gt_orange

Does anyone know if the abs pump will interchange? Both have traction control. Also I have 3:55's from a mach 1 laying around, are they worth the time swapping into a gt with factory 3:27's. Anyone need 99-04 parts let me know.

jdmeaux1952

Go to www.RockAuto.com and do some research on the P/N for the abs pumps. I think they are the same.

As long as both are using the Ford 8.8" rear-end, the 3.55 should transfer over. Just make sure you get the pinion installation kit, and TAKE YOUR TIME to check the run-out.

gt_orange

I know my 3:55s will work and are from a 8.8 . I just wonder if it was worth the time.

jdmeaux1952

Depends who you talk to. Most magazines say that anything below 3.73 isn't worth it. A lot of street racers also say 3.73 or 4.10.

It depends on the power curve of your engine. If you want to get into the power band quickly (like in racing), then go for the lower gears (4.10 or higher). But don't forget that while you will get into the higher RPMs of the engine quickly, you also shorten the time period you can be in those rpms.