Engine and Transmission

6,559 topics in this forum

1. 300+ rebuild 1 2 3 4 23

   By Freightrain, July 9, 2025
   • 573 replies
   • 27.2k views
   • 
   • Freightrain
   • 5 hours ago

2. American Bosch EM6-300L

   By P.L. Roark, 11 hours ago
   • 0 replies
   • 86 views
   • 
   • P.L. Roark
   • 11 hours ago

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

   By 96bulldogpower, Friday at 02:22 PM
   • 20 replies
   • 414 views
   • 
   • The Heinz
   • 16 hours ago

4. Radiator overflow fill

   By Raven9, Friday at 02:32 PM
   • 2 replies
   • 133 views
   • 
   • Raven9
   • Monday at 12:54 AM

5. Questions for the 12 speed experts

   By Old Macks, Saturday at 04:45 PM
   • 1 reply
   • 177 views
   • 
   • fjh
   • Saturday at 05:07 PM

6. Aftermarket shift knob.

   By Bliue dm, March 25, 2022
   • 10 replies
   • 3.6k views
   • 
   • C.A. STONE
   • Friday at 03:40 AM

7. Hand Primer Pump

   By BOBWhite, January 20
   • 14 replies
   • 512 views
   • 
   • Vladislav
   • Thursday at 07:54 PM

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

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

9. E9 nipping up

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

10. Low coolant alarm.

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

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

    By mackdaddytruckfixer, December 21, 2025
    • 103 replies
    • 3.8k views
    • 
    • Shadyacresmack
    • January 26

12. 03 Granite Front Main Seal Tool Part #

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

13. 1994 Mack V-Mac E7 Cranks but wont start

    By ToolsMachines, February 18, 2020
    • 14 replies
    • 11.3k views
    • 
    • Joey Mack
    • January 23

14. 77 R model enging block stamping numbers??

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

15. E Tech 300 EUP

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

16. 61 B model Jake need one

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

17. Occasional Engine surge 1 2

    By RS Disposal, November 18, 2025
    • 42 replies
    • 1.6k views
    • 
    • Geoff Weeks
    • January 20

18. Mack Granite mp8 shuts down

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

19. Injection pump stuck full throttle

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

20. AT2612F transmission input shaft

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

21. Need Good Engine brake for E7 350 mechanical

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

22. 09 Mack MP7 shuts down every 15 minutes

    By VICTORMadera, November 22, 2020
    • 7 replies
    • 2.9k views
    • 
    • mp8_macky
    • January 5

23. Can A Jake Be Added To An E7

    By diesel, October 4, 2008
    • 8 replies
    • 7.4k views
    • 
    • mackdaddytruckfixer
    • January 4

24. Flywheel question

    By Freightrain, January 2
    • 9 replies
    • 404 views
    • 
    • Joey Mack
    • January 3

25. Cam Sensor Issues

    By Aggiebanker, December 30, 2025
    • 4 replies
    • 305 views
    • 
    • fjh
    • December 31, 2025