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This is a listing of transmission options for various B models that I have sales
literature for. Do not consider this to be a total list of transmissions used since
I do not have a complete set of sales literature and also Mack could have built some
B's with transmissions that were not listed in literature.

The explanation of transmission letters and numbers below will, hopefully, clear up
some of the mud on the following pages.


TR	     --	5 speed transmission without compound box attached.

TRD	     --	5 speed transmission with 2 speed compound box attached.
		This is called a duplex transmission.

TRDL         --	Same as above but with aluminum case. L stands for weight
		reduced or light weight.

TRDX	     --	Same as TRD but with low hole gear. X stands for severe service.

TRDXT        -- Same as above with the addition of a transfer case for front wheel drive.

TRT	     -- 5 speed transmission with 3 speed compound box attached.
		This is called a triplex transmission.

TRTL         --	Same as above but with aluminum case. L stands for weight 
		reduced or light weight.

TRTX         -- Same as TRT but with low hole gear. X stands for severe service.

TRQ          --	5 speed transmission with 4 speed compound box attached.
		This is called a quadruplex transmission.


The numbers following the letters tell sizes and revisions which is over my head.
The last number will tell some important features.


    0	--	Transmission is overdrive	in high gear

		The following do not apply to straight 5 speed transmissions 

    3	--	Transmission is called a mono-shift 

   30	--	Transmission is called an overdrive mono-shift 

    5    	--	Transmission is called a uni-shift

   50	--	Transmission is called an overdrive uni-shift 
	


B-13


TR-73



B-20



TR-73          optional 2 speed rear
TR-730         optional 2 speed rear



B-23



TR-771



B-30



TR-73
TR-771  	optional 2 speed rear
TR-85
TR-73		with TRA-20



B-33


TR-771
TR-774	        optional 2 speed rear
TRD-77
TRQ-77
TRD-775



B-332



TR-771



B-334



TRDXT-778



B-34



TR-771



B-37



TR-771
TRD-77
TRD-775



B-41



TR-671	        with aux. 6231A or D
TR-6710 	with aux. 6231A or D
TR-771	  	with aux. 6231A or D
TR-7710		with aux. 6231A or D
TRD-67
TRD-670
TRD-77
TRD-770
TRD-6730
TRD-7730
TRDX-670
TRDX-770



B-42 and B-422



TR-771		optional aux. 6231A or D or 7231A or B
TRD-77
TRD-773
TRD-775
TRDX-770
TRDX-7780
TRQ-77
TRQ-770



B-42TPB



TRDX-770



B-421



TR-771		optional aux. 6231A or D
TR-774
TRD-77
TRD-773
TRQ-77
TRQ-770



B-426 and B-4226



TRDXT-778



B-43



TR-671		with aux. 6231A or D or 7231A or B or 8031C
TRD-67
TRD-670
TRDX-770
TRTX-670



B-44



TR-771
TRD-77
TRD-775         		
B-44TPB
TRDX-7770



B-45



TRQ-770



B-46 and B-462


TR-771
TRD-77
TRDX-770
TRDX-7780
TRQ-77



B-47



TRD-77
TRQ-770
MT-41



B-50



TR-771
TR-7710
TRD-77
TRD-770
TRD-773
TRD-7730



B-53



TRTX-670
TRQ-7210    	(called 14 speed)
TRQ-7220    	(called 18 speed)



B-57



TRTX-670
TRQ-7220 



B-576



?????



B-60



TR-671		optional 2 speed rear
TR-671		with aux. 8035G
TR-6710
TRD-67
TRDL-67
TRD-670
TRDX-670
TRD-673
TRD-675
TRTL-72
TRQ-720



B-61 and B-613



TR671		with aux. 8035G
TR6710 		with 2 speed rear
TR-72		with aux 8031C or G or 8035G
TR-720		with aux. 8031C or G or 8035G
TR-720		with 2 speed rear
TRD-67
TRDL-67
TRD-670
TRDL-670
TRD-673
TRD-6730
TRD-675
TRDL-675
TRD-6750
TRDL-6750
TRD-72
TRDL-72
TRD-720
TRDL-720
TRD-720	 	with aux. 8031C or 8035G
TRDX-720
TRDL-725
TRDL-7250
TRTL-72
TRTL-720
TRQ-72
TRQ-720



B-61SE and B-613SE



TRD-720
TRDX-720
TRQ-7210	(called 14 speed)			







B-615



TR-7220         with aux. 8031C or P or 8035P
TRD-722
TRDL-722
TRD-7220
TRD-7220	with aux. 8031C or P
TRDL-7220
TRD-7225
TRDL-7225
TRD-72250
TRDL-72250
TRT-722
TRTL-722
TRT-7220
TRTL-7220
TRQ-7210
TRQ-7220
TRQL-7220



B-62



TR-671         	optional aux. 8031C
TRDX-670



B-63 and B-633



TR-72		with aux. 8031C or G
TR-720		with aux. 8031C or G
TRDX-720
TRQ-72
TRQ-720



B-64



TR-671
TRDL-67
TRDL-675



B-65



TR-72		with 2 speed rear
TR-720		with 2 speed rear
TRD-67
TRDL-67
TRD-670
TRDL-670
TRD-675
TRDL-675
TRD-6750
TRDL-6750
TRD-72
TRDL-72
TRD-720
TRDL-720
TRDL-725
TRDL-7250
TRTL-72



B-66



TR-671
TRD-67
TRDL-67
TRD-670
TRD-675
TRDL-675



B-67



TR-72		with 2 speed rear		
TR-720	        with 2 speed rear
TRD-67
TRDL-67
TRD-670
TRDL-670
TRD-675
TRDL-675
TRD-6750
TRDL-6750		
TRD-72
TRDL-72
TRD-720
TRDL-720
TRDL-725
TRDL-7250
TRTL-72





B-68



TR-671		optional 2 speed rear or aux. 8031C or G or 8035G
TRD-67		optional aux. 8035G
TRDL-67
TRD-670
TRDL-670
TRDX-670
TRD-675
TRDL-675
TRD-72
TRDL-725
TRTL-72
TRTX-670
TRQ-720
TRQ-7210	(called 14 speed)



B-70



TR-72		optional 2 speed rear or aux. 8035G
TR-720	        optional 2 speed rear or aux. 8035G
TRD-72
TRD-720
TRDX-720
TRDL-725
TRDL-7250
TRTL-72
TRQ-72
TRQ-720



B-71



TR-720		with 2 speed rear or aux. 8035G
TRD-72
TRD-720
TRDX-720



B-72



TR-72		optional aux. 8035G
TR-720
TRDL-725
TRDL-7250
TRTL-72
TRQ-72



B-73 and B-733



TR-72		with aux. 8035G
TR-720	        with aux. 8035G
TRDL-725
TRD-7250
TRDL-7250
TRTL-72
TRT-720
TRQ-72
TRQ-720



B-75 and B-753



TR-72		with aux. 8031C or 8035G
TRDL-725
TRDL-7250
TRTL-72
TRTL-720
TRQ-72
TRQ-720
TRQ-7210



B-755



TR-7220		with 8031P or 8035P
TRD-7225
TRDL-7225
TRD-72250
TRDL-72250
TRT-722
TRTL-722
TRT-7220
TRTL-7220
TRQ-7220	(called 18 speed)
TRQL-7220	(called 18 speed)



B-773



TRTL-72



B-80



TR-72
TR-720		with aux. 8031C
TRD-720
TRQ-72
TRQ-720





B-81 and B-813



TR-720		with aux. 8031C
TRD-720
TRQ-72
TRQ-720
TRQ-7210



B-8136



TRDXT-720



B-815



TR-130		with aux. 8031C
TRQ-7210



B-83 and B-833



TR-720		with aux. 8031C
TRD-720
TRQ-72
TRQ-720
TRQ-7210



B-85 and B-853



TR-130		with aux. 8031C



B-87 and B-873



TR-130		with aux. 8031C




Now that you have a headache and burning eyes from reading about which B Model
used which transmission, lets look at the gear ratios of all these.

                                    
Transmissions without compounds


	

TR-73 (Fuller)


		

TR-730 (Fuller)


		

TR-85 (Fuller)



    5th  -  1.00				     0.77			    1.00
    4th  -  1.42				     1.00			    1.41
    3rd  -  2.52				     1.80			    2.46
    2nd  -  4.30				     3.48			    4.61
    1st  -  7.53				     6.10			    8.03

	

TR-671			TR-6710



    5th  -  1.00				     0.79		
    4th  -  1.29				     1.00
    3rd  -  2.30				     1.92
    2nd  -  4.35				     3.64
    1st  -  8.05				     6.74

	

TR-771			TR-7710			TR-774



    5th  -  1.00				     0.80			    1.00
    4th  -  1.31				     1.00			    1.31
    3rd  -  2.03				     1.69			    2.03
    2nd  -  3.83				     3.19			    3.83
    1st  -  7.08				     5.89			    7.08

	

TR-72				TR-720			TR-130



    5th  -  1.00				     0.78			    0.71
    4th  -  1.62				     1.00			    1.00
    3rd  -  2.60				     1.75			    1.81
    2nd  -  4.32				     3.12			    3.13
    1st  -  7.53				     5.45			    5.83

					

MT- 41



				Allison 6 speed automatic
				( That's right, B Model fans,
				   it's an automatic !! )





                    

Brown Lipe auxiliary mid ship mounted transmissions



		

6231A					6231D	


	over	-   0.86				    0.74
	direct  -   1.00				    1.00
	under	-   1.24				    2.14

		

7231A					7231B



	over	-   0.74				    0.86
	direct  -   1.00				    1.00
	under   -   2.14				    1.24

		

8031C					8035G



	over	-   0.75				    0.84
	direct	-   1.00				    1.00
	under	-   2.59				    1.29



		

Truckstell auxiliary mid ship mounted transmission



                                     

TRA-20



				over	-     ??
				direct	-     ??
				under	-     ??
		This aux. trans. has dual outputs for tandem drive axles.
		It also has an additional shift lever to disengage one drive axle for highway use.




                                  

Mono-Shift Transmissions



		

TRD-673				TRD-6730



	    5H	-    1.00				     0.79
	    5L	-    1.28				     1.08
	    4H	-    1.63				     1.00
	    4L	-    2.09				     1.37
	    3H	-    2.60				     1.92
	    3L	-    3.34				     2.63
	    2H	-    4.35				     3.64
	    2L	-    5.59				     4.98
	    1H	-    8.05				     6.74
	    1L	-   10.34				     9.22


		

TRD-773				TRD-7730



	    5H	-    1.00				     0.80
	    5L	-    1.28				     1.10
	    4H	-    1.53				     1.00
	    4L	-    1.95				     1.38
	    3H	-    2.43				     1.69
	    3L	-    3.10				     2.34
	    2H	-    3.83				     3.19
	    2L	-    4.89				     4.41
	    1H	-    7.08				     5.89
	    1L	-    9.04				     8.16



                                        
                                 

 Uni-Shift Transmissions




		

TRD-675				        TRD-6750
		TRDL-675				TRDL-6750



	    5H	-    1.00				     0.79
	    5L	-    1.28				     1.08
	    4H	-    1.63				     1.00
	    4L	-    2.09				     1.37
	    3H	-    2.60				     1.92
	    3L	-    3.34				     2.63
	    2H	-    4.35				     3.64
	    2L	-    5.59				     4.98
	    1H	-    8.05				     6.74
	    1L	-   10.34				     9.22

		

TRDL-725				TRDL-7250



	    5H	-    1.00				     0.78
	    5L	-    1.28				     1.04
	    4H	-    1.62				     1.00
	    4L	-    2.08				     1.33
	    3H	-    2.60				     1.75
	    3L	-    3.34				     2.34
	    2H	-    4.32				     3.12
	    2L	-    5.53				     4.16
	    1H	-    7.53				     5.45
	    1L	-    9.65				     7.25

		

TRD-775				TRD-7225



	    5H	-    1.00                               no information
	    5L	-    1.28
	    4H	-    1.53
	    4L	-    1.95
	    3H	-    2.43
	    3L	-    3.10
	    2H	-    3.83
	    2L	-    4.89
	    1H	-    7.08
	    1L	-    9.04	  		 				 				 		 	

				  						    			 			


 	   		

                                        

2 Stick Duplex Transmissions



		

TRD-67				      TRD-670
		TRDL-67				TRDL-670



	    5H	-    1.00				     0.79
	    5L	-    1.27				     1.09
	    4H	-    1.63				     1.00
	    4L	-    2.06				     1.39
	    3H	-    2.60				     1.92
	    3L	-    3.29				     2.67
	    2H	-    4.35				     3.64
	    2L	-    5.51				     5.06
	    1H	-    8.05				     6.74
	    1L	-   10.20				     9.37

		

TRD-72				      TRD-720
		TRDL-72				TRDL-720	



	     5H	-    1.00				     0.78
	     5L	-    1.28				     1.04
	     4H	-    1.62				     1.00
	     4L	-    2.08				     1.33
	     3H	-    2.60				     1.75
	     3L	-    3.34				     2.34
	     2H	-    4.32				     3.12
	     2L	-    5.53				     4.16
	     1H	-    7.53				     5.45
	     1L	-    9.65				     7.25

		

TRD-77				       TRD-770



	     5H	-    1.00				     0.80
	     5L	-    1.29				     1.11
	     4H	-    1.53				     1.00
	     4L	-    1.98				     1.39
	     3H	-    2.43				     1.69
	     3L	-    3.14				     2.35
	     2H	-    3.83				     3.19
	     2L	-    4.95				     4.44
	     1H	-    7.08				     5.89
	     1L	-    9.15				     8.20													

							 			 					 	



                         

2 Stick Duplex Transmissions With Low Hole




		

TRDX-670


				

TRDX-720



	     5H	-    0.79				     0.78
	     5L	-    1.84				     1.85
	     4H	-    1.00				     1.00
	     4L	-    2.34				     2.38
	     3H -    1.92				     1.75
	     3L	-    4.50				     4.17
	     2H	-    3.64				     3.12
	     2L	-    8.53				     7.42
	     1H	-    6.74				     5.45
	     1L	-   15.77				    12.94

		

TRDX-770
		TRDX-7770	


			

TRDX-7780	


	
	     5H	-    0.80				     0.80
	     5L	-    1.60				     1.58
	     4H	-    1.00				     1.00
	     4L	-    2.01				     1.98
	     3H	-    1.69				     1.69
	     3L	-    3.39				     3.34
      	     2H	-    3.19				     3.19
	     2L	-    6.41				     6.31
	     1H	-    5.89				     5.84
	     1L	-  11.84 				    11.56

                          

2 Stick Duplex Transmission With Low Hole and 
                                  Transfer Case For Front Wheel Drive	




		

TRDXT-720	


		

TRDXT-776


			

TRDXT-778



	     5H	-    0.78			     1.00			     1.00
	     5L	-    1.95			     2.92			     2.93
	     4H	-    1.00			     1.62			     1.31
	     4L	-    2.50			     4.72			     3.83
	     3H	-    1.75			     2.66			     2.03
	     3L	-    4.38			     7.76			     5.95
	     2H	-    3.12			     4.36			     3.83
	     2L	-    7.81			    12.72			    11.24
	     1H	-    5.45			     8.05			     7.02
	     1L	-   13.62			    23.48			    20.58					 														



                                       

2 Stick Triplex Transmissions




					 

TRT-720


		 

 TRT-722		TRT-7220
		TRTL-72		TRTL-720		  TRTL-722		TRTL-7220



	  5HS	-    0.85		     0.69		     0.86		    No
	  5D	-    1.00		     0.84		     1.00		Information
	  5LS	-    1.18		     1.00		     1.19
	  4HS	-    1.38		     0.83		     1.39
	  4D	-    1.62		     1.00		     1.62
	  4LS	-    1.92		     1.19		     1.93
	  3HS	-    2.22		     1.45		     2.23
	  3D	-    2.60		     1.75		     2.60
	  3LS	-    3.07		     2.10		     3.10
	  2HS	-    3.69		     2.59		     3.70
	  2D	-    4.32		     3.12		     4.32
	  2LS	-    5.09		     3.73		     5.14
	  1HS	-    6.42		     4.51		     6.45
	  1D	-    7.53		     5.45		     7.53
	  1LS	-    8.88		     6.51		     8.96


                             

2 Stick Triplex Transmission With Low Hole 


									
				

TRTX-670	



				5D	-    0.79
				5Split	-    1.09
				5LL	-    1.99
				4D	-    1.00
				4Split	-    1.39
				4LL	-    2.53
				3D	-    1.92
				3Split	-    2.67
				3LL	-    4.86
				2D	-    3.64
				2Split	-    5.05
				2LL	-    9.22
				1D	-    6.74
				1Split	-    9.35
				1LL	-  17.03



                                

 2 Stick Quadruplex Transmissions





		

TRQ-77		


			        

TRQ-770


	  5HS	-    0.85					     0.83
	  5D	-    1.00					     1.02
	  5LS	-    1.17					     1.25
	  5LL	-    2.15					     2.18
	  4HS	-    1.38					     1.00
	  4D	-    1.62					     1.23
	  4LS	-    1.90					     1.50
	  4LL	-    3.48					     2.62
	  3HS	-    2.27					     1.78
	  3D	-    2.66					     2.19
	  3LS	-    3.11					     2.66
	  3LL	-    5.70					     4.66
	  2HS	-    3.72					     3.19
	  2D	-    4.36					     3.92
	  2LS	-    5.10					     4.77
	  2LL	-    9.35					     8.35
	  1HS	-    6.88					     5.84
	  1D	-    8.05					     7.18
	  1LS	-    9.42					     8.74
	  1LL	-   17.27					    15.29


		

TRQ-72			TRQ-720		TRQ-7210		TRQ-7220



	  5HS	-    0.85		     0.66		     0.69 		     0.70
	  5D	-    1.00		     0.78		     0.84		     0.84
	  5LS	-    1.18		     0.91		     1.00		     1.01
	  5LL	-    2.52		     1.95		     2.12		     2.13
	  4HS	-    1.38		     0.85		     0.83		     0.84
	  4D	-    1.62		     1.00		     1.00		     1.00
	  4LS	-    1.91		     1.17		     1.19		     1.20
	  4LL	-    4.08		     2.50		     2.53		     2.53
	  3HS	-    2.22		     1.49		     1.45		     1.47
	  3D	-    2.60		     1.79		     1.75		     1.76
	  3LS	-    3.07		     2.06		     2.10		     2.10
	  3LL	-    6.56		     4.39		     4.44		     4.44
	  2HS	-    3.68		     2.65		     2.59		     2.61
	  2D	-    4.32		     3.12		     3.12		     3.13
	  2LS	-    5.09		     3.66		     3.73		     3.74
	  2LL	-   10.88		     7.82		     7.91		     7.92
	  1HS	-    6.42		     4.62		     4.51		     4.55
	  1D	-    7.53		     5.45		     5.45		     5.45
	  1LS	-    8.88		     6.39		     6.51		     6.52
	  1LL	-   18.96		    13.63		    13.78		    13.80