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T27g (R) specification
For Applications with engines up to '179 kW (240 hp) gross input
power and up to 900 N.m (664 lb-ft) gross input torque.
BATING5
City Bus 900 (664) 17e (2401 1857 (1370) 24,000 (52,911) City Bus
Tour Coach e00 (664) 179 (240) 1 857 (1 370) 24,000 (52,91 1) Tour Coachi
, l.GrossPor^/erratingasde{inedbylsO 1585orSAE11995;2.TurbineTorquelimitbasedoniSCMNstandarddeductions. i
Acceptable full-load engine governed speed 2000 - 2800 rpm
Acceptable engine idle speed range (with transmission in Drive) 500 - 800 rpm
Maximum output shaft speed at 105 kmlhr (65 milhr) - retarder-equipped models only
MSUNT!I{G
To Engine SAE No.2
ln Chassis Rear support available (required for some installations)
}RIVT?EAIilq Iil'TERFACES
TCRQUI e CIiliv!fiTER
Type One stage, three elemen( polyphase.
lncludes standard integral damper which is operational in lockup.
Model
MfCHAiliICAL RA?:C5 (Gearratiosdonotincludetorqueconvertermultiplication)
Range
Stall Torque Ratio
TC-41 1 2.71 1.86 : 1
TC-41 3 2.M Ihird 1.41 :1
TC-415 2.35 Four*r
rc-417 2.20 Fifth
TC-41 8 1.98
I
Allison 4th Generation Electronic Controls wittr closed loop adaptive shifu
Shift Sequences [C = Converter mode (lockup clutch disengaged); L = [o*up mode (lockup clutch engaged)]
Tour Coach
Standard: 1 C-[1 L]-2C-2 L-31-41-51
0ptional: 1 C-[1 Ll-2C-2 L-31-4t-51-61
City Bus
Standard: 1 C-[1 L]-2C-2 L-31-41
Optional: 1 C-[1 L]-2C-2 L-3 L-41-5 L
TCM must be calibrated for "11" option. Second-gear-start calibrations are not available for all vehicle applications,
Driver-to-Transmission lnterface Cab-mounted shift selector, pushbutton or lever with two-digit display (range selected and range attaired)
,l:i-?;.'\ : r_aarl
sAE J1 939, SAE il 587, lS0 9141 , IESCANCommunication Protocol - EngineAlehicle Systems I nterface
CONTfiGt 5Y5TiM
Description
Pi.iYs;{AL }E5E3IPT;CNlnstallation length* Dry weight Depth below transmission centerline
With Deep Oil Sump (Standard) With Shallow oil Sump (optional)
Basic Model 740 mm (29.0 in) 243 kg (535 lbs) 328 mm (12.9 in) 283 mm (11.5 in)
With Retarder 740 mm (29.0 in) 280 kg (615lbs) 328 mm (12.9 in) 283 mm (11.5 in)!
| *Approximate length from engine housing to output flange (depending on output ilange type)
I
fiUTPUT RETAPDTft PR*V|Sl*i{ i*PTiCni}
Type
Capacity
Torque
lntegral, hydraulic
Power
*li- sYSTEid;
Oil type Transynd*, DEXRON"-| ll
Capacity. excluding external circuiG
With Deep Oil Sump 27 litres (29 quarts)
1760 N.m (1300 lb-ft) 373 kW (500 hp) With Shallow OilSump 25 litres (26 quarts)
1490 N.m (1 100 lb-ft) 298 kW (400 hp) Main circuit oil filter Replaceable element integral
Cooler circuit oil filter Replaceable element, integral
SPIED0ME?at FRCIj;5iC i.j
Description N on-zero-crossing square wave
8, 16 or ztO pulses per revolution of transmission output shaftElectronic output from TCM
T?7S
Electronic oil level sensor (0LS)
TA' HCC I.+PH IECVI: I O f\i
Tone wheelMountingLocation
M18 x 1 .5 mefic threadTransmission rear cover or retarder housing
T27S {R}
Location