Big Brake kit for ‘86 Trooper
1 - 6 of 6 Posts
It may fit, but with a caveat!
I checked on Rockauto and early '86 calipers don't cross-match over to '88-'91 front calipers. However, looks like a Trooper manufactured from 11/86 would have the same calipers. And if that's the case, I don't see why it wouldn't upgrade.
You might want to look up specs on the rotors. Other than the Gen II rotors being of larger outer diameter, the fitment (offset, rotor thickness, center hole i.d., bolt pattern) would be the same.
So check your driver's door tag, I think that's where the build date lives.
If so, you can query on "Big Brake" or "Big Brake Mod" and there will be a lot of threads. Basically you need calipers and rotors from a Gen II Trooper '92-'98 or so. IIRC '93-'98 Rodeo will work as well. You'll probably need different brake hoses because the newer calipers have the hoses attach at a different angle. Rodeo hoses seem to work but you'll probably have to experiment.
If you're junkyard crawling, be sure to grab a set of the inner brake sheet metal dust shields, they are hard to find and not cheap new. Or you're gonna have to cut up your existing dust shields to make 'em fit the larger-diameter rotors, and they probably won't be purty! The later-style dust shields just bolt right in and fit & look as they should.
HTH.......ed
I checked on Rockauto and early '86 calipers don't cross-match over to '88-'91 front calipers. However, looks like a Trooper manufactured from 11/86 would have the same calipers. And if that's the case, I don't see why it wouldn't upgrade.
You might want to look up specs on the rotors. Other than the Gen II rotors being of larger outer diameter, the fitment (offset, rotor thickness, center hole i.d., bolt pattern) would be the same.
So check your driver's door tag, I think that's where the build date lives.
If so, you can query on "Big Brake" or "Big Brake Mod" and there will be a lot of threads. Basically you need calipers and rotors from a Gen II Trooper '92-'98 or so. IIRC '93-'98 Rodeo will work as well. You'll probably need different brake hoses because the newer calipers have the hoses attach at a different angle. Rodeo hoses seem to work but you'll probably have to experiment.
If you're junkyard crawling, be sure to grab a set of the inner brake sheet metal dust shields, they are hard to find and not cheap new. Or you're gonna have to cut up your existing dust shields to make 'em fit the larger-diameter rotors, and they probably won't be purty! The later-style dust shields just bolt right in and fit & look as they should.
HTH.......ed
Joined
·
1,576 Posts
It is my understanding that they changed the hub setup in 11/86, so the hubs prior to that date will not accept the rotors after that date. I think the bolt pattern and bore on the rotors is what changed (in addition to the OD). The best brake upgrade you can do is get rid of the cruddy rear drums by swapping in a 88-91 Trooper 12 bolt rear (they are all disc rears).
Joined
·
8 Posts
I am going to guess that the 11/86 is when they switched to the 87? If so the 87 is more like the 88+ than an 86.
Joined
·
1,576 Posts
I honestly don’t know — 11/86 to 9/88 is a grey area. All 9/88+ use the same interchangeable setup. The - 11/86 use the old LUV truck setup… as with all troopers parts, 87 is a parts bin year and in this case late 86. I believe the 87 troopers use the aisin auto hubs like the older trucks which indicates the rotors and hubs are the ‘old style’ but with the new style calipers
We had an 87 LS and it had the newer style auto locking hubs.
1 - 6 of 6 Posts
