okay, so as many of you know my d16y8 transmissions like to destroy 3rd and 4th gears for no reason. im not making that much power and no one else seems to have any problems at all. ive shredded four 3rd gears and three 4th gears. two of them being racerstev heat treated gears. ive never broke one at the track. they have all broke on the hwy from slowly rolling into the gear. they break under power anywhere from 6000 to 8500 rpms. it has nothing to do with my 8 year honda mechanical skills because i have used stock unopened, untouched, low mileage trannies and still destroyed gears in them. and i dont see how it could have anything to do with my driving. i dont bang gears, i shift like a granny. and all of the gears that broke were from rolling into a gear on the highway.

now this is the 7th time i have had to pull the tranny and change out gears. i still have 3 more sets of spare 3rd gears and 3 sets of spare 4th gears left. sure, it doesnt cost me nothing besides $14 for fluid to keep swapping out gears and i could keep doing it until doomsday. but now the 7th one broke tonight and its starting to get a little old and frustrating.

are there any gear makers out there that can produce me a set of straight cut or semi-helical beefier gears maybe that would not break so easy? and would also have to be close to same stock ratios. 3rd = 1.250, 4th = 0.909
if anyone knows who can do this and how much approximately it would cost to make just a 3rd and 4th gear or if it even would be beneficial, let me know.

add one more 3rd gear to the pic because i just broke another one last night which i just replaced a couple weeks ago and driven on it like 3 times since then.





Modified by mike93eh2 at 8:31 PM 3/30/2008

 

45 views and no insight?

 

out of curiosity, what oil are you using?

Does the boost hit hard? thats a lot of broken gears.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Runnerdown &raquo;</TD></TR><TR><TD CLASS="quote">out of curiosity, what oil are you using?

Does the boost hit hard? thats a lot of broken gears.</TD></TR></TABLE>

ive tried the following oils:

-old honda mtf
-new honda mtf
-pennzoil snycromesh
-amsoil synthetic syncromesh

the oil has nothing to do with it. same oils everyone else uses. i dont know what you mean by boost hitting hard. its like any other 400hp d16 or other honda. it seems im breaking ALOT of gears with ALOT less hp than any other hondas breaking gears. as far as i know, i dont know of any other 400hp d16 guys that have ever broken any gears, i may be wrong..

 

Same question. What fluid ?

Also how much power is that car making ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dr. D-Series &raquo;</TD></TR><TR><TD CLASS="quote">Same question. What fluid ?

Also how much power is that car making ?</TD></TR></TABLE>

i posted at the same time as you, look above

just a 400hp d16 like everyone else and their mom who has one nowadays, nothing special.

 

did you try racersteve?

 

Pretty nuts.
Ill stick with sub 300's.
I dont need any broken gears. I have enough broken diffs lol.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">did you try racersteve?</TD></TR></TABLE>

yes

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote"> ive shredded four 3rd gears and three 4th gears. two of them being racerstev heat treated gears.</TD></TR></TABLE>


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dr. D-Series &raquo;</TD></TR><TR><TD CLASS="quote">Pretty nuts.
Ill stick with sub 300's.
I dont need any broken gears. I have enough broken diffs lol.</TD></TR></TABLE>

i wouldnt worry about it. there are a ton of 400hp d-series with no gear problems. just me. 1.63 sixty foots on 24.5" slicks and never broke anything. well my new PIC final drive i dont think i would be able to break.

 

How much does that car weigh ?

 

maybe its time to convert to a b series tranny, save yourself from replacing d series trannys over and over

 

I would try a thicker oil.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dr. D-Series &raquo;</TD></TR><TR><TD CLASS="quote">How much does that car weigh ?</TD></TR></TABLE>

about 2185 without me in it. 2 gears broke with just me in the car and 5 broke with a passenger.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wopsicle69 &raquo;</TD></TR><TR><TD CLASS="quote">maybe its time to convert to a b series tranny, save yourself from replacing d series trannys over and over</TD></TR></TABLE>

the cost of the b-series tranny versus a $50 tranny plus the cost of fabricating a D2B conversion which doesnt exist and all the time just doesnt seem worth it. id rather find my problem or remedy it to continue using the y8/z6 tranny. if i break a gear in the b-series tranny, im out alot of money. whats so different with the gears on a b-series vs. a d-series anyways?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Meat_Wagon &raquo;</TD></TR><TR><TD CLASS="quote">I would try a thicker oil.</TD></TR></TABLE>

what does the oil have to do with shredding the teeth clean off the gears? and why have i not had any problem with 1st, 2nd, 5th, and the ring gear?

thanks for the replies guys. anyone know who else makes gears besides mfactory or gear-x. i know there was one other place that could make custom gears for hondas but i cant remember the name. i know transzex knows..

 

I can't help but wonder if you have some form of resistance in the driveline that during long extended passes heats up and causes the gears to shread.

I also find it totally strange that you have NEVER broken a gear at the track, I mean wtf?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SovXietday &raquo;</TD></TR><TR><TD CLASS="quote">I can't help but wonder if you have some form of resistance in the driveline that during long extended passes heats up and causes the gears to shread.

I also find it totally strange that you have NEVER broken a gear at the track, I mean wtf?</TD></TR></TABLE>

and its only ever been 3rd and 4th... but i guess i am in those gears the longest out fo the rest of the gears.

im not in the gear that long.. a few seconds at the very most.. i mean i can look at my datalogs to get a exact number of how long im in that gear....

i have a transmission temp gauge. yes, i know thats wierd to have on a manual tranny lol. but i have no abnormal temps when racing or not racing. temps are actually quite low and stay close to the same whether im racing or not.

 

whats different between b-series gears and d-series gears? i have both sitting here and dont see any difference? why would a b-series transmission be any stronger than a d-series?

 

I've given this alot of thought, and I know it's not even my problem, but it's pissing me off.

I can't think of anything logical. All my theories end up with something else getting fucked up in the process or your gears wouldn't KEEP breaking.

I honestly can't think of anything that makes sense. I think putting stronger gears in is just a band-aid to the problem. There is a deeper problem here...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">I've given this alot of thought, and I know it's not even my problem, but it's pissing me off.

I can't think of anything logical. All my theories end up with something else getting fucked up in the process or your gears wouldn't KEEP breaking.

I honestly can't think of anything that makes sense. I think putting stronger gears in is just a band-aid to the problem. There is a deeper problem here...</TD></TR></TABLE>


youre telling me lol

yea, i know stronger gears would just be a band-aid..but its all i can come up with right now.

besides welding thick braces all around the tranny to possibly keep it from flexing and to keep the shafts from spreading apart ?? possibly the shafts are spreading apart under that high load and the gears spread apart to the outer tips of the teeth where it would be really weak and then from there it just explodes. who wants to make me a billet tranny case?

 

hows ur crankshaft endplay

 

I was thinking it could be super heavy clutch or throw-out bearing, but if the clutch was so bad as to push the gears, then the crank would get [freak]ed up like a DSM before a gear exploded.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">

besides welding thick braces all around the tranny to possibly keep it from flexing and to keep the shafts from spreading apart ?? possibly the shafts are spreading apart under that high load and the gears spread apart to the outer tips of the teeth where it would be really weak and then from there it just explodes. who wants to make me a billet tranny case? </TD></TR></TABLE>

Well, you already said you don't want a handcuff...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quicksilver1689 &raquo;</TD></TR><TR><TD CLASS="quote">hows ur crankshaft endplay</TD></TR></TABLE>

the engine was fully built by exospeed with no expense spared.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">I was thinking it could be super heavy clutch or throw-out bearing, but if the clutch was so bad as to push the gears, then the crank would get [freak]ed up like a DSM before a gear exploded.

Well, you already said you don't want a handcuff...</TD></TR></TABLE>

yea, same clutch everyone uses..

thats correct, i cant get rid of my 5th gear since its a street car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rota92 &raquo;</TD></TR><TR><TD CLASS="quote">How often do you cruise in 5th with your car?

I don't think it will ruin it for you, it's the only next step</TD></TR></TABLE>

anytime im on the highway...and im on the highway alot....because lol highways are everywhere.

and im at 4,000 rpms in 5th on the highway. i cant even imagine how slow id have to go on the hwy with no 5th gear.

 

The fact still remains that there are plenty of other people doing the same thing he is that are NOT breaking gears. We have to determine why his is different.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">The fact still remains that there are plenty of other people doing the same thing he is that are NOT breaking gears. We have to determine why his is different.
</TD></TR></TABLE>

that would be nice.. ive been researching everything under the sun on this and everyone elses setups for the past year and a half.

 

i guess my explanation would be to not boost in 3rd and 4th on the highway until you have a idea of what the problem is. other than that good luck finding the problem........