Strongest Gearbox Possible
Posted: Wed Jan 21, 2009 2:25 pm
I'd like to put together a gearbox capable of handling 350 to 400hp that doesn't have to be treated like a baby. My application is street only. A few questions:
1. Is this possible?
2. Am I better off creating a 4 speed than a 5 speed?
3. Is the 4-speed Chillcast box 870423 still the strongest case available and are the best one's still only found in ’77-’79?
4. Can I adapt an 89-'90 box larger rear pinion bearing and stronger shift forks to an early 4-speed Chillcast box 870423?
5. Can I adapt the slimmed down profile of the 91-93 synchros and enlarged gear faces to an early 4-speed Chillcast box 870423? The pinion bearing and layshaft bearings were also enlarged on the 91-93 can the early 4-speed Chillcast box 870423 be modified to handle them?
6. Is the Saab Rally Rear steel diff cover the best available?
7. Is Jorgen Eriksson still in business? How do you get a hold of him? Does anyone have experience with his: Special selector rod, Steel selector fingers, Special selector 3/4th, Strengthened Primary Chains, Universal Joint on selector shaft, Special 4 chain primary gears with new chains?
8. Has anyone done this type of modification I mentinon in #7 above?
9. Adding a 4th row of gears and chain to the primaries and modifying them to accommodate an extra bearing on the upper primary as per the Works gearboxes?
10. Are 4 speed dog gears (38570Kr) still available? From who?
Any other recomendations or info greatly appreciated especially from those with actual hands on experience on making a Saab 900 gearbox last with this kind of horsepower.
1. Is this possible?
2. Am I better off creating a 4 speed than a 5 speed?
3. Is the 4-speed Chillcast box 870423 still the strongest case available and are the best one's still only found in ’77-’79?
4. Can I adapt an 89-'90 box larger rear pinion bearing and stronger shift forks to an early 4-speed Chillcast box 870423?
5. Can I adapt the slimmed down profile of the 91-93 synchros and enlarged gear faces to an early 4-speed Chillcast box 870423? The pinion bearing and layshaft bearings were also enlarged on the 91-93 can the early 4-speed Chillcast box 870423 be modified to handle them?
6. Is the Saab Rally Rear steel diff cover the best available?
7. Is Jorgen Eriksson still in business? How do you get a hold of him? Does anyone have experience with his: Special selector rod, Steel selector fingers, Special selector 3/4th, Strengthened Primary Chains, Universal Joint on selector shaft, Special 4 chain primary gears with new chains?
8. Has anyone done this type of modification I mentinon in #7 above?
9. Adding a 4th row of gears and chain to the primaries and modifying them to accommodate an extra bearing on the upper primary as per the Works gearboxes?
10. Are 4 speed dog gears (38570Kr) still available? From who?
Any other recomendations or info greatly appreciated especially from those with actual hands on experience on making a Saab 900 gearbox last with this kind of horsepower.