Engine and Transmission

6,563 topics in this forum

1. 300+ rebuild 1 2 3 4 25

   By Freightrain, July 9, 2025
   • 621 replies
   • 30.5k views
   • 
   • Freightrain
   • 4 minutes ago

2. Fire Ring On Head Gaskets 1 2

   By Mackman61, June 19, 2012   

   • head Gaskets Engine
   • 26 replies
   • 7.5k views
   • 
   • BottleHauler84
   • Thursday at 08:21 PM

3. AMI 370 or MP7

   By Straydog954, Sunday at 07:37 PM
   • 6 replies
   • 244 views
   • 
   • 880joe
   • Wednesday at 11:11 PM

4. Another MP7 no crank no start with history of burned ecm’s

   By 96bulldogpower, January 30
   • 21 replies
   • 597 views
   • 
   • 96bulldogpower
   • Tuesday at 04:40 AM

5. Occasional Engine surge 1 2 3

   By RS Disposal, November 18, 2025
   • 51 replies
   • 2.1k views
   • 
   • Joey Mack
   • Sunday at 10:15 PM

6. Mack and John Deere injector pumps interchangeable?

   By BronsonA2150, February 7
   • 4 replies
   • 204 views
   • 
   • FarnorthMN
   • February 8

7. Mack E7 oil cooler leaking oil externally

   By longshipconstruction, February 4
   • 4 replies
   • 276 views
   • 
   • Joey Mack
   • February 5

8. Oil thermostat code

   By red bumper, February 4
   • 3 replies
   • 185 views
   • 
   • Joey Mack
   • February 4

9. American Bosch EM6-300L

   By P.L. Roark, February 3
   • 0 replies
   • 221 views
   • 
   • P.L. Roark
   • February 3

10. Radiator overflow fill

    By Raven9, January 30
    • 2 replies
    • 200 views
    • 
    • Raven9
    • February 2

11. Questions for the 12 speed experts

    By Old Macks, January 31
    • 1 reply
    • 251 views
    • 
    • fjh
    • January 31

12. Aftermarket shift knob.

    By Bliue dm, March 25, 2022
    • 10 replies
    • 3.7k views
    • 
    • C.A. STONE
    • January 30

13. Hand Primer Pump

    By BOBWhite, January 20
    • 14 replies
    • 610 views
    • 
    • Vladislav
    • January 29

14. Anyone Know The Cause Of The TRXL Series To Have Gear Whine?

    By bamlogisticsinc, January 28
    • 2 replies
    • 223 views
    • 
    • Freightrain
    • January 29

15. E9 nipping up

    By MicksMack, January 3
    • 7 replies
    • 605 views
    • 
    • fjh
    • January 27

16. Low coolant alarm.

    By TimberJack, January 22
    • 5 replies
    • 350 views
    • 
    • The Heinz
    • January 27

17. E7 350hp to 500hp that will live 1 2 3 4 5

    By mackdaddytruckfixer, December 21, 2025
    • 103 replies
    • 4.3k views
    • 
    • Shadyacresmack
    • January 26

18. 03 Granite Front Main Seal Tool Part #

    By DieselDog5.9, January 25
    • 6 replies
    • 241 views
    • 
    • Joey Mack
    • January 26

19. 1994 Mack V-Mac E7 Cranks but wont start

    By ToolsMachines, February 18, 2020
    • 14 replies
    • 11.4k views
    • 
    • Joey Mack
    • January 23

20. 77 R model enging block stamping numbers??

    By Lmackattack, January 7
    • 4 replies
    • 405 views
    • 
    • Freightrain
    • January 23

21. E Tech 300 EUP

    By TurdFerguson, January 21
    • 21 replies
    • 543 views
    • 
    • cruiseliner64
    • January 23

22. 61 B model Jake need one

    By Richie s, January 20
    • 5 replies
    • 300 views
    • 
    • mowerman
    • January 21

23. Mack Granite mp8 shuts down

    By glake511, January 11
    • 1 reply
    • 260 views
    • 
    • fjh
    • January 11

24. Injection pump stuck full throttle

    By chuckholes, January 2
    • 7 replies
    • 505 views
    • 
    • Joey Mack
    • January 9

25. AT2612F transmission input shaft

    By Wdavis, January 6
    • 0 replies
    • 218 views
    • 
    • Wdavis
    • January 6