Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Jerk Under Hard Acceleration

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Old Nov 2, 2009 | 11:22 AM
  #1  
novafirebirdguy's Avatar
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Joined: Mar 2009
Posts: 503
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From: Des Moines, IA
Car: 90 Formula WS6, 86 Sport Coupe
Engine: 305 TBI, 2.8 MPFI
Transmission: 700r4, 700r4w/vette servos
Axle/Gears: 2.73 Open, 3.42 Open
Jerk Under Hard Acceleration

Ok, so I've noticed lately in my maro that when i'm at WOT (like at an on ramp) When my tranny shifts one side of the car seams to jerk a bit forward. Hard to describe but it seems like on side is getting more traction then the other. Today, coming home from school I was WOT on the on ramp and on my 1-2 shift I actually left a tire mark on my right side, by sound (no tach yet) I think I was at about 4-4.5k rpm's when the tranny shifted. Anyway, is this pulling just because I don't have a posi or is my suspension really worn? I know this is kindof a stupid question but I'm paranoid. My suspenion looke fairly new (kyb stuff) and everything is tight, but I just worry.
Thanks
Alex
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Old Nov 2, 2009 | 05:17 PM
  #2  
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Re: Jerk Under Hard Acceleration

sounds like your trans has a shift kit that's doing what you should want it to do. The reason it spins the right rear is because the rotation of the pinion gear against the ring gear tends to slightly lift the right tire. Enjoy!!!
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Old Nov 2, 2009 | 08:10 PM
  #3  
novafirebirdguy's Avatar
Thread Starter
Senior Member
 
Joined: Mar 2009
Posts: 503
Likes: 1
From: Des Moines, IA
Car: 90 Formula WS6, 86 Sport Coupe
Engine: 305 TBI, 2.8 MPFI
Transmission: 700r4, 700r4w/vette servos
Axle/Gears: 2.73 Open, 3.42 Open
Re: Jerk Under Hard Acceleration

woo hoo! now i remember when i had it rebuilt they put a shift kit in. Thanks ~ Alex
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