soupcan76
New Member
- Joined
- Oct 23, 2013
- Messages
- 4
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1990
- Make / Model
- Ford
- Engine Size
- 4.0 OHV
- Transmission
- Automatic
First post and its a question that I am sure you guys are tired of answering. I bought the truck 2 years ago it is a 1990 supercab 4x4 with a 3" body lift . Stock tire size was 215/75/15 I am not a wheeler mostly highway , but I do work on a farm so 4wd gets used often. I searched and found info on gearing to 4.10 or 4.56 for 31's but my question is am I beating my transmission (A4ld) and engine(4.0L OHV) to death running 31's with a 3.55 rear end ? I ask because it is time to replace the tires that came with the truck they are 31's. I would really like to stick with the bigger tires as I like the look but if it comes to my wallet smaller tires are cheaper than re gearing at this point. The transmission has a large aftermarket cooler installed and I don't feel it lacks power it's a truck, I have a ford P71 if I want to drag race lol. I just want to know if I am gonna cause undo wear on the engine and transmission. So finally the question stick with 31's or go back to stock size, well okay I wont go that small 235/75/15 ?