throttle position sensor for c6 ?'s

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Feb 19, 2013 | 06:44 PM

79sparky

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throttle position sensor for c6 ?'s

I can take my engine till it hits the rev-limiter and then have to take my foot off the accelerator for it to shift. If I'm easy on the gass peddle it shifts through every gear fine. If I give it hell it will hit the rev-limiter at 35 then I let off and it shifts to 3rd. Them if I'm going around thirty its hard to get it to downshift back to 2nd ftom third with out it jumping down to 1st. The tps looksto be adjustable and the PO said the original owner messed with it. So my questions are, is this even haveanything to do sith the tps at all? Can I adjust it to fix it or does it need replaced? Also its a rebuilt jasper with rought 50k on it, thanks in advance for the help, this is my first automatic so I've never messed with them at all.

Feb 19, 2013 | 07:03 PM

tjc transport

i ain't rite

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From: Marlboro Mental Hospital.

no TPS on a C-6.
the C-6 is vacuum controlled, and uses a vacuum regulator valve to control the vacuum signal to the trans modulator.
you need a minimum of 17 inches vacuum for the C-6 to shift properly. it sounds to me like you either have a weak vacuum pump, or improperly adjusted VRV.

this link will take you to the directions for properly setting the VRV:
https://www.ford-trucks.com/forums/s...6&postcount=12
and if you want to give this thread a read:
https://www.ford-trucks.com/forums/1...-shifting.html

Feb 19, 2013 | 07:12 PM

79sparky

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Thanks for the help bud its really freakin annoying since reving the engine that high is harder on it than I like to be and worthless for gaining speed to get on a highway see what happens when I get a chance to tinker with it. Thanks again!

Feb 19, 2013 | 07:23 PM

tjc transport

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From: Marlboro Mental Hospital.

that exact problem is what brought me here 8 years ago after i swapped the C-6 into my 88 after the ZF-5 speed self destructed at 350,000 miles.

Feb 19, 2013 | 07:25 PM

79sparky

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Sounds like you got your money's wirth out of that tranny though

Feb 19, 2013 | 07:50 PM

tjc transport

i ain't rite

Joined: Mar 2005

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From: Marlboro Mental Hospital.

well, i only have 150,000 miles on the C-6, but the guy that built it for me guaranteed me i could not blow it up.
i have been trying, but so far he was rite.

Feb 20, 2013 | 12:57 AM

joshofalltrades

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i drove mine for a couple years with a defective VRV (what you called a TPS), and became quite proficient at manually shifting it. when the shifter is in 2nd, the tranny will only be able to go into 2nd gear, so we would take off in drive, pull the shifter to 2nd when i wanted it to shift, then return the shifter to drive when i wanted it to shift into 3rd. the only problem was i couldn't keep it in 3rd below 42mph, so i hated roads with a 35 speed limit.
i finally got a different VRV on there last week, and its amazing how it shifts by itself