Gearbox upgrade

[Airthies]

Sorry to hijack your thread. My 2003 2.4 90 RWD is extremely slow and she struggles to get past 60mph. How do you find out what size of diff you have?

I am looking into other reasons why she is so slow ie inlet manifold, blocked intercooler, faulty injectors etc. I have always wondered if I just have a really small rear diff, but even with an empty 12' trailer, she struggles to pull away.

Any help would be greatly appreciated.

If it's still original then it'll be listed on etis https://www.etis.ford.com/vehicleRegSelector.do

Or add yr reg/vin here viewtopic.php?f=5&t=37058&start=7575

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