Engine and Transmission

6,582 topics in this forum

1. Oil thermostat code

   By red bumper, February 4
   • 4 replies
   • 651 views
   • 
   • red bumper
   • February 18

2. Ai 427 intermittent fuel issue 1 2

   By Orange cv713, December 27, 2025
   • 36 replies
   • 2.1k views
   • 
   • fjh
   • February 18

3. MP8 EGR Code 2791 and wont regen

   By Goddy454, December 22, 2024
   • 4 replies
   • 1.5k views
   • 
   • John_MP10
   • February 16

4. 03 Granite Front Main Seal Tool Part #

   By DieselDog5.9, January 25
   • 7 replies
   • 592 views
   • 
   • DieselDog5.9
   • February 14

5. Fire Ring On Head Gaskets 1 2

   By Mackman61, June 19, 2012   

   • head Gaskets Engine
   • 26 replies
   • 8.1k views
   • 
   • BottleHauler84
   • February 12

6. AMI 370 or MP7

   By Straydog954, February 8
   • 6 replies
   • 667 views
   • 
   • 880joe
   • February 11

7. Mack and John Deere injector pumps interchangeable?

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

8. Mack E7 oil cooler leaking oil externally

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

9. American Bosch EM6-300L

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

10. Radiator overflow fill

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

11. Questions for the 12 speed experts

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

12. Aftermarket shift knob.

    By Bliue dm, March 25, 2022
    • 10 replies
    • 4k views
    • 
    • C.A. STONE
    • January 30

13. Hand Primer Pump

    By BOBWhite, January 20
    • 14 replies
    • 1.1k views
    • 
    • Vladislav
    • January 29

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

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

15. E9 nipping up

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

16. Low coolant alarm.

    By TimberJack, January 22
    • 5 replies
    • 523 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
    • 6.2k views
    • 
    • Shadyacresmack
    • January 26

18. 1994 Mack V-Mac E7 Cranks but wont start

    By ToolsMachines, February 18, 2020
    • 14 replies
    • 12k views
    • 
    • Joey Mack
    • January 23

19. 77 R model enging block stamping numbers??

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

20. E Tech 300 EUP

    By TurdFerguson, January 21
    • 21 replies
    • 1.1k views
    • 
    • cruiseliner64
    • January 23

21. 61 B model Jake need one

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

22. Mack Granite mp8 shuts down

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

23. Injection pump stuck full throttle

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

24. AT2612F transmission input shaft

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

25. Need Good Engine brake for E7 350 mechanical

    By mackdaddytruckfixer, January 4
    • 1 reply
    • 350 views
    • 
    • The Heinz
    • January 5