901 Shift Rod Bushing

[Bob Schaefer]

Hi Folks -

In trying to improve how the 901 gearbox in my
'67S engages 1st gear after depressing the clutch,
I've looked at the shifter & linkage bushings. The
only place where any 'slop' or lost motion is
detectable is at the shift rod bushing in the 'L' bracket
behind the shifter. I have two questions about the
replacement bushing (p/n 901-424-291-00) received
yesterday from Pelican:

1. The attached photo shows the new and old
bushings. The new bushing won't fit the bracket,
because it's groove is about 3.4 mm narrower than
the groove in the old bushing. Can anyone shed
some light on what's going on? The wrong bushing?
If so, what's the correct p/n? Or is my 'L' bracket not
original for the '67?? (The old bushing groove is
about 9.0 mm wide; the new bushing about 5.6 mm
wide.)

2. Although it fits the shift rod tighter than the old
bushing, the new bushing i.d. still measures about
0.2 mm larger than the shift rod o.d.. I expected the
new bushing to fit the shift rod with little, or no,
clearance. The rod measures 24.0 mm in diameter,
and does not appear worn. Could anyone who has
replaced this bushing please comment? Should a
new bushing fit 'snugly' on the rod or is some
clearance normal? Maybe I'm splitting hairs here,
but I hoped for a better fit, even considering
manufacturing tolerances.

Thanks in advance for any help.

Best Regards,
Bob S.

[911pcars]

Bob,
I've got this number for the bearing bush:

914 424 224 00

A couple of other wear area-bushings:
Ball socket 911 424 139 00
Shift coupler bushing 695 424 223 00 (2 needed)

These should fit all (most?) 901 and 915 setups. Not sure about anything unique about '67.

Sherwood

[Bob Schaefer]

Thanks Sherwood.

Pelican lists 914-424-224-00 for the '69-'73 and 901-424-291-00 for '65-'68. Is that wrong?? The picture they show for 914-424-224-00 looks like my 'old' bushing.

Best Regards,
Bob

[911pcars]

"Pelican lists 914-424-224-00 for the '69-'73 and 901-424-291-00 for '65-'68. Is that wrong?? The picture they show for 914-424-224-00 looks like my 'old' bushing."

It looks like 901-424-291 isn't working for your parts.

What's wrong with a direct replacement, 14-424-224-00 ?

Sherwood

[Bob Schaefer]

Nothing's wrong with the correct direct replacement.

I'm just trying to prepare myself with all the info, so if Pelcan's info is mistaken, I can point it out to them, and they can fix it. That way the next guy who orders parts for a '67 doesn't get the wrong part like I did......

P.S. The info on their site has changed since I ordered 901-424-291-00 this Monday.......both bushings weren't shown then.

Thanks for the help.

Bob S.

[zenithblue71T]

Hi All,

I have a 1971 911T with recently rebuilt 901 trans. It's extremely sloppy and I'm looking for rifle action long shifts. I don't want a short shift kit and like the long stock throws. Anywho, I'm on Pelican and see a bunch of parts.

Does anyone know if these brass shift couplers work well?

http://www.pelicanparts.com/cgi-bin/...0%281965-86%29

[304065]

WEVO coupler.

[zenithblue71T]

Cool, thanks. Also, is changing out bushings on the shifter a DIY job? I have a Haynes 911 manual and some basic tools.

[Perry911]

WEVO coupler.

A wevo works wonders and is the way to go.

[chris_seven]

I never did like the moulded bushes that are supplied by Porsche as they aren't dimensionally stable in wet or even very humid conditions. They seem to use a compliant material to allow fitting but is has a relatively high level of friction which means they need greasing.

Shifters and couplers are generally neglected and the grease tends to 'gum' up with time and shift quality deteriorates.

The cost of Apex/Belden or other similar universal joints also seems too high and the extra 'degree of freedom' provided isn't necessary.

We have made Delrin parts to replace the complete set of bushes and have used them on all the cars that we have worked on for the last 5 years.

They will work dry and maintain their performance quite well.

The Gearlever bush is held onto the gearknob by fitting a snap ring into a groove machined at the top of the bush.

The shift rod bush which is a good fit on the rod is held into the L bracket with a Starlock type spring clip so the width of the L bracket is unimportant.

The shifter bushes are aslo hard Delrin and have no axial clearance unlike the factory bushes.

I think the bronze bushes are overkill compared to Delrin which are cost effective and last well even on competition cars.