A lower-than-expected volume of trade-ins has allowed used Class 8 truck values to remain strong, while medium-duty segments are mixed, according to the J.D. Power & Associates survey of the used truck market in April.

According to the report:

• 2015 model year Class 8 sleeper trucks sold for an average of $45,500, netting $4,750 (11.7%) more money than in March.

• 2014 model year Class 8 sleeper trucks sold for an average of $34,000, netting $1,250 (3.5%) less money than in March.

• 2013 model year Class 8 sleeper trucks sold for an average of $33,250, netting $1,750 (5.6%) more money than in March.

• 2012 model year Class 8 sleeper trucks sold for an average of $26,500, netting $500 (1.9%) less money than in March.

• 2011 model year Class 8 sleeper trucks sold for an average of $25,500, netting $4,750 (22.9%) more money than in March.

Medium-duty used truck numbers bounced back somewhat after a flat February. Medium-duty segments were mixed in March, with cabovers recovering from a weak February and conventionals flat to downwards.

• Class 3-4 cabovers sold for an average of $16,486 in March, up $2,292 (16.1%) higher than in February.

• Class 4 conventional truck trucks lost ground for the second month in a row, averaging $18,921 in March, $1,369 lower than in February.

• Class 6 conventional trucks sold for an average of $19,945, $112 lower (0.6%) than in February.

Looking ahead, J.D. Power expects the supply of used trucks to increase noticeably as the second quarter unfolds, but also that demand has imporved in recent months, which will keep depreciation at around the 2% level by year's end.