CV Replacement / Spline Count
- Thread starter Bobs21x
- Start date
- Joined
- Sep 12, 2023
- Messages
- 1,369
- Location
- North Ridgeville, OH
- Vehicle Details
- 1997 Thunderbird 4.6, 1998 Mark VIII LSC
7.5" 28 spline.
Could it have had ABS? Weren't all ABS cars 8.8?
- Joined
- Sep 12, 2023
- Messages
- 1,369
- Location
- North Ridgeville, OH
- Vehicle Details
- 1997 Thunderbird 4.6, 1998 Mark VIII LSC
IIRC that applies only to the 89-92s, but it turns out I'm wrong! I've updated the rear end tech article. 
Last edited:
As far as I know, al N/A V6 cars got the 7.5" and only the V8 and SC cars got the 8.8" I don't think ABS/non-ABS factored into it.
MadMikeyL
Administrator
All ABS cars got the 8.8 diff because the 7.5 housing does not have the mounting provisions for the wheel speed sensors. However which diff you have is irrelevant to the axle. All were the same length and 28 spline count. The axles for the 3.8 were smaller diameter and weaker, so you wouldn’t necessarily want to put 3.8NA axles in a V8 or SC, but given that you have a 3.8, any MN12 or FN10 axle will work.
