I was wondering if the HF transmission has the strength of the other D series transmissions. I wonder because I want to put down forced induction numbers and still be able to hook up....and go rediculously quick on the highway, and get good gas mileage.

 

It will do it, But you might not like the ratios.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ogabudiah &raquo;</TD></TR><TR><TD CLASS="quote">It will do it, But you might not like the ratios.</TD></TR></TABLE>

let me rephrase that statement for him...you WILL NOT like the ratio's for performance and acceleration. the HF trans has a 2.95 final drive. im doing a swap right now in my automatic 89 dx hatch. im putting in the HF trans becuase i want to get hella mileage but im definatly not looking for performance. just some opinions.

 

HF tranny is geared for FUEL ECONOMY not PERFORAMNCE get a SI or ZC or if you have to at the very leaste gat a DX tranny

DO NOT USE THE HF TRANNY. WHY THE HELL WOULD YOU WANT TO BOOST THE HF MOTOR AND TRANNY ANYWAY? Get a d16a6 CRX SI motor and boost that at leaste that motor has more than 62 hp

 

[QUOTE=japrex]

let me rephrase that statement for him...you WILL NOT like the ratio's for performance and acceleration. the HF trans has a 2.95 final drive. QUOTE]

the HF transmission does not have a 2.95 final drive - the final drive on HF is 3.77 - i have rebuilt many of these transmissions and have counted the teeth on the gears and they are 3.77

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">the HF transmission does not have a 2.95 final drive - the final drive on HF is 3.77 - i have rebuilt many of these transmissions and have counted the teeth on the gears and they are 3.77</TD></TR></TABLE>


somehow you're getting confused.

it's 2.95

 

The HF and DX cases use smaller bearings throughout, and will not support as much load as the EX/Si trans.

Why bother anyway. I still get 34mpg on the freeway in my EG, with an Si trans. Theoretical top speed of 152mph is good enough for me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drussell4801 &raquo;</TD></TR><TR><TD CLASS="quote">


somehow you're getting confused.

it's 2.95 </TD></TR></TABLE>
don't believe everything you read on the internet - count the teeth on one yourself - i have, on many - 18 teeth on countershaft and 68 teeth on ring gear

 

I'm glad there is one person who actually reads the question before answering it. Thanks for the gear ratio lesson guys but I know that. It makes me mad that any of you assume you know what I will and will not like all I wanted to know was the power handling characteristics of the transmission and no I'm not boosting the HF motor and it's impossible to boost a tranny but thanks for your useless input. You guys every heard of a 2 speed? 8,7,6 seconds isn't quick enough for you? I bet those don't use 4.11 final drives.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">
don't believe everything you read on the internet - count the teeth on one yourself - i have, on many - 18 teeth on countershaft and 68 teeth on ring gear</TD></TR></TABLE>

find a honda shop manual for one.




Modified by drussell4801 at 2:26 AM 11/8/2004

 

i found your 3.77, and it does exist, but not on the hf.

https://honda-tech.com/zerothread?id=461434

looks like the 3.77 you're thinking of is from the '88 civic hatch dx and the '88 crx dx.

edit: it says 3.72 on there..

 

Whatever hookup you achieve through the bigger final drive of the HF will quickly be pummeled down by a superior transmission with lesser power driving it. The long geared transmission will drop you near the bottom of your power band shifting from 1st, 2nd and 3rd. If you don't have sufficient torque to move 4th and 5th do not bother using them. Performance and fuel efficiency don't go hand in hand.

If your still bent on using the HF transmission you won't find much information on it. Although we are an technical site, we tend to lean towards being performance oriented and the HF just doesn't fit. However, given the D series transmissions that I've seen parts begin to fail in the 200-300hp. This is not a rule of thumb, depending on how you drive you can break your transmission just as easily with 100hp as with 300hp.

Do more research.

 

si/zc tranny with hf 5th

performance + highway milage

If you don't know how to DIY, though, a transmission shop will charge you in and out a in the *** for the job.

Also be aware that 5th gear will be useless for acceleration and only good for cruising... you'll find yourself downshifting often to 4th.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A_Viglakis &raquo;</TD></TR><TR><TD CLASS="quote">I was wondering if the HF transmission has the strength of the other D series transmissions. I wonder because I want to put down forced induction numbers and still be able to hook up....and go rediculously quick on the highway, and get good gas mileage.</TD></TR></TABLE>

You won't be able to put down 'FI numbers' with an HF tranny. 'FI numbers' relate to the acceleration of the car, and the HF tranny will not get you accelerating like even a DX tranny would. By 'rediculously quick on the highway,' I hope you mean taking 3 to 4 miles on a flat or downward incline to reach a rediculously high velocity, but having rediculously hideous acceleration and almost no power to climb even the slightest hills with.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">
don't believe everything you read on the internet - count the teeth on one yourself - i have, on many - 18 teeth on countershaft and 68 teeth on ring gear</TD></TR></TABLE>

Exactly. There are two versions. In CA we have the 3.25:1, with a 20 tooth countershaft and 65 tooth ring gear.

A 20 tooth countershaft with a 68 tooth ring gear would not fit without altering the bearing locations within the tranny case. As far as I know, all of the tranny cases are the same, with larger bearings in the EX and Si cases.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim Truett &raquo;</TD></TR><TR><TD CLASS="quote">

Exactly. There are two versions. In CA we have the 3.25:1, with a 20 tooth countershaft and 65 tooth ring gear.

A 20 tooth countershaft with a 68 tooth ring gear would not fit without altering the bearing locations within the tranny case. As far as I know, all of the tranny cases are the same, with larger bearings in the EX and Si cases.</TD></TR></TABLE>

all of the HF's that i have worked on have 18 teeth on countershaft a 68 teeth on the ring gear (3.777 Final Drive) - they were not CA, as far as i know - the 68 tooth ring gear does fit the case - Si has 68 tooth ring gear with 16 teeth on the countershaft - we have a 4.4375 final drive in our ZC hybrid transmission which has 16 teeth on the countershaft and 71 teeth on the ring gear - stock DX and ZC have 18 teeth on the countershaft and 70 teeth on the ring gear

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">

all of the HF's that i have worked on have 18 teeth on countershaft a 68 teeth on the ring gear (3.777 Final Drive) - they were not CA, as far as i know - the 68 tooth ring gear does fit the case - Si has 68 tooth ring gear with 16 teeth on the countershaft - we have a 4.4375 final drive in our ZC hybrid transmission which has 16 teeth on the countershaft and 71 teeth on the ring gear - stock DX and ZC have 18 teeth on the countershaft and 70 teeth on the ring gear</TD></TR></TABLE>


I have three transmissions torn apart in my garage.

1. '91 HF CA model: 20 tooth counter, 65 tooth ring. 3.25:1 FD

2. '91 Si: 16 tooth counter, 68 tooth ring. 4.25:1 FD

3. '91 DX: 18 tooth counter, 70 tooth ring. 3.88 FD

I did pull these from the vehicles myself.

One of many specification pages: http://members.lycos.nl/hendrik/honda.htm

What's the deal? Are these Cali only ratios?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim Truett &raquo;</TD></TR><TR><TD CLASS="quote">


I have three transmissions torn apart in my garage.

1. '91 HF CA model: 20 tooth counter, 65 tooth ring. 3.25:1 FD

2. '91 Si: 16 tooth counter, 68 tooth ring. 4.25:1 FD

3. '91 DX: 18 tooth counter, 70 tooth ring. 3.88 FD

I did pull these from the vehicles myself.

One of many specification pages: http://members.lycos.nl/hendrik/honda.htm

What's the deal? Are these Cali only ratios?</TD></TR></TABLE>
can't open the link? the ratios you have are what we have, except for your CA HF - i have worked on and rebuilt dozens of the L3's - all years and all models, many HF's, and here in CO they are all 18/68 = 3.77

 

i guess at this point lets just stop worrying about it.

hf sucks ***** either way, lets agree on that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A_Viglakis &raquo;</TD></TR><TR><TD CLASS="quote">I was wondering if the HF transmission has the strength of the other D series transmissions. I wonder because I want to put down forced induction numbers and still be able to hook up....and go rediculously quick on the highway, and get good gas mileage.</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A_Viglakis &raquo;</TD></TR><TR><TD CLASS="quote">I'm glad there is one person who actually reads the question before answering it. Thanks for the gear ratio lesson guys but I know that. It makes me mad that any of you assume you know what I will and will not like all I wanted to know was the power handling characteristics of the transmission and no I'm not boosting the HF motor and it's impossible to boost a tranny but thanks for your useless input. You guys every heard of a 2 speed? 8,7,6 seconds isn't quick enough for you? I bet those don't use 4.11 final drives.</TD></TR></TABLE>
You really must be brain-dead.

Long gears = less torque to the ground = slower acceleration. Longer gears may be beneficial when tire grip has already been maximized and the car is still having severe traction problems, and I highly doubt you're at this stage. Even the Si transmission's gearing is still too long for most performance applications (Read: NOT DAILY DRIVING, OR HIGHWAY FUEL ECONOMY).

And I highly doubt anyone asking such a stupid question about the HF transmission is going to be running "8,7,6 seconds." Comparing a purpose-built drag car to a street car is just lunacy. If you were running that fast, you'd already know the answers.

"Go rediculously quick on the highway"? Yeah, you're definitely a moron.

We're sorry we're not catering to your silly idea, and making you feel good. Life is tough. Get with the program.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A_Viglakis &raquo;</TD></TR><TR><TD CLASS="quote">I'm glad there is one person who actually reads the question before answering it. Thanks for the gear ratio lesson guys but I know that. It makes me mad that any of you assume you know what I will and will not like all I wanted to know was the power handling characteristics of the transmission and no I'm not boosting the HF motor and it's impossible to boost a tranny but thanks for your useless input. You guys every heard of a 2 speed? 8,7,6 seconds isn't quick enough for you? I bet those don't use 4.11 final drives.</TD></TR></TABLE>

all this attitude coming from you, and you have no idea what you're talking about.

seriously, shut your mouth and learn something.

 

i want to respond but don't want to perpetuate this thread, to all those who are angry try re-reading what I said I really don't think many of you understood.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A_Viglakis &raquo;</TD></TR><TR><TD CLASS="quote">i want to respond but don't want to perpetuate this thread, to all those who are angry try re-reading what I said I really don't think many of you understood.</TD></TR></TABLE>

nobody's angry man, we just think you should do a little less talking and a bit more learning.. also, if you didn't get what you wanted from this thread, don't expect to get much later on from anyone you just acted like a dick to. I know I certainly won't help you if you need it.

I'm sure you think you know the answer, so just do it your way and go from there. When you start losing races you can defend yourself by telling people you get 45 mpg.

 

all i asked about was power handling characteristics, you guys took it from there

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A_Viglakis &raquo;</TD></TR><TR><TD CLASS="quote">all i asked about was power handling characteristics, you guys took it from there</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by A_Viglakis &raquo;</TD></TR><TR><TD CLASS="quote">I was wondering if the HF transmission has the strength of the other D series transmissions. I wonder because I want to put down forced induction numbers and still be able to hook up....and go rediculously quick on the highway, and get good gas mileage.</TD></TR></TABLE>

looks like you did more than just ask about power handling.

you made some incorrect statements and assumptions, and we tried to help you out with it. Then you made some even stupider comments and then got defensive.

if you want info fine, stay on honda-tech; but if you want to just make incorrect assumptions and stick by them no matter what, go away.