G64 gearbox woes
Discussion
Hi Guys
im not an Porsche owner .
my build is a Minotaur www.minotaurkitcar.co.uk anyways I bought a G64 gearbox from Clive through Andy GTT the question i have is does anyone see a prob converting this to 2wd serial no G64003L07394 i believe its a porsche 964 year 1990 ,awd i have stripped the top end of the box down so i could check the main gears as i found a broken tooth , everything is good and the tooth came from the front wheel drive part of the box.
the confusion i have is that the shaft that turns the diff is inside the main gearbox shaft if that makes sence so when i turn the diff crown gear it doesnt turn the box. im very confused and am going to have to reassemble the whole box before i spend £100 on gaskets. any thoughts or help would be great
thanks guys...--
does anyone know how the power from the engine gets to the rear wheels if these 2 shafts are free to rotate?
any help or thoughts would be great
stu
im not an Porsche owner .
my build is a Minotaur www.minotaurkitcar.co.uk anyways I bought a G64 gearbox from Clive through Andy GTT the question i have is does anyone see a prob converting this to 2wd serial no G64003L07394 i believe its a porsche 964 year 1990 ,awd i have stripped the top end of the box down so i could check the main gears as i found a broken tooth , everything is good and the tooth came from the front wheel drive part of the box.
the confusion i have is that the shaft that turns the diff is inside the main gearbox shaft if that makes sence so when i turn the diff crown gear it doesnt turn the box. im very confused and am going to have to reassemble the whole box before i spend £100 on gaskets. any thoughts or help would be great
thanks guys...--
does anyone know how the power from the engine gets to the rear wheels if these 2 shafts are free to rotate?
any help or thoughts would be great
stu
Stu,
I can't tell you a great deal, but I do know that the 964 C4 'box has a mechanical torque split mechanism which will provide no drive at all if one axle is free. We experienced exactly this phenomenon when attempting to run a C4 on a dyno in 2 wheel drive mode. Disconnecting the front drive shaft results in no drive at all to the rear axle.
This same phenomenon is NOT experienced with the 993 C4 'box since it uses a Torsen diff and the front drive shaft CAN be disconnected in that case.
In every case where this subject gets raised regarding the conversion of a C4 4WD to 2WD the answer is the same - don't bother!!
Regards
Dave
I can't tell you a great deal, but I do know that the 964 C4 'box has a mechanical torque split mechanism which will provide no drive at all if one axle is free. We experienced exactly this phenomenon when attempting to run a C4 on a dyno in 2 wheel drive mode. Disconnecting the front drive shaft results in no drive at all to the rear axle.
This same phenomenon is NOT experienced with the 993 C4 'box since it uses a Torsen diff and the front drive shaft CAN be disconnected in that case.
In every case where this subject gets raised regarding the conversion of a C4 4WD to 2WD the answer is the same - don't bother!!
Regards
Dave
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