10 speed with a 3.70 or 3.90?

[Volvo8873]

(08-20-2018 )Redland1 Wrote:  

(08-20-2018 )Volvo8873 Wrote:  3.90 no doubt. Mack MP8 is just a Volvo D13 engine rebadged.

Thanks.
And as far as motor issues? I have heard injector cups.Anything else?

Yup same problems as a D13. Know that the injector cups are sensitive to anything on those engines but when it does happen I can almost guarantee that 9/10 mechanics slap those cups in the motor and sing koombya, eat cheese, or whatever. I have done 5 sets now in the d12 engines which are simlar and is a VERY critical task. I don’t know of anyone that can decently tune them though and if you do let us know.