Auto Trany Down Shift - NoPistons -Mazda Rx7 & Rx8 Rotary Forum

2nd Generation Specific 1986-1992 Discussion

Auto Trany Down Shift

Old 03-24-2003, 11:21 AM
  #1  
Member
Thread Starter
 
Join Date: Jan 2003
Posts: 42
Default

Got to put the pedal all the way to the floor to get the down shift. I checked the vac sensor and it changes voltage when a vac is applied. I don't if it is calabrated though. Any Ideas???
critter is offline  
Old 03-24-2003, 11:38 AM
  #2  
Senior Member
 
Join Date: Dec 2002
Location: QUEENS NYC
Posts: 1,687
Default

i have an auto tranny im going to convert to 5spd in mid april. Are you interested in buying an auto tranny just in case ures blow up

?
ROTARYROCKET7 is offline  
Old 03-24-2003, 12:07 PM
  #3  
Senior Member
 
Join Date: May 2002
Location: California
Posts: 22,466
Default

that might be set correctly. most automatics make you floor it to downshift



mike
j9fd3s is offline  
Old 03-24-2003, 06:43 PM
  #4  
Senior Member
 
Join Date: Dec 2002
Location: QUEENS NYC
Posts: 1,687
Default

yeah check out the automatic lol.. ughhh
ROTARYROCKET7 is offline  
Old 03-24-2003, 09:28 PM
  #5  
Senior Member
 
Join Date: Jan 2003
Location: Gardena CA
Posts: 199
Default

damn..... my AT Will not shift from 2nd to 3rd when warmed up and it downshifts at way to high speed and rpm's the motor to 7500 + how/ where is the vac sensor to test it... any threads on testing procedure? Not trying to highjack your thread but maybe our problem is related.
needa86NAat is offline  
Old 03-25-2003, 07:24 AM
  #6  
Member
Thread Starter
 
Join Date: Jan 2003
Posts: 42
Default

There is a little black box (1" by 1") mounted on the passenger side of the car near the airfilter. It has a vac and wire connector. My haynes manual says it is for the Auto trany. Need a vac guage to test it correctly but I just hooked up a vac hose and a volt meter and suched on the hose and watched the voltage change. I'll double check all this with the manual that is in the car.
critter is offline  
Old 03-25-2003, 08:02 PM
  #7  
Senior Member
 
Join Date: Jan 2003
Location: Gardena CA
Posts: 199
Default

ok thanks for the info.... If I where able to bypass this box would I be able to control upshifts/downshifts?
needa86NAat is offline  
Old 03-25-2003, 09:55 PM
  #8  
Senior Member
 
Join Date: Dec 2002
Location: Tulsa, Oklahoma
Posts: 224
Default

Check the modulator valve on the side of the tranny, if it is bad or not adjusted, your car will shift too hard or not at all. There is a screw valve inside adjusted by a screwdriver. If you take the vacuum line off and aft comes out, change it. Also check to make sure the vacuum line running back to the engine bay is not cracked or pinched. This is what caused my problems. Good luck.
88Turbo is offline  
Old 03-25-2003, 11:19 PM
  #9  
Senior Member
 
Join Date: Jan 2003
Location: Gardena CA
Posts: 199
Default

any info on how to adjust it.. all I have for specs is a paperwieght hayes manual. Thanks for the help!!!!
needa86NAat is offline  
Old 03-25-2003, 11:52 PM
  #10  
Senior Member
 
Join Date: Nov 2001
Location: LA, USA
Posts: 1,622
Default

I can't remember, is this tranny also control by cable at the throttle or by the computer?



Some car have a wire form teh throttle body to the valve train in the tranny that controls the shifting, adjusting this wire can change the way the tranny shifts. I'm not sure the rx7 tranny has this?



C
turborotor is offline  

Thread Tools
Search this Thread
Quick Reply: Auto Trany Down Shift


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.