Rear gear change vs changes to PCM?
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Rear gear change vs changes to PCM?
Hey guys,
I've been fine tuning my 54 Ford LS swap and I've got a major gear whine in my 9" Ford rear end cuz of a set of used 3.70 gears I installed & its loud enough on acceration @ 70mph its deafening so I want to get a new set and thought of going to a 3.50 gear in my LQ4/4L80e setup as well as lower the rpms a bit on the highway since with my 27.1" tire its at 2408rpms @ 70 now and according to a website it should be 2278rpms with a 3.50. Only bad thing is it'll hurt my 60' at the dragstrip
My only issue is my PCM is setup for a 3.70, I'm not worried about the speedo since it uses a programmable Autometer style (not tied into the PCM) but, will it affect the shift points, lock up etc?
Anything I will need to change?
I've been fine tuning my 54 Ford LS swap and I've got a major gear whine in my 9" Ford rear end cuz of a set of used 3.70 gears I installed & its loud enough on acceration @ 70mph its deafening so I want to get a new set and thought of going to a 3.50 gear in my LQ4/4L80e setup as well as lower the rpms a bit on the highway since with my 27.1" tire its at 2408rpms @ 70 now and according to a website it should be 2278rpms with a 3.50. Only bad thing is it'll hurt my 60' at the dragstrip
My only issue is my PCM is setup for a 3.70, I'm not worried about the speedo since it uses a programmable Autometer style (not tied into the PCM) but, will it affect the shift points, lock up etc?
Anything I will need to change?