Which speedo gear??

[Dan B.]

I swapped from airplane gears to 3.55's in my 8.8". Which gear do I need to correct the speedo error?

[349Stroker]

prolly just one more tooth than what you have. I'd say 19 or 20 tooth

[95riosnake]

When I did 3.55's in my car, I had to use a White 23 tooth speedo gear, that's with a T5 trans, it may be different with an AOD.

[Dan B.]

It must be different. I took the gear from the T5 that was in the Turbo Couple the 3.55 rear came from and it's off by 15mph.

[SK@StreetLethal]

I found a calculator that said 21 tooth.