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Buick 3.8 Transaxle shift help!!!
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<blockquote data-quote="LightBnDr" data-source="post: 731445" data-attributes="member: 9031"><p>I used to work on them all the time. It should be a 4t65. Though they were somewhat my bread and butter, they really didn't have major issues. </p><p></p><p>I put pressure control solenoids in them all the time for shuddering on accel from a stop. </p><p></p><p>As well as stripped 4th gear shaft splines. Other than those they would have TCC codes and I was putting valve bodies in them. </p><p></p><p>Almost guarantee you don't have a 4t60 in it but if for some reason you have a unicorn, it has a vacuum modulator that controls line pressure. Those would corrode and get sticky, causing the same shudders and shift issues. </p><p></p><p>Basically that being said, if you have a 1-2 shift but nothing else, for sure stick to the basics. 2-3 shift solenoids would crap sometimes but it had to have a million miles on it. </p><p></p><p></p><p>You have a DLC connector to pull codes ? You should. I reprogrammed these PCMs all the time. </p><p></p><p>Plus you can watch data display and it will show you output speed RPM so you can tell right away whether it's an input issue or not.</p></blockquote><p></p>
[QUOTE="LightBnDr, post: 731445, member: 9031"] I used to work on them all the time. It should be a 4t65. Though they were somewhat my bread and butter, they really didn't have major issues. I put pressure control solenoids in them all the time for shuddering on accel from a stop. As well as stripped 4th gear shaft splines. Other than those they would have TCC codes and I was putting valve bodies in them. Almost guarantee you don't have a 4t60 in it but if for some reason you have a unicorn, it has a vacuum modulator that controls line pressure. Those would corrode and get sticky, causing the same shudders and shift issues. Basically that being said, if you have a 1-2 shift but nothing else, for sure stick to the basics. 2-3 shift solenoids would crap sometimes but it had to have a million miles on it. You have a DLC connector to pull codes ? You should. I reprogrammed these PCMs all the time. Plus you can watch data display and it will show you output speed RPM so you can tell right away whether it's an input issue or not. [/QUOTE]
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Buick 3.8 Transaxle shift help!!!
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