Do '86 4x4 calipers clear width of V6 Landcruiser rotors?
10-28-2011, 08:53 AM
#1
Do '86 4x4 calipers clear width of V6 Landcruiser rotors?
I have an 85 solid axle 4x4 pickup that previous owner converted to IFS hubs and V6 Landcruiser brakes. I test drove the truck this morning for the first time in a while to find that the right caliper isn't grabbing and the truck is pulling to the left when braking = seized caliper 
I'd go in my garage and see for myself but I'm stuck at work and won't get home till late and leaving to go wheeling in the am... so I have 1 chance to either buy 2 new V6 Landcruiser calipers on my way home or put on some calipers left over from a '86 22r 4x4 pickup tonight. Will the 86 4x4 pickup calipers clear the width of the Landcruiser rotors?
I'm thinking Yes since the 86's came with vented rotors but I don't know if the v6 landcruiser rotors are wider than the 86 4x4 pickup calipers.
thanks in advance!
I'd go in my garage and see for myself but I'm stuck at work and won't get home till late and leaving to go wheeling in the am... so I have 1 chance to either buy 2 new V6 Landcruiser calipers on my way home or put on some calipers left over from a '86 22r 4x4 pickup tonight. Will the 86 4x4 pickup calipers clear the width of the Landcruiser rotors?
I'm thinking Yes since the 86's came with vented rotors but I don't know if the v6 landcruiser rotors are wider than the 86 4x4 pickup calipers.
thanks in advance!
10-28-2011, 09:43 AM
#3
Thanks, I just found something else online telling me they were slightly larger but it's even better to hear it from the expert 
Hope this will help anyone else wondering...
http://www.expeditionportal.com/foru...p/t-48607.html
Hope this will help anyone else wondering...
http://www.expeditionportal.com/foru...p/t-48607.html
The larger "V6" IFS calipers are way easier to find
It was only earlier IFS trucks from 1986-1988 that had different brakes for V6 and 4 cylinder, that's the big/big and big/small caliper and master cylinder piston difference. The early IFS caliper will have 'S12+8' in the casting and the 'S12' caliper is what came stock on solid axle mini trucks. Both the 'S12' and 'S12+8' have the asymmetrical sized pistons. The 'S12+8' has 43mm/34mm pistons, as does the 'S12' I believe.
The brakes seem to be the same on all 1989-1995 4WD pickups (4 cylinder or not) and 1989-1991 4Runner. Same 4 x 43mm pistons and finned 'S12W' castings, same 1" master cylinder, same dual diaphragm booster. My truck had a finned 'S12W' calipers and 1" master from the factory, just like V6 trucks. It's also possible that this was an XtraCab-only feature, but the window sticker on my truck made no mention of specially upsized brakes.
The 1992-1995 4Runner (V6 for sure at least) have bigger calipers and those are the same as what came on the T100. The rotor is slightly larger (11.375" in diameter for regular IFS vs. 11.41" for T100 and '92+ 4Runner) and thicker (about 5mm thicker, 0.79" vs. 0.985"). If you get '92+ 4Runner calipers you need to get the correct rotors to match. The casting on the T100 and 1992+ 4Runner is 'S13WB'. This will have 4 x 45mm pistons.
It was only earlier IFS trucks from 1986-1988 that had different brakes for V6 and 4 cylinder, that's the big/big and big/small caliper and master cylinder piston difference. The early IFS caliper will have 'S12+8' in the casting and the 'S12' caliper is what came stock on solid axle mini trucks. Both the 'S12' and 'S12+8' have the asymmetrical sized pistons. The 'S12+8' has 43mm/34mm pistons, as does the 'S12' I believe.
The brakes seem to be the same on all 1989-1995 4WD pickups (4 cylinder or not) and 1989-1991 4Runner. Same 4 x 43mm pistons and finned 'S12W' castings, same 1" master cylinder, same dual diaphragm booster. My truck had a finned 'S12W' calipers and 1" master from the factory, just like V6 trucks. It's also possible that this was an XtraCab-only feature, but the window sticker on my truck made no mention of specially upsized brakes.
The 1992-1995 4Runner (V6 for sure at least) have bigger calipers and those are the same as what came on the T100. The rotor is slightly larger (11.375" in diameter for regular IFS vs. 11.41" for T100 and '92+ 4Runner) and thicker (about 5mm thicker, 0.79" vs. 0.985"). If you get '92+ 4Runner calipers you need to get the correct rotors to match. The casting on the T100 and 1992+ 4Runner is 'S13WB'. This will have 4 x 45mm pistons.
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86-95 Trucks & 4Runners
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09-30-2015 05:51 PM
4runner, 4x4, 84, 86, caliper, calipers, calpier, conversion, forerunner, front, landcruiser, rotors, sticking, t100, width
