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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

factory rear drums/back plates variations

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Old 11-27-2016, 05:29 PM   #1
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factory rear drums/back plates variations

Hi, my 1985 1/2 pickup needs complete rear end rebuild. ive looked at some parts source and there seems to be a lot of variation for the same year.

its 4x4 with IFS.

i went to local part source and the guy showed me some drums he has in stock and they are smaller in diameter....

any idea what i should look for ?

thanks
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Old 11-28-2016, 01:04 AM   #2
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Just where are you coming up with 85 1/2 just what is the production date ??



It all depends what your going to do.

Are you getting another complete axle to rebuild ??

Planning to rebuild what you have.??

The only real thing you can do is measure and take pictures of what you have .

For 86 it looks like 3 different size brakes 1 For the 1 ton dual wheels
1 for the 6 lug 4x4 and 1 for the 5 lug 2wd from a quick look

The thing is there is no telling just what axle may have been swapped into your truck unless you owned it from new.
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Old 11-28-2016, 03:56 AM   #3
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If it has IFS it's an 86 or later. There is no half year. There were no 85 IFS trucks. Just because the date of manufacture is in 85 doesn't mean it's an 85 model year. Just like you can already buy 2017 cars and 2016 isn't over yet.
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Old 11-28-2016, 03:59 AM   #4
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You can use your VIN to determine what model year your truck is. You can measure the ID of your brake drums to determine what brakes you have. A ruler or measuring tape will do fine. Most parts listings will specify the drum diameter.
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Old 11-28-2016, 05:15 AM   #5
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thanks for the reply

its a IFS, EFI. 4x4
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Old 11-28-2016, 02:52 PM   #6
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since it's ifs, there is some sort of a title problem or something there, but it won't change the troubleshooting procedure.

take a drum, a slave cylinder, and the shoes down to the local flaps, see if they can match it.
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Old 11-28-2016, 05:12 PM   #7
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i am not trying to invent a title, its build date is october 1985, bought it from original first owner, sold here in my local town. never ever got modified as i was the one who was working on it while it was almost new.

local dealer always told me its a 1985 1/2
maybe its just a 86 after all, does that realy matters ?

22rec, ifs, 4x4 with an automatic+overdrive a340H

local parts store is realy not a reference to tell what should or should not go there, as the reason i am asking you guys.

thanks.
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Old 11-29-2016, 01:19 AM   #8
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Cant answer the question on drums, but if you have to replace Slave Cylinders, make sure you get the correct ones. Toyota used different Slave Cylinders from 84-88. The wrong one will bolt up but the pistons are shorter and can pop out of the housing and blow all of your brake fluid resulting in No Brakes.
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Old 11-29-2016, 09:05 AM   #9
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Quote:
Originally Posted by patallen View Post

local parts store is realy not a reference to tell what should or should not go there, as the reason i am asking you guys.

thanks.
"take a drum, a slave cylinder, and the shoes down to the local flaps, see if they can match it."
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Old 11-29-2016, 12:10 PM   #10
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Being he is from that foreign country in Canada who can say what kind of different registration they might have

In the USA September is when you start to see the next year production .

As it was built in the later part of 85 and has the IFS suspension I can see where the 85 1/2 comes from being a change over year.

Like I said your best bet is to measure what you have.



As many measurements as you can take we can figure out what you need.
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Old 12-07-2016, 07:34 AM   #11
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If its IFS 4x4 then you have the wider rear axle with bigger drum brakes. Your going in asking for brake parts for an 85 then your getting the smaller drums that came on straight axle vehicles. Just ask for 86 equipment from here on and you shouldn't have a problem.
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Old 12-07-2016, 11:28 AM   #12
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local dealer always told me its a 1985 1/2
maybe its just a 86 after all, does that realy matters ?

22rec, ifs, 4x4 with an automatic+overdrive a340H

local parts store is realy not a reference to tell what should or should not go there, as the reason i am asking you guys.

thanks.[/QUOTE]
Yes it matters, 1985 and earlier 4x4 trucks had a smaller rear axle, approx. 3 inches shorter than the rear axle on IFS 4x4 trucks from 1986 to 1995. The early straight axle trucks also had smaller drum brakes. I believe you have a 85 1/2 truck but technically speaking its a 86.
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