Originally Posted by
The Youth.
Mark quick question for you if I may, For my race car I have a 7" 3.9 rear diff and std 3.6 front diff, I have bought some alledgedly 3.9 drop gears and chain, they are a lot smaller cogs and chain length than thr original but can you tell me how many teeth each should have please?
I will count them tommorrow and post up how many mine have
I just want to confirm they are the right ones before putting them in the car!
cheers
steve
The two things you have to consider for the step off is the required ratio change and to keep the drop chain tight, not all gear combination will support the chain tension correctly.
Iirc 28/26 is the right gears for 3.9, count them and let me know, I will tell you if they are for 3.9 std is 31/31