s4 overview

Since its' introduction the "S" series Mendeola Sequential gearboxes have been an absolute SMASH!! It's considered the standard to which all other squentials are measured. The "S" series shifting rivals any other gearbox, LMP to GT! The "S" series with its' 19mm wide reverse gear and removable face plates makes maintenance a no brainer. The full contact shift drum and billet shift forks are designed to be off-road rated. The S-4 platform is equiped with 1.090" wide driving members. The S-5 driving members have .800" wide faces. This fact dictates that the S-5 torque rating be derated by 20-25%. The 8-lug dog rings are utilized in heavy torque loads 450-650 lbs ft. applications (to 7500 RPM). The 6-lug componentry handles medium torrque loads 250-400 lbs ft. and high RPM (to 9500.) The optional 935-300M drive stubs handle any application.

Currently the S4 and S5 are the most used transaxles in big horsepower sand buggies, outnumbering ALL other transaxles, combined.

From Glamis to Baja, they are the Royal Family of Gearboxes!

S4 | S5 Transaxle Options:
· MD series diff (10 or 12 race cars)
· Reverse rotation 4.86, 5.14, and 5.42 ring and pinion

Applications
Max Tire Size
·Sand Buggy   1450 Desert Trak  
·Medium Duty Pre-runner   1650 Padla Trak  
·SCORE Class 5   32"or 35" BFG BAJA T.A. (shaved)  
·SCORE Class 10      
·V4 or V6 Class 1  
 
   
 
Max Engine Max Vehicle Weight

 ·LS1, LS2, LS6

2,800 lbs
·SUBARU TURBO 3.0 6 CYL.   
 
 ·NORTHSTAR  
   
Max HP
   
425 - RACE CAR
   
500 - PRE-RUNNER
   
600 - SAND CAR
       

 

s4 ratios

1st Gears   Ring& Pinion
3.27   3.09   2.91          
  4.57 (4.63, 4.86, & 5.14 are optional)
2nd,3rd, 4th & 5th Gears  
2.21   2.14   2.08   1.93   1.79   1.67
 
1.59   1.56   1.50   1.44   1.37   1.32
   
1.26   1.20   >1.14   1.10   1.04   1.00
   
0.96   >0.92   0.89   0.82   0.72   0.68