G50 gearbox and ancillaries FS

[911pcars]

G50 gearbox and conversion parts package FS

I recently purchased a running and road-tested 3.2 drivetrain and have decided to part with the G50/5-speed gearbox (open dif) and related conversion pieces as a package. There were no docs or working speedo on the vehicle, an '81 SC with a 959 body kit. However, all is fine. Shifts good; synchros good. This gearbox (87-89) has a short nose and will easily fit earlier 911s with very minor modifications to clear the torsion bar tube.

Here's what's included. SOLD

- G50-01 5-speed gearbox as equipped from 87-89 911 with aluminum gearbox mount, clutch slave cylinder/hose and speedo sensor.
- Starter ring gear
- Matching Bosch starter motor
- Sachs 240mm Turbo racing aluminum pressure plate (11.95 lbs)
- Turbo clutch disc w/TO bearing
- 3.2/G50 conversion flywheel/pilot bearing. Clutch/flywheel package looks relatively new. Excellent condition.
- G50 Shifter assy
- G50 Shift tube
- G50 Shift coupler
- G50 pedal assy. with clutch master cylinder
- Dual fluid reservoir w/mount bracket for brake and clutch circuits

Note: flywheel not in this photo, but included


Gearbox






I believe the gear ratios are as follows:
G50-01:
1st, 3.500
2nd, 2.059
3rd, 1.409
4th, 1.125
5th, 0.889
Final drive is 3.44:1

Sachs turbo 240mm pressure plate and TO bearing; Sachs Race Engineering, part no. 88 3083 999 574. TYP GMFZ 240. List price for the pressure plate alone is $1465.74
http://www.**********.com/Part-Number/Clutch-Pressure-Plate-Aluminum-(1195-lbs)-(wrelease-bearing)-934--early-935-Type-wRight-Side-Up-Trans-__883083999574_SAC_D41A2197.aspx











more in following post.

My PM might be full. Use email: slee632@yahoo.com

[911pcars]

G50 gearbox and parts, cont'd

Sachs turbo clutch disc for above




240mm 3.2/G50 Flywheel w/pilot bearing (11.5 lbs.)




G50 shift assy.


G50 Brake pedal assy. w/clutch master cylinder:


G50 Dual master cylinder reservoir

[Anastasios]

Wow !
The bellhousing and mainshaft are already shortened on this one !
It can be used at all lwb cars without to touch the torsion tubes...

Tasos

[911pcars]

Bump

[spuggy]

That's the genuine shifter conversion piece from PMS for the SBH conversion.

This is an amazing deal! I wish you'd posted it 2 months ago...

[tocobill]

PM'd via email.

[tocobill]

For all the g50 conversion pro's ....

So it looks like the bell is machined and the main shaft is shorter ... correct? What else has to be done to fit this in a 86 tub with a 3.6 non varioram? Just elongating the rear seat hump to clearance? I dont want to cut the torsion tubes. Thanks!

[IMR-Merlin]

Better weight distribution also.... you can move the engine more forward without adding too much driveshaft angle...

Bump for a great deal

[911pcars]

Originally Posted by tocobill

For all the g50 conversion pro's ....

So it looks like the bell is machined and the main shaft is shorter ... correct? What else has to be done to fit this in a 86 tub with a 3.6 non varioram? Just elongating the rear seat hump to clearance? I dont want to cut the torsion tubes. Thanks!

Several others have asked as well. I'm not a G50 conversion expert, but the parts were pulled from a working and road-tested '81 SC. The torsion bar tube was only slightly modified for clearance by gently massaging the outer sheet metal tube with a BFH. I didn't notice any other sheet metal bumps for clearance. Don't know about any previous mods to the G50. I didn't ask the seller, but from various internet posts, it has all the signs of a G50 converted to short nose. At any rate, it fits into a 915 chassis.

Photo of the G50 in the SC before removal. Note relationship between trans. mount and sway bar. Looks like the standard mount location on the torsion bar tube. The aluminum transmission mount bolts directly to the gearbox - no adapter.



Other than the parts shown, one would need a clutch hydraulic line added from the clutch master cylinder (on pedal assy.) to the clutch slave cylinder. Please confirm the correct inboard CV joints as well.

Sherwood

[tocobill]

Do you happen to have any picks of the "massaging" of the torsion tube?

[spuggy]

Originally Posted by 911pcars

Several others have asked as well. I'm not a G50 conversion expert,

Neither am I, but I just sourced all the parts for this conversion from PMS.

IIRC, there's a stud kit for engine->transaxle which you might also need.

The torsion bar tube was only slightly modified for clearance by gently massaging the outer sheet metal tube with a BFH. I didn't notice any other sheet metal bumps for clearance. Don't know about any previous mods to the G50. I didn't ask the seller, but from various internet posts, it has all the signs of a G50 converted to short nose. At any rate, it fits into a 915 chassis.

The massaging with a BFH is expected; you can also grind/cut the non-functional outer shell and weld a flat plate back on for the same effect.

Photo of the G50 in the SC before removal. Note relationship between trans. mount and sway bar. Looks like the standard mount location on the torsion bar tube. The aluminum transmission mount bolts directly to the gearbox - no adapter.

That's really interesting; PMS used to supply weld-on blocks to space out the cross-member; now they provide a modified cross-member that takes 915 tranny mounts - and incorporates the spacing previously supplied by the blocks (with slotted bolt holes).

Neither the chassis welding or any modification of the cross-member looks to have been done to that. No idea - but clearly it fitted

You do need spacers for the sway bar console; PMS sells them.

Originally Posted by 911pcars

Other than the parts shown, one would need a clutch hydraulic line added from the clutch master cylinder (on pedal assy.) to the clutch slave cylinder.
Sherwood

PMS can provide ex-stock either a hydraulic line the exact correct length for the SBH conversion (the gearbox moves back because of the shortened nose - which is why the shift coupler is also longer), or an adapter to bolt onto the factory line, if you have that.

Originally Posted by 911pcars

Please confirm the correct inboard CV joints as well.

It's the late 915/G50 108mm flanges; need the late axles to match with the attached stubs - which should go into all hubs from '74 up, according to my reading of PET.

The trick stuff for the SBH conversion is the flywheel, pressure plate and release bearing. Essentially, it uses a early 3.0 930 (75-77) spring-centered plate, and there's a custom pilot bearing and a low-profile throw-out bearing/flywheel bolts to make it clear.

For a 3.6 or EFI conversion, you may need a 60-2 flywheel.

Did I mention I really wish you'd posted this for sale two months ago?

[911pcars]

Originally Posted by tocobill

Do you happen to have any picks of the "massaging" of the torsion tube?

Unfortunately, no. However, I understand "BFH" and swing force is a relative thing. Having only dented chassis sheet metal for added 915 clearance, I can't say how much force is needed to move torsion bar metal. I suppose cutting out the offending section, then welding in a flat piece to span the gap might be a little less traumatic.

Sherwood

[tocobill]

Pm via email.

[spuggy]

Originally Posted by 911pcars

Unfortunately, no. However, I understand "BFH" and swing force is a relative thing. Having only dented chassis sheet metal for added 915 clearance, I can't say how much force is needed to move torsion bar metal. I suppose cutting out the offending section, then welding in a flat piece to span the gap might be a little less traumatic.

Sherwood

Here's some pictures of what one member found it necessary to do - we all like pictures, right?

http://forums.pelicanparts.com/porsche-911-technical-forum/440191-verify-g50-shortened.html


Another approach is to graft in G50 torsions; not for the easily intimidated - and can ruin the car if not done correctly:

http://forums.pelicanparts.com/porsche-911-technical-forum/280341-g50-conversion-project-begins.html

[911pcars]

FWIW, the gearbox numbers:

G50-01 = G50 trans
7 = trans for 6 cylinder
4 = 5 speed USA/Japan/M298)
H = 1987 model
06848 = serial number



Sherwood

[911pcars]

bump again

[911pcars]

Still available.

[KTL]

Great info by spuggy to help with the sale of this kit. Just one thing to clarify

Originally Posted by spuggy

You do need spacers for the sway bar console; PMS sells them.

You don't necessarily need the sway bar spacers if the sway bar is from a 87-89 G50 car. See in Sherwood's picture, the bar has a kink in it? Porsche did that on the G50 cars to clear the trans crossmember.



Good luck with the sale Sherwood. Nice collection of goods to get someone REALLY close to a complete G50 swap.