if i drop a normal civic tranny in my si how will it affect my speed and performance?

 

depends on what tranny you put back in HF, DX EX, Si or ZC, each one affects speed in different ways. HF is slower accel. than a Si

 

i was thinkin of maybe a cx or crx tranny

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91_civic_si_guy &raquo;</TD></TR><TR><TD CLASS="quote">i was thinkin of maybe a cx or crx tranny</TD></TR></TABLE>

CX tranny - longer gearing so it will be slower.

Crx trany - which one? Another Si one will be the same tranny (and same gear ratios) you are dropping out. Ame thing.

 

just a normal 88 crx tranny

 

if you drop in the si transmission , you will accelerate faster and you will burn more gas since it has shorter gears.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91_civic_si_guy &raquo;</TD></TR><TR><TD CLASS="quote">just a normal 88 crx tranny</TD></TR></TABLE> normal? dx ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91_civic_si_guy &raquo;</TD></TR><TR><TD CLASS="quote">just a normal 88 crx tranny</TD></TR></TABLE>

Okay, you're just not getting it. There IS no "normal" CRX tranny. There's not one default transmission that they put into every CRX unless a different one was ordered by the buyer. The Si transmission is one CRX transmission, the HF one is another, and the DX one is a third - and that just covers the US models!

Let's just suffice it to say that if you drop a CRX tranny into your Si, and it's NOT an Si tranny or an imported JDM tranny, it will be slower.

Mike

 

so would i just be better off getting the old si tranny rebuilt

 

buy another one, it cost less to buy another than rebuild i think

 

but if i buy another one then how do you know how good it is

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX_Control &raquo;</TD></TR><TR><TD CLASS="quote">buy another one, it cost less to buy another than rebuild i think</TD></TR></TABLE>

True, unless you end up needing a rebuild on the "new" one. Let's face it, there AREN'T very many low-mileage transmissions around that'll drop right in. Even the "low mileage" JDM ones you see for sale typically have more like 60,000 miles on them than the 30,000 most importers would like you to believe. And buying anything sight-unseen and without being able to try it out first can be a little... disappointing. We've all heard the stories: "like new; no grinds; shifts great," only it turns out that there was a very good reason the seller wanted to get rid of it.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91_civic_si_guy &raquo;</TD></TR><TR><TD CLASS="quote">but if i buy another one then how do you know how good it is</TD></TR></TABLE>

You don't. At best, you get lucky and get a good one that hasn't been abused. At worst, you get one that's completely trashed and is all but useless. You pay your money and you take your chances. There are things to look for, but unless you actually get to drive the car that the transmission you're getting is coming out of, you don't KNOW if it's good or not.

I've dealt with enough L3 ('88-'91 D-series) transmissions that I hesitate to slap a used one in any of my cars without opening it up first and having a good look inside - and that's not a far leap from going ahead and putting a rebuild kit in it. For the amount of work you're committing to when you decide to swap out your transmission, wouldn't you want to KNOW that you're installing a good one, or at least a better one than you've got, and that you're not going to have to yank it right back out because it wasn't what you hoped it was?

A good rebuild kit will replace all the bearings, synchros, and seals in the transmission; if your shift forks and the gearsets themselves are in good shape, you basically end up with a like-new (not new) transmission, for about the cost of an unkown used transmission.

Still, though, you need to do some research, find out EXACTLY what you want, what will fit, and so on. All D-series transmissions are not the same; there IS no such thing as "just a normal Civic or CRX transmission". Every model tends to have its own transmission application, and imported transmissions open up even more possibilities. And there are differences in some of them from one year to the next. It's not hard to find something with better gear ratios than most, but if you're not specific, it's real easy to get one with really crappy ratios that will leave your car feeling as if it were sick.

Asking for "just a normal transmission" is like asking for "just a normal engine" - there are tons of them that will fit, but they are definitely not all the same.

Mike

 

k.. well ill help him out, the "normal" crx tranny is a dx.. its out of a 90 crx dx.

and basically, like everyone else has told you.. theres no way to tell if the tranny is gonna be good or not without trying it.. thats why I'm just gonna spend the money to get the Si rebuilt.. so that I'll know itll be good.. but the crx tranny, as far as i know was okay.. didnt drive it far, but it seemed to shift fine from what i remember.