PAOLOP

Hi all!
I would regearing my C4 90 but I have some issue to find the correct 5'th gear ratio.
The 5'th gear of G64 ( 964.302.905.40-41) had different shape to G50 (950.302.905.40-41).
My local shop find 5'th gear ratios but only for G50.

Some advices?

Ciao
Paolo

PAOLOP

No one?

garrett376

These guys have gears for everything and will likely have what you need:
http://www.powerhaus.com/

Give them a call!

PAOLOP

Thanks a lot, Garrett

Paolo

Tom W

Guard may have the gear you are looking for too. http://www.guardtransmission.com/

Cupcar#12

i thought quaife also had them

PAOLOP

I make a mystake!!
The problem is with 4th, not with 5th!

Paolo

PAOLOP

Someone have the e-mail of Guard Transmission?

Paolo

Bill Verburg

The 964 C4 gear shaft is much larger than the g50 shaft in a C2 because the AWD front shaft runs concentrically inside it. As a result the gear sets are unique and to my knowledge unavailable from any alternate supplier.

Jean

Bill I would have thought that the gears inside the box are unrelated to the outside torque tube? I might be wrong most likely, but I am not understanding why the gears themselves would be different.

The G64 boxes have two shafts, a large one that goes into the torque tube, and a smaller one underneath that goes straight to the shifter mechanism, inside th etube as well. I am using the G64 in 2Wd mode, and just leave the larger shaft to turn freely.

Red rooster

The G64-G60 input shaft gears are the same .
As Bill has so correctly said the G64 hollow shaft gears are different to the G50 . The diff drive/ front drive shaft runs inside the hollow shaft .
Be interesting to see if anyone is duing different ratio gears.

Geoff

Bill Verburg

as Geoff explained there are 2 parallel shafts in the transmissions, A transmission gear consists of a set of 2 meshing cogs one on the input shaft and a matching one on the output shaft. The input shaft is the same as in other g50s and takes the same gears, the output shaft of the 964 C4 on the other hand is larger(I think 10mm) in OD because it has to have room for the concentrically mounted front output shaft that runs inside it. Since a trans gear is a set of 2 meshing and matching cogs and since there are no 964 G64 output shaft cogs other than factory(AFAIK) you can't change gearing.

This is not the case w/ 993 transmissions where the viscous coupling is attached directly to the front of the output shaft.



A 993 G64 can be run as a 2wd by simply disconnecting the coupling, a 964 G64 cannot.

Cory Jump

Bill is correct. The factory didn't offer didn't gear ratios for the g64 c4.

I regeared a 89 c4 transaxle about three years ago with different 2nd 3rd and 4th gears from powerhaus II.

993 4wd gearbox is much easier to rework.

Jean

Thanks for the explanation Bill, makes sense now, I am not familiar with the 964 setup it seems

dfinnegan

I have a 91 C4 which was re-geared by the previous owner. He had 3rd, 4th and 5th re-geared. I don't know where the gears came from; it's not on the receipt.