negcamber

Axles are the same part number for AP1 & AP2...no difference.

1320performancefreak

okay i guess the axles i have for ap2 will work on my ap1 then. what work do i need to swap the ap2 complete diff on to my ap1?

jyeung528

how is the drive shaft different?

fltsfshr

It has the other flanges on it and is a little different diameter. I don't it weighs the same either.

At least that's what I thought I noticed when I switched out.

jyeung528

^
thanks.

what are the alleged improvements over ap1...

i want to do a quick benefits to cost analysis and determine whether I want to do this upgrade...

fltsfshr

In an ap2 tranny the secondary reduction gear is 1.6 compared to 1.25 in an ap1.

both 5th and 6th gear are a little higher 1 thru 4 ratios remain the same.

Ive been told it will feel like you installed a set of 444's in an ap1

fltsfshr

jyeung528

^
i should've been more clear...

i understand the ap2 transmission ratios, what i meant was the alleged improvements of upgrading to the ap2 driveshaft....

fltsfshr

I'm assuming that some of it has to do with protecting the differential a bit more. I don't know for sure. Other than a tempering change in the differential housing, they are identical.

I don't think the change is enough to make a rotational weight difference of any consequence.

I'm not sure about honda prop shafts but many drive shafts are balanced to the differential and marked accordingly (sometimes with yellow chaulk)


fltsfshr

inactiveuser1114

so do AP2 need spacers yes or no?