r/DieselTechs is a subreddit with 33k members. The most common kinds of discussions are advice requests and solution requests, and the community frequently discusses cummins, looking for, diesel, tools, and job, and they frequently recommend/review multimeter, work boot, and tool brand.
Where diesel techs help other diesel techs with questions, advice, how-tos, and - sometimes - sweet, sweet karma.
Popular Themes in r/DieselTechs
#1
Advice Requests
: "Members of r/DieselTechs, what do we think about the 6.2/6.5 Detroit Diesel Engine?"
7 posts
#2
Solution Requests
: "Gotta be an easier way right?"
6 posts
#3
Pain & Anger
: "Perkins 404j-22t DPF delete problems"
2 posts
Popular Topics in r/DieselTechs
#1
Cummins
: "Got an offer from Cummins, advice?"
27 posts
#2
Looking For
18 posts
#3
Diesel
: "Members of r/DieselTechs, what do we think about the 6.2/6.5 Detroit Diesel Engine?"
15 posts
#4
Tools
: "New tech, need advice. I have two automotive tool boxes at home and need to bring Tools/ bigger box to semi truck shop tomorrow. It's my second week."
15 posts
#5
Job
: "Job outlook for Diesel mechanics in the upcoming future? (Autonomous trucks)"
13 posts
#6
Mechanic
: "Becoming diesel Mechanic"
13 posts
#7
Engine
12 posts
#8
Transmission
: "No wonder the trans failed"
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
General assistance
: "Any fellow natural gas technicians very switch to working on heavy equipment?"
39 posts
#2
Check it out!
: "Possible 9/11/2001 survivor"
16 posts
#3
Diagnostic assistance
: "2024 cascadia side radar issue"
12 posts
#4
That looks expensive!
: "I wonder where that piece went. Oh, nevermind."
8 posts
#5
SOLVED
: "Tool truck wants 350 for a trailer light tester, so I made one for less than $40"
4 posts
Member Growth in r/DieselTechs
Yearly
+5k members(17.6%)
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About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/DieselTechs, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: August 26, 2026