r/DieselTechs is a subreddit with 33k members. The most common kinds of discussions are solution requests and advice 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
Solution Requests
: "Homemade tools"
9 posts
#2
Advice Requests
: "Please help!"
7 posts
#3
Pain & Anger
: "Perkins 404j-22t DPF delete problems"
3 posts
#4
Ideas
: "Exhaust sealant ideas"
1 post
Popular Topics in r/DieselTechs
#1
Cummins
: "First time doing one of these; isb 6.7 Cummins"
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
: "Homemade Tools"
15 posts
#5
Job
: "Western Star Clutch Jobs"
13 posts
#6
Mechanic
: "Entering as a Diesel Mechanic at age 29."
13 posts
#7
Engine
: "Anyone work for Cummins on here? Wondering about there Engine tech jobs"
12 posts
#8
Transmission
: "customer said my truck won’t shift"
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
: "Western Star Clutch Jobs"
32 posts
#2
Check it out!
: "Possible 9/11/2001 survivor"
27 posts
#3
That looks expensive!
: "Ladies and gentlemen, we got him."
14 posts
#4
Diagnostic assistance
: "DT466E making me angry"
10 posts
#5
SOLVED
: "Tool truck wants 350 for a trailer light tester, so I made one for less than $40"
5 posts
Member Growth in r/DieselTechs
Yearly
+5k members(18.2%)
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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 15, 2026