Use CK-TLC-B for "4 cyl” type differential
You have 30 spline shafts. All toyota 8" differentials are 30 spline. Just be sure you get the one for a 4cyl diff since that is what you have.
On the LC Engineering page it says,
All pre-'95 4-cylinder 4wd mini-trucks & 4Runners use the Toyota 8" 2-pinion differential front and rear (except turbo models). This is known as the "4cyl diff." This diff is by far the most common diff in older Toyotas.
- Ten 10mm ring gear bolts
- 27 spline pinion
- 2-pinion carrier (case)
- V6 carriers can be used in this diff if the correct bearings are used
** 4cyl diffs are swappable with the V6 and high pinion diffs.https://www.lcengineering.com/LCTechPages/DIFFERENTIALTOYOTATECH.html
But I am seeing all over that they're 27 spline or no they're 30 spline or they're 30 spline in the rear and 27 up front. All so confusing.