ohio

I need to replace the master cylinder in my 86 4R 22re (pedal slowly sinks to the floor at stoplights), and figured I'd upgrade to a larger bore as the braking has never been as strong as on my '92 pickup 22re. I looked up parts and this is what I came up with:

Aisin:
N3000-38193 8/92-10/95 V6 4Rs $133.29 (I think it's a 1" bore)
N3000-32062 pre-8/92 V6 and 4/89-7/92 4cyl 150.52 (I think a 1" bore, not sure how it differs from the above)
N3000-47560 8/84-3/89 4cyl 144.88 (13/16" bore)

NAPA reman:
TS 112017 13/16" bore (current) 41.49 after core
TS 112530 1" bore 48.99 after core

Normally I'd only go with Aisin and Denso parts, but the NAPA reman is pretty cheap, I know I'm getting the bigger bore, and a master cylinder is a pretty simple part.... What do you guys recommend? Have you had good luck with NAPA parts?

7m4x4dude

well i know like once or twice a month nap has a saterday sale, maybe a weekend sale. i think it's half off...

xxxtreme22r

So far my autozone brand new with reservoir made for a T-100 is holding up well. Put it to the test this past weekend.

Just be careful which one you get because the brake lines and/or reservoirs might not match up.

sb5walker

Keep in mind a larger bore will give you less mechanical leverage - it will push more fluid but you'll have to push the pedal harder to get the same amount of squeeze at your wheel cylinders. It's useful in cases where the pedal travels too far (with tight cylinders - you can't tell anything by a spent one).

Aisin are in a different class, so if you want them, wabfab and autohausaz are the two best sources I've found. rockauto carries beck/arnley, which are decent (but a step down). Napa usually has a good selection of new cylinders without reservoir for good prices.

myyota

I have a duel diapragm brake booster and master cylinder from a 92 4Runner on my 86 Runner, it was a nice improvement, and will be even better once i upgrade to vented rotors and V6 calipers.