1998 Acura RL Coolant leak and differential leak, pinion ga

I have Chilton labor guide.
I can give how long it shoult take to do each repair you mentioned, but the problem is that each state, each town and each business, have their own price/ hour.
Ask the shop how much they charge per hours. I know sometime it is not on the receipts.
Her it is:
thermostat replace: time :1.2
Radiator hoses, uper and lower : time : 1.3
pinion shaft oil seal: 6.70
I think that price you pay for the labor is fair.
Because they are cheeper than me according to my state :-)

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