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-   -   915 Transmission shift 3-4-5 problem (http://forums.pelicanparts.com/porsche-911-technical-forum/1011312-915-transmission-shift-3-4-5-problem.html)

hbrand 10-25-2018 02:03 PM

915 Transmission shift 3-4-5 problem
 
The shifter in my 1978 Porsche 911 has no resistance going to 3-4 -5th gear.
1-2 gear is spring loaded to the left, but when I go for 3rd gear I easily end up in 5th gear with zero spring load.
Is the problem the shifter or the transmission ??
I bought the car that way.
Thanks, and greetings,
Harold

pete3799 10-25-2018 02:59 PM

A stock shift lever is not spring loaded to the left. Only 5th and reverse are spring loaded.
You may have an aftermarket set up. Take a picture of it.

Trackrash 10-25-2018 03:42 PM

Could be shifter bushings, shift rod coupler, or the guide fork in the transmission came loose.

Pull up the shift boot and take a picture so we know what shifter you have.

Flat6pac 10-25-2018 03:47 PM

I’ll put the money on the guide fork on the inspection plate
If that’s the fault replace the whole plate and fork, don’t try to fix it
Bruce

hbrand 10-26-2018 07:25 AM

Murphy's Law wins again
 
Quote:

Originally Posted by pete3799 (Post 10227679)
A stock shift lever is not spring loaded to the left. Only 5th and reverse are spring loaded.
You may have an aftermarket set up. Take a picture of it.

Part 3 in the drawing is installed upside down. This puts the shifter spring loaded to the left side.
What a crappy thing to do.
Greetings, and thanks

http://forums.pelicanparts.com/uploa...1540567437.jpg

hbrand 10-26-2018 11:52 AM

more shifter woes
 
Turning part 3 around would also not work.
The shift fork is for a standard shifter while all other parts are
from a short shift kit.
So need a short shifter shift fork. WOW

911pcars 10-26-2018 04:03 PM

Quote:

Originally Posted by hbrand (Post 10228262)
Part 3 in the drawing is installed upside down. This puts the shifter spring loaded to the left side.
What a crappy thing to do.
Greetings, and thanks

http://forums.pelicanparts.com/uploa...1540567437.jpg

There's no indication in your text you have a 930 gearbox, yet that illustration shows a 930 shift housing.

An early SC 915 shift housing illustration follows:
http://forums.pelicanparts.com/uploa...1540598044.png

Not sure why your factory stock 915 shift lever has spring tension on the 1/2 side. Typically, only on 5th/Rev. AFAIK, a 930 4-speed turbo shifter doesn't have any springs

The issue may be due to a worn front shift shaft bushing (item 22 above). Excess play here prevents the lever from selecting the proper gears.
http://forums.pelicanparts.com/uploa...1540597745.jpg

Sherwood


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