Honda p20 transmission problem. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

DS562 · 03-29-2013, 02:51 PM

Sorry for this, but I'm stumped. I just rebuilt a honda P20 manual transmission from a D series engine. I rebuilt it correctly, made sure all gears engaged and disengaged properly and were all aligned and spun in order when the input shaft was rotated. But that isn't an issue, now the car will not turn on. The flywheel will not turn when I try and start the car. Starter and the solenoid are fine but they can't turn the flywheel. It's almost as if the crankshaft is seized but I can turn it 1/4 if I use a socket and breaker bar on the front main lug. The wheels also spin freely in all gears when on jack stands but, when the car is on the ground, I can't push the damn thing at all. Any ideas?

foreverdeath · 03-29-2013, 03:39 PM

what you you hear when you turn the key? a clunk, spining with no engage, tooth grinding.... honda FWD transmissions are so easy to rebuild.

di-devol · 03-29-2013, 03:40 PM

You can't turn the motor over more than 1/4 turn? That's a red flag right there.

army240 · 03-29-2013, 04:26 PM

Quote:

Originally Posted by DS562

It's almost as if the crankshaft is seized but I can turn it 1/4 if I use a socket and breaker bar on the front main lug.

Have you tried this with somebody pressing on the clutch? Is the clutch pedal is moving freely and having a good feel?

Quote:

Originally Posted by DS562

The wheels also spin freely in all gears when on jack stands but, when the car is on the ground, I can't push the damn thing at all.

Probably because of the differential doing his job.

DS562 · 03-29-2013, 04:29 PM

It's a clunk. I think something is stuck in the bellhousing.clutch is fine, shifts fine. And I'm pretty damn strong, I can push a car when it's in gear.

foreverdeath · 03-29-2013, 04:44 PM

battery could be low, or starter took a shit on you. you spun the tranny by hand in every gear and everything worked so it cant really be the tranny. pull the spark plugs out as see if you can spin it easely, i could spin my DOHC ZC and d15b7 with just a my hand on the crank pully (altough tought).
sound frimler to my s13s frist atemps at starting it would cluck which would engage the pinion with the flywheel making a cluck but the starter motor never spun...

jr_ss · 03-29-2013, 04:55 PM

No offense, but this is a Nissan forum. Take it over to honda-tech.

foreverdeath · 03-29-2013, 04:57 PM

honda-tech is for snip ricers. take it over to D-series.org it you want real info.

jr_ss · 03-29-2013, 06:08 PM

Quote:

Originally Posted by foreverdeath

honda-tech is for snip ricers. take it over to D-series.org it you want real info.

Ok then... Not familiar with Honda sites, so listen to this guy?

DS562 · 03-29-2013, 07:56 PM

Found the problem. One of the clutch spring shield showered off and got lodged between the clutch and pressure plate. I did search those sites, they weren't very helpful

foreverdeath · 03-29-2013, 10:21 PM

Thats odd. My honda keep driving after doing that if, it wouldnt high speed shift tho. As the spring draged durignt the spin down.

DS562 · 03-30-2013, 01:31 AM

Well before, it would not go into gear under load unless I rev match. Which lead me to the diagnoses of bad synchros. But I now see that the chunk of metal wasnt allowing the clutch to fully disengage.

03-29-2013, 02:51 PM	#1
DS562 Zilvia FREAK! Join Date: Apr 2010 Location: Norwalk 90650 Posts: 1,151 Trader Rating: (7) Feedback Score: 7 reviews	Honda p20 transmission problem. Sorry for this, but I'm stumped. I just rebuilt a honda P20 manual transmission from a D series engine. I rebuilt it correctly, made sure all gears engaged and disengaged properly and were all aligned and spun in order when the input shaft was rotated. But that isn't an issue, now the car will not turn on. The flywheel will not turn when I try and start the car. Starter and the solenoid are fine but they can't turn the flywheel. It's almost as if the crankshaft is seized but I can turn it 1/4 if I use a socket and breaker bar on the front main lug. The wheels also spin freely in all gears when on jack stands but, when the car is on the ground, I can't push the damn thing at all. Any ideas? __________________ Zeeeeeeeee32

03-29-2013, 04:29 PM	#5
DS562 Zilvia FREAK! Join Date: Apr 2010 Location: Norwalk 90650 Posts: 1,151 Trader Rating: (7) Feedback Score: 7 reviews	It's a clunk. I think something is stuck in the bellhousing.clutch is fine, shifts fine. And I'm pretty damn strong, I can push a car when it's in gear. __________________ Zeeeeeeeee32

03-29-2013, 04:55 PM	#7
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,058 Trader Rating: (34) Feedback Score: 34 reviews	No offense, but this is a Nissan forum. Take it over to honda-tech. __________________ My SR20VET

03-29-2013, 07:56 PM	#10
DS562 Zilvia FREAK! Join Date: Apr 2010 Location: Norwalk 90650 Posts: 1,151 Trader Rating: (7) Feedback Score: 7 reviews	Found the problem. One of the clutch spring shield showered off and got lodged between the clutch and pressure plate. I did search those sites, they weren't very helpful __________________ Zeeeeeeeee32

03-30-2013, 01:31 AM	#12
DS562 Zilvia FREAK! Join Date: Apr 2010 Location: Norwalk 90650 Posts: 1,151 Trader Rating: (7) Feedback Score: 7 reviews	Well before, it would not go into gear under load unless I rev match. Which lead me to the diagnoses of bad synchros. But I now see that the chunk of metal wasnt allowing the clutch to fully disengage. __________________ Zeeeeeeeee32

03-29-2013, 03:39 PM	#2
foreverdeath Zilvia Junkie Join Date: Sep 2012 Location: va beach Age: 28 Posts: 318 Trader Rating: (3) Feedback Score: 3 reviews	what you you hear when you turn the key? a clunk, spining with no engage, tooth grinding.... honda FWD transmissions are so easy to rebuild.

03-29-2013, 03:40 PM	#3
di-devol Zilvia FREAK! Join Date: Jun 2010 Location: Woodinville Age: 39 Posts: 1,412 Trader Rating: (5) Feedback Score: 5 reviews	You can't turn the motor over more than 1/4 turn? That's a red flag right there.

03-29-2013, 04:44 PM	#6
foreverdeath Zilvia Junkie Join Date: Sep 2012 Location: va beach Age: 28 Posts: 318 Trader Rating: (3) Feedback Score: 3 reviews	battery could be low, or starter took a shit on you. you spun the tranny by hand in every gear and everything worked so it cant really be the tranny. pull the spark plugs out as see if you can spin it easely, i could spin my DOHC ZC and d15b7 with just a my hand on the crank pully (altough tought). sound frimler to my s13s frist atemps at starting it would cluck which would engage the pinion with the flywheel making a cluck but the starter motor never spun...

03-29-2013, 04:57 PM	#8
foreverdeath Zilvia Junkie Join Date: Sep 2012 Location: va beach Age: 28 Posts: 318 Trader Rating: (3) Feedback Score: 3 reviews	honda-tech is for snip ricers. take it over to D-series.org it you want real info.

03-29-2013, 10:21 PM	#11
foreverdeath Zilvia Junkie Join Date: Sep 2012 Location: va beach Age: 28 Posts: 318 Trader Rating: (3) Feedback Score: 3 reviews	Thats odd. My honda keep driving after doing that if, it wouldnt high speed shift tho. As the spring draged durignt the spin down.

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