2014 Challenger RT shaker so 5.7 w/auto . Mods long tube headers, hiflow cats, cam, and torque converter 2400 rpm. Came with the 306 rear can I just change out ring and pinion or do I have to get whole assembly? Want to get my 60ft time a little faster. I do drive car on road trips.
The whole thing needs to be changed, The diff itself, axles and hubs. The open diff has smaller axles, check with Speed Logix they usually have a package you can purchase for a reasonable price. Up here in Canada with shipping and the dollar exchange it is close to $2800.00
Not what I was hoping for. This will have to wait awhile. I spent quite a bit on my other mods and just bought a lift for my shop.
Yes sir that would be a good upgrade and I concur you’d waste your money just getting a gear ring swap..