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SHIFTrl240
- Posts: 544
- Joined: Mon Jul 07, 2003 4:28 pm
- Car: 1990 SR20 Sil-80
2009 Yamaha RoadStar Warrior
2017 Alfa Romeo Giulia Ti AWD - Contact:
Re: 240sx suspension (zombie2k)
Long story short: check the sensor at the rear of the transmition,and try another shop who specializes in transmition work. it could be something as simple as the speed sensor for the output of the transmition....
more info:Im not sure how Nissan autos work but trannys that dont use electronics for everything have something called a govener, wich produces hydrualic pressure that is ruffly equivalant to the speed of the vehichle. The transmition balances this pressure against the hydrolic pressure of another device called a throttle valve(T.V.). T.V. makes pressure equivalant to the load on the engine(or throttle position). These two pressures operateon opposite sides of a valve in the transmition, and when the pressure from the govener(vehichle speed) overcomes T.V. pressure(throttle position) the vehicle shifts. Basicly this is so if your are on the trottle hard, it takes more speed for an upshift, or will downshift if speed is low enough. But if the govener isnt working right it wont know how fast the vehichle is going so it wont shift untill it very late, like yours. It looks like the 240's auto uses more electronics then the one I work on(Just finished with a class on auto trannys) and I could find a govener when I looked thru the FSM so im pretty sure its just that sensor in its place.
It could also be other things as well so you could need a new one, but alot of shops dont see alot of auto transmission work, so when they do they have little experiance/specialized tools/VERY CLEAN facilitys and are quick to recomend a replacement.
more info:Im not sure how Nissan autos work but trannys that dont use electronics for everything have something called a govener, wich produces hydrualic pressure that is ruffly equivalant to the speed of the vehichle. The transmition balances this pressure against the hydrolic pressure of another device called a throttle valve(T.V.). T.V. makes pressure equivalant to the load on the engine(or throttle position). These two pressures operateon opposite sides of a valve in the transmition, and when the pressure from the govener(vehichle speed) overcomes T.V. pressure(throttle position) the vehicle shifts. Basicly this is so if your are on the trottle hard, it takes more speed for an upshift, or will downshift if speed is low enough. But if the govener isnt working right it wont know how fast the vehichle is going so it wont shift untill it very late, like yours. It looks like the 240's auto uses more electronics then the one I work on(Just finished with a class on auto trannys) and I could find a govener when I looked thru the FSM so im pretty sure its just that sensor in its place.
It could also be other things as well so you could need a new one, but alot of shops dont see alot of auto transmission work, so when they do they have little experiance/specialized tools/VERY CLEAN facilitys and are quick to recomend a replacement.
Re: 240sx suspension (Red coupe)
The reason shops recommend replacement trans rather then rebuild them isnt because they lack the knowledge or dont have the tools, most of the time its because the cost of parts and labor to overhaul the trans tends to outweigh the cost of just buying a remanufactured one and the labor to R&R it is far less.Red coupe wrote:Long story short: check the sensor at the rear of the transmition,and try another shop who specializes in transmition work. it could be something as simple as the speed sensor for the output of the transmition....
more info:Im not sure how Nissan autos work but trannys that dont use electronics for everything have something called a govener, wich produces hydrualic pressure that is ruffly equivalant to the speed of the vehichle. The transmition balances this pressure against the hydrolic pressure of another device called a throttle valve(T.V.). T.V. makes pressure equivalant to the load on the engine(or throttle position). These two pressures operateon opposite sides of a valve in the transmition, and when the pressure from the govener(vehichle speed) overcomes T.V. pressure(throttle position) the vehicle shifts. Basicly this is so if your are on the trottle hard, it takes more speed for an upshift, or will downshift if speed is low enough. But if the govener isnt working right it wont know how fast the vehichle is going so it wont shift untill it very late, like yours. It looks like the 240's auto uses more electronics then the one I work on(Just finished with a class on auto trannys) and I could find a govener when I looked thru the FSM so im pretty sure its just that sensor in its place.
It could also be other things as well so you could need a new one, but alot of shops dont see alot of auto transmission work, so when they do they have little experiance/specialized tools/VERY CLEAN facilitys and are quick to recomend a replacement.
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s13sr20chris
- Posts: 4148
- Joined: Tue Jun 10, 2003 9:32 am
- Car: '89 Nissan S13 w/redtop running 13psi and not leaking fuel anymore
- Contact:
Re: 240sx suspension (NISTECH)
no second or fourth? off the top of my head that sounds like the brake band is trashed. i havnt gone through an auto in a while. the band is like $40 aftermarket with an overhaul set costing another $90 or so on top of that. its the labor that will eat you up.