Im lost and need help
Thread Starter
Teching In
Joined: May 2013
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From: alva OK
Im lost and need help So just got my car dynoed and found a problem. The trans vibrates really bad and my speedometer freaks out at about 80 under a load. What's the problem, I wanna learn about trans.
Joined: Nov 2003
Posts: 6,216
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From: Wichita KS / Rancho San Diego
Please knock it off with posting a new thread every two minutes. Have some patience and maybe somebody will respond. PITA for me to have to delete your eight other threads now.
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Joined: Aug 2010
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From: Ann Arbor, MI
It sounds like your trans output shaft is very loose due to a very worn bushing and/or internal wear. This is causing your driveshaft to wobble creating the vibration and the speed sensor on the output shaft to misread.
If true, it will require a complete trans rebuild. If true, your car should be driven no further than a repair shop as strong driveshaft vibration can snap a u-joint causing severe damage to the car.
The full diagnosis will require removing the driveshaft and then the tailshaft to evaluate just how loose the output shaft is.
As RevGTO stated, stay on this thread for the entire issue. For one thing, people are more likely to contribute to an existing thread instead of a brand new one.
If true, it will require a complete trans rebuild. If true, your car should be driven no further than a repair shop as strong driveshaft vibration can snap a u-joint causing severe damage to the car.
The full diagnosis will require removing the driveshaft and then the tailshaft to evaluate just how loose the output shaft is.
As RevGTO stated, stay on this thread for the entire issue. For one thing, people are more likely to contribute to an existing thread instead of a brand new one.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
As 01ssreda4 suggested, most vibration problems are due to the driveshaft/drivetrain and not the trans. I only mentioned the output shaft because your speedometer is erratic, but a combination of wobbly driveshaft and bad VSS connections is another possibility.
Slipping is a different problem. What gear was slipping?
As you probably know these transmissions have a notorious problem with the 3/4 clutch slipping. This is usually noticed in 3rd gear. If only 4th gear is slipping and you race in 4th gear, you should consider a 4th gear billet servo piston.
