79 SLAMS INTO REVERSE (AUTOMATIC)

[JohnnyJ]

I have a 79 Corvette with a 350 tranny that has recently started to slam into reverse gear. Is there an easy fix for this, or am I looking at a new or rebuilt tranny in the future?? Any suggestions are appreciated.

Cheers

 

[Evolution1980]

Have you checked line pressures?

 

[bradfordsvettes]

make sure the vacumline to the modulator is not cracked or broken that will cause a problem Steve

 

[AKRAY4PLAY]

when's the last time you changed your tranny filter?? also is your idle rpm under 1000?? checking the vac lines to the modulator is always a good idea as stated.

 

[emf1367]

Is it possible the tranny is fine but the u-joint(s) or rear end is shot? I had a similar problem a few years ago and it turned out to be a bad u-joint on the half shaft (actually two bad u joints). They never made a noise or acted poorly when in any of the forward gears but every time I put it in reverse there was a loud bang and a delay in movement.

Good luck

 

[KANE]

A loose or broken tranny mount will cause the tranny to "buck". I'd check that first.