More on gears...walk me through it...

[holptj]

Ok, I want to switch to 4.11 gear in the X, I have a grip on this part. I even found a garage that will do the work for a reasonable price.

Now, I want to take the old gear set from the X and put it in my other car. But, here is where I need some explanation. My CV has an 8.8 rear (2.73 gears), but it uses the 28 spline gear instead of the 31 spline. I read in one recent post on this topic that this means I would have to change out the axels.

I thought that the spline count refered to the number of teeth on the end going to the drive shart - so all I would need is a flange. Is this wrong thinking? If so, what does the count refer to?

What, if anything, needs to be changed to make this work.

Big thanks for any clarification.

 

[FMExplorer]

What kind of car are you putting these in and what ratio are they?

As far as the spline count goes - that refers to the teeth at the end of the spline where it inserts into the carrier - ratio will not affect axles in that way at all.

You will need an install kit - complete with shims, bearings and crush sleeve to swap out correctly - about $100.

Jon

 

[94EBexplorer]

i think you mean 4:10 gears and 3:73.

 

[410Fortune]

I'm just guessing here but your car is a Mustang right?

 

[holptj]

Good questions - at least my confusion is getting narrowed down at bit. The car I want to put the old X gears in is a '90 CV (Crown Victoria) with - yes - 2.73 gears. In '90 the 5.0s had 3.08 or 3.27 and the 5.8s had 2.73. I happen to have the 5.8 Now you know why I want to swap in the 3.73 once they come out of the X.

But I am still confused. I thought the X had 31 splines and I am told that the CV rear is 28 spline. Will if work? What other parts/mods will it need?

Thanks for the responses.

 

[FMExplorer]

You can swap the gears in. but 3.73's with a 351 will give you huge torque. The 3.73's should work along with your existing carrier in the CV. The spline-count has nothing to do with the gears - only the carrier that the gears are attached to.

Email me if you have any other questions...

Jon

 

[holptj]

Thanks Jon, that was the big answer I was looking for. I'll take you up on your offer and email you if I get it straight enough in my head to ask a few good questions.

Tim