UOA on Honda MTF
07-28-2008, 03:22 PM
#11
Thanks for the suggestion Spitfire. However, since I have change the fluid the shifts are like butter like once before. First thing when I got the car I adjusted the linkage to make sure the engagement/disengagement point was not too high or low.
07-28-2008, 03:50 PM
#12
Just for note - I ran out of Amsoil MTF and had to use straight Honda MTF - and have now experienced two very severe 1-2 grinds.
The first one was certainly the transmission - as I have been totally focussed on my shifting - however, the second one was probably at least partially me due to the fact some A-hole sped up and turned directly toward me in a Range Rover as I pulled out accross a busy street. I had to floor it to get accross the opposing lanes to get to the center lane, and probably rushed the shift. Still - no grinds in forever and now two shortly after switching to straight MTF. The Amsoil is on order. I hope there's not too much crap from those grinds floating around my transmission because I don't have the time to change it right now. I'm going with straight Amsoil MTF after it gets here. Hopefully no more grinds until then.
The first one was certainly the transmission - as I have been totally focussed on my shifting - however, the second one was probably at least partially me due to the fact some A-hole sped up and turned directly toward me in a Range Rover as I pulled out accross a busy street. I had to floor it to get accross the opposing lanes to get to the center lane, and probably rushed the shift. Still - no grinds in forever and now two shortly after switching to straight MTF. The Amsoil is on order. I hope there's not too much crap from those grinds floating around my transmission because I don't have the time to change it right now. I'm going with straight Amsoil MTF after it gets here. Hopefully no more grinds until then.
07-29-2008, 09:41 AM
#17
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s2kBryan916 Posted on Jul 29 2008, 03:07 AM
They are different, that's true....
s2kBryan916 Posted on Jul 29 2008, 06:53 AM
... but IMO not in the way you are explaining.
Quote from Honda-Tech:
(I'm not sure about the quality of the info but I think its more accurate than what you sk2Bryan916 are trying to make us think.. no offence)
IOW: carbon coated synchro's for AP2 trans.
That's it.
No "knife-edge" stuff or anything else going on in the AP1 trans.
Or explain what going on in this pic.
IIRC this was 5th gear synchro.
I think in the AP2 trans, part#1 is/are carbon coated, maybe just one cone (the middle one) or all 3.
Show us some pics of the "knife-edge" AP1 synchro
The ap1 and ap2 synchros are different.
s2kBryan916 Posted on Jul 29 2008, 06:53 AM
Ap1 has traditional knife teeth/edges on the sychros.
Ap2 uses a wet friction based material for the sychros.
Traditional synchros used small knife like edges to press against a flat surface to slow down the gear. (like in the ap1 trans).
The ap2 trans has small amounts of a friction based material to do the same job the knife edges do.
Ap2 uses a wet friction based material for the sychros.
Traditional synchros used small knife like edges to press against a flat surface to slow down the gear. (like in the ap1 trans).
The ap2 trans has small amounts of a friction based material to do the same job the knife edges do.
Quote from Honda-Tech:
(I'm not sure about the quality of the info but I think its more accurate than what you sk2Bryan916 are trying to make us think.. no offence)
Carbon fiber synchromesh replace the solid brass ones for all gears except reverse. The new design features a brass ring with a carbon fiber element bonded on the inner surface, resulting in simplified mechanical components, increased synchronizer capacity, improved abrasion resistance, and reduced weight. The weight reduction and increased capacity translates to a smoother and quicker shifting feel. Further enhancing shift feel quality is a reduction in the load acting on the disc spring. Per Honda, this tweak results in reduced shift knob operational load and reduced harshness.
That's it.
No "knife-edge" stuff or anything else going on in the AP1 trans.
Or explain what going on in this pic.
IIRC this was 5th gear synchro.
I think in the AP2 trans, part#1 is/are carbon coated, maybe just one cone (the middle one) or all 3.
Show us some pics of the "knife-edge" AP1 synchro
07-29-2008, 01:01 PM
#18
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Originally Posted by chuhsi,Jul 29 2008, 01:34 AM
I think the transmission fluid change interval is 105k miles...really.
07-29-2008, 01:32 PM
#19
Interesting, the oil analysis matched up with my gut feeling EXACTLY. We do the tranny/diff oil every 3rd oil change or roughly 10,000 miles. It gets notchy at about 7,500 but not terrible and no grinds so we do it every 10K. I knew there's no way that stuff would be good for 30K or whatever honda reccomends.
07-29-2008, 11:29 PM
#20
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Originally Posted by iDomN8U,Jul 29 2008, 11:01 PM
I believe Honda calls for 60K, which is still too late, changing it every 10k-15K seems like a good investment
Or some bearings may end up looking like this:
That's ^ one of the sec. reduction shaft bearings.
They are pretty high up at the rear of the trans and rely on the oil pump for oil, maybe a little splash lubrication too.
IMO it is not that bad to put a little more oil in, IOW when you raise the car at the drivers side (RHD) to get underneath, fill it till it overflows and put the filler back in.
Don't overdo it though
