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Old 01-09-2007, 10:44 AM   #1
dacanuck
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Downshift cable adjust

What's the proper way to adjust my downshift cable on my 86 with a TH350? Since I've put my Holley on it won't downshift at full throttle.
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86 GMC C15 swb. 350/TH350, fully loaded, but wish I had overdrive!
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Old 01-10-2007, 12:27 AM   #2
lurch115
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Re: Downshift cable adjust

won't down shift?? or up shift???? if it doesn't down shift you need to push the the button down and open the throttle all the way (with the engine shut off) and if you do that and there is still slack in the cable...you need to push the button and push the cable back in by hand and repeat the process again
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Old 01-10-2007, 10:28 PM   #3
dacanuck
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Re: Downshift cable adjust

There's no button...just a screw on stop in front of the throttle lever on the carb. It's a TH350, so it's not a TV cable like on TH400's or TH700's. This cable only controls downshifts.
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Old 01-23-2007, 01:33 PM   #4
dacanuck
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Re: Downshift cable adjust

Can someone post or email me a pic of a factory cable for a TH350 trans? I'm starting to think the transmission shop put on a universal aftermarket one instead of a OE unit.
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