Got it out (nightmare), then put a new plastic gear on. The piston was moving freely. Still no shifty. So I noticed the trans pan was dented and had a slow leak. So I just got finished swapping the pan (one with a drain plug), and added fluid. Fluid level is perfect. Still doesnt shift.

After hours and hours of googlin, I come to yall for other suggestions.

Thanks in advance

09-29-2018, 02:38 PM	#1
Texasz71 Registered User Join Date: Sep 2018 Location: San Antonio Posts: 14	Th350 question First post. Long time lurker, first time poster. So I recently bought my first square body. 1975 k10. 400/350/203 Previous owner said it needed some TLC, and I was ready for a mediocre project. So right off the bat, the th350 wouldnt shift from 1-2. It had 1 and reverse. So after googling, I replaced the vacuum modulator. It has vacuum at idle. Still no shifty. Next I pulled the governor. Turns out, the plastic gear had broken off. Got it out (nightmare), then put a new plastic gear on. The piston was moving freely. Still no shifty. So I noticed the trans pan was dented and had a slow leak. So I just got finished swapping the pan (one with a drain plug), and added fluid. Fluid level is perfect. Still doesnt shift. After hours and hours of googlin, I come to yall for other suggestions. Thanks in advance Last edited by Texasz71; 09-29-2018 at 02:57 PM.