Documented failure points and real market prices for the Kenworth T370, sourced and dated.
Confidence 0%5 observed comparables
As of Sep 5, 2026What can make the cheap machine expensive?
Torque converter wear in Allison automatics common to T370 vocational trims causes shuddering and slipping by 300k-400k miles.
Cost not yet verifiedValve body degradation in the same Allison transmission family produces erratic and harsh shifting.
Cost not yet verifiedEGR valve failure common to diesel vocational trucks like the T370 shows up first as rough idle before triggering fault codes.
Cost not yet verifiedA stuck-open EGR valve produces black exhaust smoke, a symptom reported across medium-duty vocational trucks in this weight class.
Cost not yet verifiedCommon questions
How much does a used Kenworth T370 cost?
Observed listings range roughly $29,900 to $69,900 depending on age, condition, and configuration (as of 2026-09-05).
What fails on the Kenworth T370?
The most cited concerns in our evidence record: Allison automatic transmission, Allison valve body, EGR valve. See the risk breakdown above for details and sources.
From the research record
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): Allison automatic transmission: "Symptoms include shuddering during acceleration, slipping between gears, and overheating." https://www.skylinerrepaircenter.com/blog/allison-automatic-transmission-maintenance-and-common-issues
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): Allison valve body: "Valve body problems cause erratic shifting, delayed engagement, and harsh downshifts." https://www.skylinerrepaircenter.com/blog/allison-automatic-transmission-maintenance-and-common-issues
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): EGR valve: "Rough idle is the first sign most drivers notice when their EGR valve starts failing. The engine shakes or vibrates more than normal when sitting at idle." https://www.skylinerrepaircenter.com/blog/truck-egr-valve-problems-symptoms-cleaning-and-replacement
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): EGR valve, sticking open: "Black smoke from the exhaust happens when the EGR valve sticks open, allowing too much exhaust gas back into the combustion chamber." https://www.skylinerrepaircenter.com/blog/truck-egr-valve-problems-symptoms-cleaning-and-replacement
- MARKET (5 real listings, 2026-09-05): low $29,900 / median $46,265 / high $69,900. Agent-sourced: 5 real listings (2019-2022, 180k-420k mi), 3 dealers. $29,900-$69,900, median $46,265.
Sources
- skylinerrepaircenter.com (failure evidence)repair-industry · verified · accessed 2026-09-05
- skylinerrepaircenter.com (failure evidence)repair-industry · verified · accessed 2026-09-05
- soarr.com dealer inventory (5 real listings)dealer-inventory-aggregator · verified · accessed 2026-09-05