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07-10-2014, 04:45 PM
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#1 |
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Registered User
Join Date: Nov 2013
Location: Keller, TX (DFW)
Posts: 45
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What's wrong with my TH350 tranny?
Trying to troubleshoot my son's TH350 AT in his '71 C10.
Yesterday it began sticking in gear (2nd gear I believe). After moving column shift to D, it's not shifting up or down and making a soft whirring or whining noise on acceleration. I replaced and checked the vacuum line and verified the vacuum accumulator is getting and holding a vacuum. Also checked AT fluid level and its cherry red and full. Kickdown cable is not stuck or binding. I visually inspected the shift linkage and it appears to move through the motions correctly and Park, reverse, & neutral all are working fine. My next guess is looking at the governor but that's above my comfort & knowledge level. Any tips? Anything else I can check prior to hauling it down to the tranny shop? Thanks in advance!
__________________
"Life is too short to use cheap zip ties" 64 C10 SWB 71 C10 LWB 72 C10 LWB |
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07-10-2014, 05:13 PM
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#2 |
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Registered User
Join Date: Dec 2011
Location: winnipeg
Posts: 1,107
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Re: What's wrong with my TH350 tranny?
I'd check to make sure the filter isn't clogged in the pan for starters.
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07-10-2014, 05:43 PM
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#3 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,573
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Re: What's wrong with my TH350 tranny?
Pull the dipstick and smell the fluid. If it smells like burnt toast then it's rebuild time.
Fluid should be pink not cherry red. |
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07-10-2014, 06:55 PM
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#4 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: What's wrong with my TH350 tranny?
"soft whirring noise" sounds like a sun shell problem
__________________
My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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