i know most will say its cheaper to just buy another tranny than to have a shop rebuild it for 600+, but what about rebuilding yourself? i got the time and patience, the main concern is the cost. i looked through the helms manual and it doesnt look too bad. at worst i was told its very tedious. im basically going for the most cost effective route since this is a project car and hence low priority. i figure a used ys1 goes for about 300 so hopefully rebuilding is substantially less.
what are the minimum parts/cost of required replacement items like seals etc?
what specialty tools do you need? i have all the basic stuff including dial calipers and other measurement tools.
can you mix and match good gears/synchros from other trannies? or is it best to buy new gears, if so does honda sell em and how much?
I rebuilt a tranny. Its pretty easy to do, but just make sure everything is up to spec. Getting the ring clips on/off is a hard thing to do also if you don’t have the tools (this will prevent you from mating the two cases together).
Just follow the helms manual (if you have a 92+ tranny). You might want to go to your local library and find the diagram for 90 or 91 trannies. They might be a little different since they have A1, S1 trannies.
you can mix/match tranny gears but depends on year.
any 91 or previous b series tranny will be interchangable. But most short geared trannies are JDM, which is hard to find parts for.
any 92 or newer tranny are interchangable. You shouldn’t have a problem with finding gears for them.
If you install a OEM LSD (i.e. ITR, CTR, GSR) you will need to do some case shaving to make them fit. I suggest just buying a qualife (sp) since those are better imo anyway.
If you have a nonvtec I personally would put GSR/ITR gears 1-4 and a 94+ hydro LS 5th gear. The FD from a LS too. Big jump from 4th to 5th tho.
I went to a tranny shop and bought aftermarket synchro’s and bought a non-OEM seal kit (there aren’t many seals). you can buy gears from www.acuraautomotiveparts.net or your dealer (might be cheaper)
You aren’t going to get new gear sets from your dealer cheaper than the price of a rebuilt tranny… I think the 3rd gear set is something like $500 USD? Maybe more? So if you had another tranny as a parts donor, it would help.
Also, if you phone your dealer, there should be some kind of transmission seal kit that would include all of the seals needed to rebuild your transmission. Not sure what it would cost.
thx for the info. ya i forgot about the 92+ part, i have a 90. the library has helms manuals?
from the haynes manual:
The tools necessary for an overhaul include internal and external snap-ring pliers, a bearing puller, a slide hammer, a set of pin punches, a dial indicator and possibly a hydraulic press. In addition, a large, sturdy workbench and ad vise or transmission/transaxle stand will be required.
from the helms:
mainshaft holder, mainshaft base, adj. bearing puller 25-40mm, driver 40mm i.d., pilots, and some other attachments and drivers
lets see from those i have the pliers, slide hammer (for bodywork tho?), dial indicator, and transmission jack. hopefully i can rent the others…
tranny work really isn’t that hard, I actually enjoyed it. I’ve pulled apart my a1 and my ys1. The directions in the 92 helms will work for the 90-91’s…except the clearances are probably different. But as far as directions go for dissassembly/assembly they are basically the same. the pre 91’s have a few less bolts on the outside, but its not really any issue, its all common sense.
You do not need any type of press like the manual says. Between the slide hammer, regular hammer, gear pullers, and some common sense you can take it all apart and put it back together.
The main thing I’d recommend is stay tidy. It would be very easy to mix parts up. I cleared my whole work bench, and laid down towels to cover it. Each time I took a new part off of the shaft i’d lay it down next to the previous part…and so on. I kept them all in order. This way I didn’t have to know what was what, I could just put it back in the reverse of how I took it off. This I think is really important because the pics in the helms aren’t that clear, and its sorta hard to see exactly what things look like, or what goes on top of what.
Rebuilding the tranny w/ oem parts is going to be EXTREMELY expensive. Assuming you’re replacing the synchros. I’m sure you know that you can’t buy just the synchros, you have to buy the whole gearset. Rio’s estimate is a bit high, I believe the 3rd gear set (w/ scott’s discount at south coast) is about $300…and remember, thats just 1 gearset. The gearsets are the most expensive parts. The seals and bearings really aren’t that pricy, and you can get away with reusing a lot of the old needle bearings. The input shaft bearing is pretty much manditory though, mine was shot!!
oh, one more thing…make sure the tranny is in 4th gear when you’re trying to get the tranny case back on.
http://www.ahmotor.com/ - bought my tranny hard parts here beat dealer by 20-40% depending on parts…if you want easy way to regear ys1 cable ls tranny just put final drive and counter shaft from cable gsr (4.400 VS. 4.266)…your ratios will then almost exactly match 94+ hydro gsr tranny…ends up cost alot less than 1-4 gears
Mr Toad,
Your idea of changing the final drive on an LS tranny is a good one, and a much cheaper alternative, but to insinuate you are a building a GSR similar geared LS’ is just incorrect. Changing the final drive will not solve the short comings of an LS, but it will help! For a real performance improvment, 2nd, 3rd and 4th gear should be replaced.
J.
what would i have to do to rebuild a JDM ys1 tranny that has a 3rd gear synchro problem? (i’d probably replace the 2nd synchro also… but what about JDM parts??
Well,
Unfortunately nothing in a D-series tranny will work in a YS1, but the syncros in a D-series will work in early B16 trannies. So, for all of those people that have ground out B16 trannies laying around and dont think that there is anywhere that they can get parts for them, D-series shit will work.
Now, as for the bad 3rd gear question, its basically 300 bucks worth of parts to fix. And, you should always buy a new mainshaft bearing when doing any replacement of this extent; not just the throw out bearing, but the cap bearing that the mainshaft spins off of on the casing. If 2nd gear is also bad in a tranny, your pretty much screwed. You’ll have to buy the main syncro/gear on the counter shaft side, another 300-400 bucks.
You can spend alot of money on trannies if your not careful.
J.
To add to J’s points, I would also replace the bearing at the base of the mainshaft that sits in the bell housing. I’ve seen more than a few of these go bad as well. When you have that bearing out, replace the mainshaft seal which sits in the bell housing just under the bearing above it. It keeps the tranny oil from leaking into your bell housing and onto the ground. Obviously, replace all aluminum washers and the axle seals. It does add up fast. Even with my discount at Acura I ended up paying close to $600 to rebuild my GSR YS1 transmission. Good luck.
Originally posted by XDEep
[B][B]YS1
JDM 92-93Integra RSi/XSi
US 92-93 GSR
Y1
JDM 89-91 civic/crx SiR
S1/J1
JDM 90-91Integra RSi/XSi
S1/YS1
US 90-93Integra RS/LS/GSSpec.Ed.
[/B]
looks like both 90-91 or 92-93 is ys1?
how can you tell if a ys1 is an ls or gsr?
so i guess ill be on the lookout for any broken ys1 or s80/y80 trannies to salvage from. ill stop by some shop dumpsters tomorrow [/B]
where’d you get that info? It doesn’t seem to be very good, at least its a bit confusing. First off, they should have separated out the 90-93 grouping. The ys1 was only 92-93. Also, the A1 tranny was also available in usdm rs/ls/gs tegs in 90-91 (or at least in 91) because thats what came in my car. I’ve found that a lot of the tranny info posted up out there on the net is a little bit off. They have the jist of it correct, but sometimes are off on the smaller details like these.
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