transmission cooler lines
Worth a lookShows a sweet-spot price point ($56.32 avg), but soft demand (-18.3% this quarter) keeps it on the watch list.
Avg price
Great$56.32avg listing price — sweet spot $15–$100
Review moat
Great308.92avg incumbent reviews — the moat a new listing must climb
Competition
Great40%top-5 click share — an open shelf
Price range
Good$10.42–$139.19cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Returns
Good2.8%return rate — above 5% kills the launch gate
Market size
Good$326K$326K/yr · 366K searches
Brand share
Okay78%top-5 brand share — brands hold most of the demand
Conversion
Bad1.6%search→purchase rate — share of searches ending in a sale
Growth
Bad-18.3%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, transmission cooler lines is a $326K/yr Amazon United States market (366K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in Mar. Verdict: Worth a look — 52/100.
Data updated Jul 11, 2026 · scored weekly · How we score niches
transmission cooler lines market data
- Units sold / yr
- 6K–8K
- avg 100–250/product
- Revenue / yr
- $338K–$451K
- units × avg price
- Conversion rate
- 1.6%
- Avg BSR
- #366
- Page quality
- 0%
- Prime
- 96%
- Sponsored
- 73%
- Out of stock
- 1.7%
- Avg brand age
- 40 months
- Avg seller age
- 175 days
Competition & brand share
Clicks spread well past the top 5 (40% combined) — an open shelf where new products get seen.Brands
19 falling
Sellers
92
Top-5 brand share
78%
Top 20: 100%
Top-5 click share
40%
Top 20: 71%
Open market
18%
- Dorman25%
- EVIL ENERGY18%
- Generic16%
- GM GENUINE PARTS11%
- A-Premium8%
- Four Seasons4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -18.3% search growth over the last 90 days.Peak months: Mar · busiest ÷ quietest = 1.6×
Top transmission cooler lines search terms
- transmission cooler lines107K/yr
- transmission lines56K/yr
- oil cooler lines49K/yr
- transmission line22K/yr
- transmission cooler line20K/yr
- transmission oil cooler line13K/yr
- transmission cooler hose11K/yr
- trans cooler lines11K/yr
- oil cooler line10K/yr
- transmission lines to radiator10K/yr
Top transmission cooler lines products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
6AN 70 Transmission Fluid Oil Cooler Hose Line kit for GM Chevy Transmission 4L80E TH350 TH400 4L60E 700R4 200-4R TR6060 Ford AOD 4R100 4R70W and C5 Stainless Steel Braided PTFE Hose
Generic$28.494.5★761 rev
EVIL ENERGY 6AN Fuel Line Kit Transmission Cooler Line Kit for 4L60E 4L65E AN6 Nylon Braided Fuel Line Hose Fitting Kit CPE 15FT
EVIL ENERGY$54.734.7★117 rev
Dorman 624-284 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Chrysler/Dodge/Ram Models
Dorman$45.204.6★697 rev
EVIL ENERGY 3/8 Transmission Oil Cooler Hose 5FT 250PSI SAE J1532
EVIL ENERGY$19.724.6★693 rev
Automatic Transmission Oil Cooler Hose 53015
Four Seasons$16.754.6★689 rev
Newest
by launch date
Engine Oil Cooler Hose Assembly Compatible with Chevrolet Silverado For GMC Sierra YUKON replace # 84828848 625-209 625209 5801032 20828695
MYFANDOOR$59.483 rev
GM Genuine Parts 85724972 Engine Oil Cooler Hose
GM GENUINE PARTS$119.8917 rev
6AN SS Braided Transmission Cooler Lines - 70 Compatible with Chevy GM Ford Turbo 4L60E TH350 TH400 700R4 4L65E 4L80E Transmission Line Kit
CMOOD$35.9858 rev
EVIL ENERGY 6AN Fuel Line Kit Transmission Cooler Line Kit for 4L60E 4L65E AN6 Nylon Braided Fuel Line Hose Fitting Kit CPE 15FT
EVIL ENERGY$54.73117 rev
Mandark Car Fuel Line 6AN 10FT Vehicle CPE Fuel Hose for 3/8 Tube Size Nylon Braided Automotive Transmission Oil Cooler Lines Accessories Universal for SUV Sedan Truck
Mandark$12.5830 rev
Trending
90-day click momentum
GM Genuine Parts 84791853 Engine Oil Cooler Hose
GM GENUINE PARTS$85.984.5★
6AN 52 Transmission Fluid Oil Cooler Hose Line kit for GM Chevy Ford GMC Buick Cadillac Cars and Trucks Stainless Steel Braided PTFE Hose
Generic$28.284.5★
Engine Oil Cooler Hose Assembly Compatible with Chevrolet Silverado For GMC Sierra YUKON replace # 84828848 625-209 625209 5801032 20828695
MYFANDOOR$59.482.5★
Dorman 624-153 Automatic Transmission Oil Cooler Hose Assembly Compatible with Select Cadillac / Chevrolet / GMC Models
Dorman$29.814.5★
GXARTS 70 6AN SS Braided Transmission Cooler Hose Lines for 700R4 4L60 4L60E 4L65E 4L80E Compatible with Ford C6/AOD & GM Chevy 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008-2021
GXARTS$29.543.9★
What buyers say about transmission cooler lines
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent product”
“Fit great”
“exactly what I needed”
“Great value for the money”
“Worked like they were supposed to”
“Easy to assemble as well”
“They work great and dont leak and where pretty easy to install and I think it had more power and it definitely shifted better”
“good cheap fuel line”
“They are very durable”
“Simple to replace”
What buyers complain about
“Didn't fit”
“Leaking everywhere”
“Bad quality”
“Broke instantly after install”
“False advertising not -6AN size”
“Split apart after 100 miles of use in my vehicle”
“Won't fit 5.4V 3V”
“Cheap material”
“they didnt snap into the tranny bc they were too thick”
“Cost me a couple grand for a transmission because the hose rated for transmission fluid blew out”
Top return reasons
Common questions
- Is transmission cooler lines profitable to sell on Amazon United States?
- The niche generates $326K/yr across 48 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is -18.3%. Flapen's verdict: Worth a look (52/100).
- How competitive is the transmission cooler lines niche?
- 19 brands and 92 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 78% of demand.
- What do buyers complain about in transmission cooler lines?
- Top complaints mined from reviews: Size-Overall, Leak-Proof, Quality-Overall. The return rate is 2.8%.
- When does demand for transmission cooler lines peak?
- Demand peaks in Mar; the busiest month runs 1.6× the quietest.
- What does it cost to enter the transmission cooler lines niche?
- Listings span $10.42–$139.19; the average listing price is $56.32 (sweet spot $15–$100). The average incumbent carries 309 reviews — the moat a new listing must climb.