C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Trouble Shifting....

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Old Aug 4, 2005 | 06:11 PM
  #1  
tarheel27's Avatar
tarheel27
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Default Trouble Shifting....

'85 automatic. I'm having trouble upshifting gears, most noticeably from first to second, it doesn't go through with the shift at normal pressure of the gas pedal. I either have to let off the gas and give it a second and it will shift or jam down on the gas and "force" it to shift. Any ideas?
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Old Aug 4, 2005 | 06:13 PM
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From: ZR1 Gathering '04, '05 Northlake Texas
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Have you checked you trans fluid to if its low?
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Old Aug 5, 2005 | 03:46 AM
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From: sd
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Have you adjusted the TV cable. Get a helms manual and they have the procedure listed in there as to what to do.
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Old Aug 5, 2005 | 04:21 AM
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From: SE NY
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Since it sounds like the WOT shift is ok, assuming fluid level is up to the mark, run through the factory TV cable "adjustment" procedure. This essentially amounts to:
-depress the tang on the TV cable mounting bracket
-move the cable head back toward the mounting bracket
-depress the accelerator fully to the floor once (engine off)
-manually rotate the throttle to WOT to verify the TV cable head has been pulled to the proper position.

If this doesn't solve the part throttle shifting have a shop measure line pressures.
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Old Aug 5, 2005 | 09:23 AM
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
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Sounds like the vacuum line to the trans is jacked.

Larry
code5coupe
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Old Aug 8, 2005 | 10:52 AM
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Thanks guys. I've got a fixer up here and there's a lot of work to be done on it. I have plenty of more questions...you think the best way to do it is to ask 'em one by one in the forum?

Last edited by tarheel27; Aug 10, 2005 at 01:21 PM.
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Old Aug 8, 2005 | 02:45 PM
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Originally Posted by tarheel27
Thanks guys. I've got a fixer up here and there's a lot of work to be done on it. I have a Haynes manual, but i have to admit that i'm not the most experienced guy for the job. I have plenty of more questions...you think the best way to do it is to ask 'em one by one in the forum?
Yes
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