r/DieselTechs is a subreddit with 32k members. The community frequently discusses cummins, looking for, diesel, tools, and job, and they frequently recommend/review multimeter, work boot, and tool brand, and the most common flair used is diagnostic assistance, general assistance, check it out!, that looks expensive!, and solved.
Where diesel techs help other diesel techs with questions, advice, how-tos, and - sometimes - sweet, sweet karma.
Popular Topics in r/DieselTechs
#1
Cummins
27 posts
#2
Looking For
18 posts
#3
Diesel
15 posts
#4
Tools
15 posts
#5
Job
13 posts
#6
Mechanic
13 posts
#7
Engine
12 posts
#8
Transmission
11 posts
#9
Freightliner
9 posts
#10
Fuel
9 posts
Products Discussed in r/DieselTechs
Multimeter
46 reviews
#1
Fluke
4.4★ from 22 reviews
#2
Klein
4.2★ from 6 reviews
#3
Fluke 87V
4.5★ from 2 reviews
Work Boot
27 reviews
#1
Red Wing
4.9★ from 8 reviews
#2
Danner
4.4★ from 5 reviews
#3
Keen
4.0★ from 2 reviews
Tool Brand
11 reviews
#1
Snap-on
4.7★ from 3 reviews
#2
Tekton
4.0★ from 2 reviews
#3
Mayhew
4.0★ from 1 review
Flair Used in r/DieselTechs
#1
Diagnostic assistance
: "Low pressure coming out of fuel pump"
18 posts
#2
General assistance
: "2nd Year apprentice mess up"
11 posts
#3
Check it out!
: "Out with the old, in with the new."
5 posts
#4
That looks expensive!
: "Welp it finally happen boys"
3 posts
#5
SOLVED
: "Tool truck wants 350 for a trailer light tester, so I made one for less than $40"
2 posts
Member Growth in r/DieselTechs
Yearly
+5k members(19.5%)
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About
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Last updated: July 12, 2026